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Author Topic: A-518 Overdrive swap - Big Block  (Read 27686 times)

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Offline 79 D200 Sleeper

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A-518 Overdrive swap - Big Block
« on: April 14, 2008, 02:36:40 PM »
Well.... after a little bit of serendipity, I've decided to swap out my busted 727 for a more "modern" A518. With the 4.10 gears I have in the rear, the 31% overdrive will be a welcomed addition to the drivetrain.

Currently, 65mph brings the engine to about 3100rpm. To pass someone at 75mph, the engine is humming around 3600rpm. With the A518, the RPM's will drop to 2100 at 65mph, and 2500 at 75mph. This will be very much enjoyed by my wife, my wallet, and myself. I love how the big-block sounds, but damn - it gets old quickly when you're trying to talk to someone at cruising speeds. I am hoping to break 15mpg as well, but we'll see about that.

Since I'm doing to swap in a big-block truck, I had to order the bellhousing adapter from PATC. I got a re-manufactured trans from "Phoenix Re Trans". I also ordered a Trans-Dapt universal transmission crossmember, as I didn't feel like hacking/welding the existing crossmember. The only thing I'll need to do (other than put it all in and drill the holes for the new mounts), is to have my driveshaft chopped down about 3.5". Currently, I'm looking around for local shops to do it.

I'll keep everyone posted and will maybe do a write-up on it when I'm done.

Check out the progress --> http://www.cardomain.com/ride/2834477/9

79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline cragdweller

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Re: A-518 Overdrive swap - Big Block
« Reply #1 on: April 19, 2008, 11:03:35 AM »
Let us know how the adapter works.  Most guys are using the trans pump located bellhousing, which requires cutting and grinding the integral bellhousing off the small block 518.  How thick is the adapter?
1975 Plymouth Trail Duster Sport.  440/727, 203/205 doubler, Dana 60 front and 70 rear.  Still under construction...

1977 Dodge Power Wagon W200 Crew Cab.  Next project.

2002 2500 Quad Cab Short Bed 4x4.  Cummins HO w/ NV5600 six speed.

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #2 on: April 21, 2008, 11:30:16 AM »
  How thick is the adapter?

I just called PATC - they said it was drop-shipped for their vendor so I should be getting it soon (within the next 2 days). I'll post some pics to my cardomain page and I'll even try to get it installed on the engine, along with the new flywheel and spacer.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #3 on: April 23, 2008, 08:26:25 AM »
Well - all of the parts finally arrived, including the transmission adapter. I ordered everything from PATC racing; however, I've come to find out that they use http://www.smrtrans.com/ as their supplier for the trans adapters.

To answer cragdweller, the adapter plate is about 1/4" thick, so the flywheel adapter is roughly of the same thickness.

The instruction sheet says that I will need to grind off the "dog ear off the lower half of the engine block - directly below the factory starter mounting location". This is supposed to allow you to run the stock style starter. I'm using a more modern "mini-starter", so I will see if I can make it all fit before grinding.

Currently, my headers are at Jet-Hot getting the "extreme sterling" coating. When they are finished, and I finally get the trans dropped off, I'm going to bolt it all together to see how it all fits and to see if I need to "clearance" anything again.

I'll post some pictures this weekend!
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline cragdweller

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Re: A-518 Overdrive swap - Big Block
« Reply #4 on: April 23, 2008, 07:59:59 PM »
I've looked at the SMR adapter plate, but haven't had any feedback on how well it works.  Thanks a lot for reporting back to us on this, and good luck with the project.  Hopefully you don't have to grind or cut anything off your block, that would make it a less desirable method.  I think the mini-starter will help with that...
1975 Plymouth Trail Duster Sport.  440/727, 203/205 doubler, Dana 60 front and 70 rear.  Still under construction...

1977 Dodge Power Wagon W200 Crew Cab.  Next project.

2002 2500 Quad Cab Short Bed 4x4.  Cummins HO w/ NV5600 six speed.

