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Author Topic: Need to replace Speedo cable  (Read 2880 times)

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Offline dant98

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Need to replace Speedo cable
« on: October 11, 2004, 08:43:55 AM »
My Speedo hasn't worked in my truck since I bought it.  The odometer doesn't either, but I assume that's related.  I was told by the previous owner that the cable was bad, though haven't confirmed that it is myself yet.  When I replace this cable, how do I make sure the speedo is calibrated for the 33" tires I have on the truck?  Do you change out speedo gears or something?  And if so, where do you get said gears?

Thanks!

-Dan
So your honda has 1.8 Liters where as my bottle of Mountain Dew has 2?

1984 Dodge Ramcharger Royal SE (360ci)

http://www.supermotors.org/registry/vehicles/detail.php?id=6331

Offline Slanted_Mind

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RE: Need to replace Speedo cable
« Reply #1 on: October 11, 2004, 12:16:48 PM »
Check with your dealer for the speedo cable gears--they go in the tranny, not the gauge though. (Trans is actually probably easier to get at anyway)

As for the cable, go to you favorite parts store and get a replacement.  My local NAPA has the 'repair kits' for about $10.  All you need to do is pull the old cable out of the outer casing, and slide the new one in (don't forget to grease it).

Not positive on the '84, but trace your cable from the firewall to the trans.  If you have a vehicle speed sensor (VSS) down by the driver's fenderwell, there are two separate cables, and you need to find which one is broken.  I would say you cable is most liekly broken right at the speedometer end, as the speedometer drive end is plastic...that is where mine broke.

-SM
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Offline cooper30

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RE: Need to replace Speedo cable
« Reply #2 on: October 11, 2004, 01:22:49 PM »
I had to replace a speedo cable and the gears in an old 84 4x4 RC I had.  Since there was no cruise control, it was simple to replace the cable.  One piece from the back of the instument cluster to the back of the transfer case-that's where it goes in.

The guy I had purchased the RC from told me that the speedo didn't work and he was quoted a lot of money to get it fixed.  In addition to the new cable, I had to replace the pinion gear and the sleeve that is inside the back part of the transfer case.  They are both made of plastic and for some reason they had both been ground smooth.  I'm not sure why, but after I replaced everything I never had a problem.

As far as the gears, Here's some pics from an 84 fsm.  I bought my new pinion gear from a dealer and I told him what size tires I was running and he gave me a pinion with the correct tooth count.







To replace the sleeve, I just disconnected the rear driveshaft at the t-case and took the back cover off the t-case.  The sleeve slid right off and the new one slid right on.  It was that easy.

I don't remember how much everything cost