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #5 on: April 29, 2008, 08:55:00 AM »
Took advantage of the "down time" and had my headers Jet-Hot coated with their Extreme Sterling finish (1700F).

79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline DoomsdayJesus

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Re: A-518 Overdrive swap - Big Block
« Reply #6 on: May 2, 2008, 04:56:56 PM »
The only thing I'll need to do (other than put it all in and drill the holes for the new mounts), is to have my driveshaft chopped down about 3.5". Currently, I'm looking around for local shops to do it.



just had some driveshaft work done at Arizona Drivelines -> Drive Shaft Superstore

It's right off I-17, south of Van Buren, if your still looking.

Good luck - that 440 looks sweet  :)
1990 5.9l 4-spd 2.5" lift 33" ProComps 17" AR-767s cv-joint rear driveshaft

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Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #7 on: May 5, 2008, 08:59:36 AM »
just had some driveshaft work done at Arizona Drivelines -> Drive Shaft Superstore

It's right off I-17, south of Van Buren, if your still looking.

Good luck - that 440 looks sweet  :)

Sweet tip! Thanks for the help - I much prefer going to a shop that has "good karma".
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #8 on: May 5, 2008, 10:21:12 AM »
Headers look great! Whats it cost to have done?
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
440 pics

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #9 on: May 5, 2008, 12:11:49 PM »
Headers look great! Whats it cost to have done?
$320 - if you decide to do this, first get an "online quote" - then wait 5 days and they'll send you a package in the mail with a 10% off coupon.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #10 on: May 5, 2008, 12:24:20 PM »
OK - I've hit some issues in this swap, time to ask some questions...

Issue #1:
Apparently, Mopar changed the torque converter (TC) bolt pattern in the middle of the 46RE/46RH run. Later models got a "90-degree" bolt pattern, meaning that the mounting holes in the TC are symmetrically spaced. Earlier models used the "old school" pattern, where one of the TC mounting holes was offset. Of course, I got a TC from a later model so it won't match up to my adapter flexplate.

Issue #2:
With doing the above research, I got to thinking about my engine. The block is a 1978 6-bolt crank. Can someone verify that I have an INTERNALLY balanced crankshaft and do not need TC/flywheel weights like the 360 or 440-6pack crankshafts? This is actually causing me some grief. I figured that I can just run an earlier model TC and the bolt holes will line right up. However, when looking around - all of the earlier model TC's have "butter fly weights (whatever those are) and are designed for 5.9L Magnum engines (I think so at least). The 727 that I took out does not have flywheel weights, so I assume that I do not need them here.

I've emailed SMR to ask them what model+year A518 TC they designed the adapter for. Of course, I have a feeling that they're going to tell me that it's for the earlier model "offset" mounting hole TC. This is fine and dandy, but I am unable to do so since my engine is internally balanced (I think).

Issue #3:
When I try to line up the TC and flexplate holes, they are only off about 1/4" when I rotate the flexplate the right way. This has me wondering - wouldn't an "offset" mounting pattern be much more offset than 1/4"? To be honest - it's more like an 1/8" off. I wonder if SMR didn't drill the holes in the exact location. Has anyone "clearanced" flexplate holes before to fit better?
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline russellmopar

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Re: A-518 Overdrive swap - Big Block
« Reply #11 on: May 6, 2008, 11:41:21 PM »
I just elongated one of the holes on my flex plate.  I have yet to experience any vibration or any ill effects.  This is with a 98 5.9 Magnum to a 93 2wd 518 that originally sat behind a 5.2   
1978 Dodge D150 Stepside/Utiline
360 Magnum 4bbl posi A518 automatic overdrive

1940 Plymouth coupe
360 Magnum MPFI Megasquirt-2 A518 automatic overdrive
3.23 posi

My Dad's
1969 Plymouth Roadrunner Convertible
440 MPFI Megasquirt-2 727 Gearvendors overdrive 3.55 posi
1976 CJ7 Jeep
304 4

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #12 on: May 7, 2008, 09:53:55 AM »
I just elongated one of the holes on my flex plate.  I have yet to experience any vibration or any ill effects.  This is with a 98 5.9 Magnum to a 93 2wd 518 that originally sat behind a 5.2   

Anyone else ever elongate a hole in a flexplate on a BB/SB Mopar? I did it before on a SB-Ford and never had an issue.

It turns out that I have a rare 1977 440. In the late 60's, Dodge put forged cranks in "heavy duty big blocks", starting with the 413. They continued this until the big-block production ended. They built these heavy-duty big-blocks for RV's, Motorhomes, and "international support vehicles" (whatever that means).

This means I can use the converter that I have since it doesn't have a balance weight.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #13 on: May 8, 2008, 03:19:46 PM »
For those wondering - yes, you will need to grind the "ear" on the block where the starter goes. With the new A518, it just doesn't bolt up. The ear sticks out dead center of where the starter is supposed to go into the transmission.

Looks like I'll be making a trip to Home Depot for some new cut off wheels!
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline cragdweller

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Re: A-518 Overdrive swap - Big Block
« Reply #14 on: May 8, 2008, 07:09:53 PM »
What did that 440 come out of?  What do the stampings on the ID pad say (flat spot on the block, just in front of the driver's side cylinder head)?  Its pretty rare for a '76 vintage 440 to have a forged crank (internally balanced).  But it looks like yours has the forged crank balancer, so its possible.  Maybe the motor was rebuilt?  Have you had the pan off to verify whether its a forged or cast crank?  The cast crank motors are externally balanced and need a weighted torque converter or a weighted flexplate.
1975 Plymouth Trail Duster Sport.  440/727, 203/205 doubler, Dana 60 front and 70 rear.  Still under construction...

1977 Dodge Power Wagon W200 Crew Cab.  Next project.

2002 2500 Quad Cab Short Bed 4x4.  Cummins HO w/ NV5600 six speed.

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #15 on: May 9, 2008, 09:54:03 AM »
What did that 440 come out of?  What do the stampings on the ID pad say (flat spot on the block, just in front of the driver's side cylinder head)?  Its pretty rare for a '76 vintage 440 to have a forged crank (internally balanced).  But it looks like yours has the forged crank balancer, so its possible.  Maybe the motor was rebuilt?  Have you had the pan off to verify whether its a forged or cast crank?  The cast crank motors are externally balanced and need a weighted torque converter or a weighted flexplate.

I bought it from a guy who had it in a Belvedere (I think that's spelled correctly!). He pulled it from a wrecked 77 or 78 Motorhome and had it rebuilt using cleaned-up 906 heads, a Mopar Performance camshaft, and some other basic upgrades. I have taken the oil pan off so I could install a truck-type oil pan (rear sump). It didn't even dawn on me to look at what type of crank it was. Brad - the gentlemen I bought this block from and who is also going to sell me a 400-BB (for a 451 stroker), says the balancer was the one that came with the engine. Neither the TC or flexplate had balance weights on it.

I'll check the ID pad this weekend...
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #16 on: July 30, 2008, 10:34:32 AM »
Here are some pics...

Here's the adapter plate installed...

Engine and trans mounted...

The ground off "ear"...

And the modified dipstick tube - since I'm using headers
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline warlock4x4

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Re: A-518 Overdrive swap - Big Block
« Reply #17 on: July 30, 2008, 04:51:36 PM »
Nice to see this since I was thinking of trying to put one in the Warlock when the time came.
78 Dodge Warlock 440/727/203 11" lift D44HD/D60HD disc 5:13 L/S rear 40" Hawgs Cross-over
85 Dodge Ramcharger 360 4bbl/727/np208 shackle flip 33" TRXUS Powertrax no-slip
92 CTD 4x4 towing machine

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #18 on: July 31, 2008, 02:34:51 PM »
looking Good!!! & I'm taking notes ;D
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
440 pics

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #19 on: August 4, 2008, 02:51:22 PM »
Finally! I got a chance to work on the truck for more than 15 minutes at one time!

I got the x-member fully installed and the driveline angles look like they're matching up (and hence cancelling out). I left about -0.5 degrees on the pinion angle to account for the fact that when driving and under load the rear will "point" upwards.

Drilling through the frame was rough, in more ways that one. First - it was physically rough, causing me to resharpen my bit every second hole. Secondly, I was drilling through my frame so I took MANY MANY measurements and double checked everything. It looks like it turned out just fine... then again, those are the famous last words of many blown-up projects.

The good news is that I think my exhaust will clear the new crossmember easily. The bad news is that hooking up the pressure switches will require some effort. The pressure port on the side of the case is pretty tucked away in the transmission hump. I may have to check my options here, but I think I'm going to run a steel tube (brake line with the proper fitting) and then connect it to a 1/4" tee.

I'll post some more pics of the trans x-member.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #20 on: August 26, 2008, 03:26:41 PM »
CRAP! What an idiot I am! I installed the engine back in the wrong location! Just another example of why I need it to cool down outside so I can install my shop lights. I should have noticed it though, I set the engine down a long time ago.

Anywho - I did have some luck. It turned out that the distance between the engine mounting holes is the same distance between the Trans-Dapt crossmember mounting holes, so I only needed to redrill 2 holes for each crossmember. I had to remeasure (and remeasure and remeasure and remeasure) the driveline angles, but everything worked out just fine.

The engine mount fiasco killed about 3 hours, and trying to get the starter to clear the headers took about 3 more. Regardless of what is said elsewhere - THE STOCK MOPAR STARTER WILL NOT WORK WITH AN A518 SWAP. You will need the mini starter - and in the case of Mopar trucks with headers, you'll need to clearance them with a ball pen hammer. This usually isn't an issue, but I made the mistake of having my headers Jet-Hot coated before getting them to fit. I didn't mess up the finish too bad, it just was painful having to bang a spot flat.

This weekend I'll move on to installing the new plugs, carb, linkage, and OD switches. I already modified the BB trans dipstick to fit, along with the engine oil dipstick. Once I get my driveshaft back, I should be running in no time!
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline ramitupurs84

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Re: A-518 Overdrive swap - Big Block
« Reply #21 on: August 26, 2008, 03:37:54 PM »
So you started banging before the mini starter?

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #22 on: August 26, 2008, 04:20:50 PM »
So you started banging before the mini starter?
No - I was installing the mini-starter before banging. The old starter is, well, old - and dirty and grimy and heavy. Plus, the headers need to be unbolted when you want to replace the starter. Now, after clearing, I can remove either the header OR the starter individually.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #23 on: September 2, 2008, 02:46:59 PM »
Updates!!

The engine/trans are fully installed. I got the engine started to make sure there weren't any TC/flywheel issues. Everything sounded great and she started after about 30 seconds of cranking she started right up. The gas from the carb was drained and even though it was capped, the gas from the lines had evaporated. I was seeing pressure on the gauge while cranking so the delayed start helped prime the pump since I dropped the pan while the engine was out (installed a new "crush proof" gasket).

I only let her run for about 20 seconds since the radiator isn't installed and there wasn't any fluid in the block. It was more of a sanity check than anything. Probably not the best thing to do to an engine, but it was worth it to me before putting everything back on only to have to take everything off again.

On a side note: I've always been a big fan of the "whiny" new Dodge starters. Not only did I get the wonderful "wheee whee whee" noise by switching to the mini-starter, it also made the engine spin much faster than before.

I have to pick up my driveshaft today from Mesa Driveline. Apparently, my old shaft was bent beyond their comfort level so I have them build me a new one. It was pricey, about $270, but in reality it was only $140 more than having them cut and balance my old shaft.

If I can find some time tonight, I'll get the radiator back in and the shifter/kickdown linkage hooked up. With any luck, I'll be able to hook up the OD switches by the weekend and I'll take this bad girl for a cruise on Sunday!

Would anyone be interested in an A-518 write-up for the How-To section? I have a few pictures and can add them to a simple word document for anyone thinking about it.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline ramitupurs84

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Re: A-518 Overdrive swap - Big Block
« Reply #24 on: September 2, 2008, 05:15:38 PM »
I would say do it...long time no talk...good to hear all is in your favor. Can we get some video?

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Re: A-518 Overdrive swap - Big Block
« Reply #25 on: September 2, 2008, 07:14:05 PM »
Would anyone be interested in an A-518 write-up for the How-To section? I have a few pictures and can add them to a simple word document for anyone thinking about it.

ABSOLUTELY!!
78 Dodge Warlock 440/727/203 11" lift D44HD/D60HD disc 5:13 L/S rear 40" Hawgs Cross-over
85 Dodge Ramcharger 360 4bbl/727/np208 shackle flip 33" TRXUS Powertrax no-slip
92 CTD 4x4 towing machine

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #26 on: September 3, 2008, 02:28:36 AM »
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
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Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #27 on: September 3, 2008, 09:57:03 AM »
I would say do it...long time no talk...good to hear all is in your favor. Can we get some video?
Of the install or the test runs?
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline warlock4x4

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Re: A-518 Overdrive swap - Big Block
« Reply #28 on: September 4, 2008, 02:15:09 PM »
The install with info on the test
78 Dodge Warlock 440/727/203 11" lift D44HD/D60HD disc 5:13 L/S rear 40" Hawgs Cross-over
85 Dodge Ramcharger 360 4bbl/727/np208 shackle flip 33" TRXUS Powertrax no-slip
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Offline ramitupurs84

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Re: A-518 Overdrive swap - Big Block
« Reply #29 on: September 4, 2008, 03:25:24 PM »
Well it running and driving I am curious to hear it...

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #30 on: September 5, 2008, 10:13:55 AM »
Here are those pics I was talking about...

Here's the pressure switches. If you choose to go with a non-lockup converter, then you will only use one of these. The 48psi switch is for the OD, and the 52 is for the lock-up function. These all came from PATC and are 1/8" NPT threaded which makes finding fittings pretty easy.


This is the Trans-Dapt crossmember.


I installed a NPT/FIF fitting in the side of the case so I could attach a steel brake line to it. If you had the space, or clearanced the floor, you could install the fittings or switch directly into the pressure port.


This is the vacuum switch, also from PATC. I installed in on the firewall because it's close to the vacuum source and the transmission.

For those who may not be familiar: 12V+ comes into the vacuum switch. When vacuum is greater than 7in-Hg, the switch closes, and the circuit is hot. When hot, the solenoids are powered but are still open. When each switch hits its correct pressure, the circuit is closed and the truck will shift into OD or the converter will lock up.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline ToxicDoc

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Re: A-518 Overdrive swap - Big Block
« Reply #31 on: September 5, 2008, 10:25:17 AM »
This thread should be stickied to the top for future reference.  It is a wealth of information for anyone interested in the swap.
'85 W150 SB, 408 stroker, Magnum manifolds, Performer RPM, 670 Truck Avenger, HEI ignition, Auburn LSD 9.25 and '82 D44 (non-CAD) with 3.55/3.54,  NV4500/NP241

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #32 on: September 5, 2008, 10:52:58 AM »
This thread should be stickied to the top for future reference.  It is a wealth of information for anyone interested in the swap.

Thanks! I'm glad you appreciate the info...



I forgot to post this picture - if you are wondering why I needed to grind the block down to fit the starter, here's the reason. The ear is directly in the center of the starter location.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline tv_larsen

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Re: A-518 Overdrive swap - Big Block
« Reply #33 on: September 5, 2008, 09:34:06 PM »
Would anyone be interested in an A-518 write-up for the How-To section? I have a few pictures and can add them to a simple word document for anyone thinking about it.
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Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #34 on: September 15, 2008, 04:32:31 PM »
In case you were wondering - ALL exhaust studs/bolts go into the coolant passages! This weekend I went through a 68' 383, a 69' 440, and a 77' 440 and all bolts go into the water jacket.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #35 on: September 16, 2008, 02:39:51 AM »
Thanks for the great info! Yes this should be stickied to the top for future reference!!! When your tied into the vacuum line it looks like it should unlock & drop out of OD if you get your foot into it or head up hill? This is on my list of to dos yet. It'll probably be next year though ::). Thanks again for helping us out!!
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
440 pics

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #36 on: September 16, 2008, 09:36:01 AM »
When your tied into the vacuum line it looks like it should unlock & drop out of OD if you get your foot into it or head up hill?
Yup, that's the point of it! When the engine vacuum gets below 7", it opens the circuit which cuts power to the OD/LU solenoids. Essentially, it acts like a throttle position sensor and the pressure switches on the trans act like a speed sensor.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #37 on: September 16, 2008, 10:15:23 AM »
That is sweet!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
440 pics

Offline bigdog440

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Re: A-518 Overdrive swap - Big Block
« Reply #38 on: September 16, 2008, 09:17:41 PM »
awesome tech, i agree do a how to! great job bro. ;D
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Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #39 on: September 17, 2008, 09:17:22 AM »


Someone asked me about this in the past. This is real easy to do, I used an angle-grinder with a cut-off wheel. I smoothed the cut with a sanding disc (flap type disc) and painted it to prevent rusting.

In reality, this ear doesn't do much to support the engine/trans or starter. There's no reason that I can see why I couldn't install a 727 onto this engine. I'm contemplating this idea because I have a 1968 383 with 31K miles that is BEGGING me to rebuild her. The more I look into the Edelbrock fuel-injection setup, the more I "have" to have it! Fuel injected 383 with an overdrive.... even saying that sounds bad-ass! Then again, I'm in the no rush - the 440 is no slouch!
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #40 on: September 17, 2008, 04:48:25 PM »
Here's a +1 for ya. & thanks again for the great info!!
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
440 pics

Offline Petey

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Re: A-518 Overdrive swap - Big Block
« Reply #41 on: September 24, 2008, 04:32:12 PM »
Off-road build up for 1989 W150
 318/727/241 9.25 dana 44
Plan: big truck with lockers (done), big block(maybe), and 38s (done)

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #42 on: September 24, 2008, 04:40:53 PM »
Here is another option to get overdrive-
http://www.geocities.com/tranztech/overdrive_torqueflite.html

Looks like a questionable option to me - I bet it's just a modified A518 or similar with a pressure switch. I can't tell because their pictures aren't visible. Also, not to sound like a snob, I wouldn't buy anything from a company that has their website hosted by geocities! I "googled" them without any luck.

Honestly, this swap isn't difficult and from what I've done so far, seems to be worth it. I should take her on a little trip this weekend (if I can find the time!) to see how she rides. I was working on a Newport the past 2 weekends and had to put the Dodge on hold. I'll post more pics and info on Monday of the "test results".
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #43 on: September 29, 2008, 08:41:19 AM »
GOOD NEWS!!!  ;D ;D ;D

The overdrive works flawlessly! The transmission shifts smooth and overdrive/lock-up functions as they should. I had to charge up some batteries for my GPS, so I couldn't verify "shift speed". The pressure switches advertise 48mph, but that is assuming 48psi at the diagnostic port. I bet it's close as I haven't modified anything (e.g. gear ratios), but I'd still like to check. I'm considering 4.56 gears, so having a baseline will help, should I need to change switches in the future.

I have to seal the pressure switches with Teflon tape. I used a small amount of thread-sealer on the threads the first time around, but they still leaked. This was a bit unusual for 1/8"NPT, but the tape sealed them up nicely.

A lot of other forums and webpages say that the driveshaft will need to be cut about 3.5". On my 2wd, I had a new driveshaft made and it was only shortened about 2.25". I would make sure that anyone doing this swap gets their driveline angles correct and measure the driveshaft correctly before having it modified.

I'm going to read the "How-to a How-to" and will do a write up sometime in the near future.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline jungle

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Re: A-518 Overdrive swap - Big Block
« Reply #44 on: September 29, 2008, 09:10:30 AM »
That is some AWESOME news!!!!!!!!!!!!!!!!!!!!!!!!!!
This swap is on my list to do.
What are you running for stall speed on your converter?
1988 RC.the gold one   pics
1988 RC.440,4" lift,727 
BIG BLOCKS RULE !!!!!!!
440 pics

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #45 on: September 29, 2008, 10:20:55 AM »
I opted for the OEM stall speed - around 1200rpm from what I can tell. It is the "HD" version, which just means that the internals are slightly beefed up during the rebuild. I chose the stock one because it was free. I had the guy throw it in for free since I was buying the trans from him. He offered to give me the beefier version since he's a Mopar guy and knew that I was installing it behind a 440.

I got everything from Phoenix Re-Trans, here in Phoenix, AZ. I have the contact info around somewhere if anyone needs it.

I ordered the "3-pin" A518, so it has a lock-up converter. From my initial tests, it drops the RPM's by about 200 at cruising speed when it kicks in.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline kingcrunch

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Re: A-518 Overdrive swap - Big Block
« Reply #46 on: October 4, 2008, 10:47:28 PM »
Hi,

i think i'm missing some information. The linked site of "tranztech" says, the A518 doesn't mate directly to bigblocks, but it does mate directly to small-blocks like the 318?

Probably a naive question:
Can i simply swap the tf727 tranny to the A518, bolt on the np205 (dunno what i got exactly), shorten and lengthen the driveshafts, add the vacuum switches and hit the road again? did i miss something?
Are the tf727 and A518 equal in length  (so that no modification of the driveshafts would be necessary?!) ?

And another one:
What's a good source for a A518?

Thanks.

Regards,
Alex

Check out my blog

1976 W200/M880 ex mil. 318/NV4500/NP203/D44/D60/EZ-EFI/HEI

Soon: 5-spd NV-45000 swap & factory AC!

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #47 on: October 5, 2008, 09:50:24 PM »
First - forget "tranztech".

Secondly, you are correct. You need an adapter to mate a big-block to a A518. I did a write-up of the "How-to", it should be up shortly. It outlines what options you have for this.

The A518 is a bit longer than the 727, so you'll need to modify the crossmember and driveshaft lengths.

A good source for the A518 is a transmission rebuilder shop. Here in Phoenix, I used "Phoenix ReTrans" - about $1300 (with a $400 core) with a 1-year warranty.
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

Offline kingcrunch

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Re: A-518 Overdrive swap - Big Block
« Reply #48 on: October 6, 2008, 12:32:42 AM »
First - forget "tranztech".

Secondly, you are correct. You need an adapter to mate a big-block to a A518. I did a write-up of the "How-to", it should be up shortly. It outlines what options you have for this.

The A518 is a bit longer than the 727, so you'll need to modify the crossmember and driveshaft lengths.

A good source for the A518 is a transmission rebuilder shop. Here in Phoenix, I used "Phoenix ReTrans" - about $1300 (with a $400 core) with a 1-year warranty.

Thanks a lot.
But just to get that right: i am correct, like "yes, the A518 mates directly to a small block" ?

Regards,
Alex

Check out my blog

1976 W200/M880 ex mil. 318/NV4500/NP203/D44/D60/EZ-EFI/HEI

Soon: 5-spd NV-45000 swap & factory AC!

Offline 79 D200 Sleeper

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Re: A-518 Overdrive swap - Big Block
« Reply #49 on: October 6, 2008, 07:01:27 AM »
"yes, the A518 mates directly to a small block"
79' D200 - 440cid (approx 450hp), SMR-built A518, SMR 2000 RPM stall converter, D60 w/4.10 gears, CDI Ignition, Jet-Hot coated Headmans, MB Wheels, 3" PFA body lift, Nitto Grapplers
2003 G35 Sedan - 274 RWHP, Borla Exhaust, Z-intake, K&N, reflashed ECU, 18" KMC's, 235/50 BFG g-Force TA

 

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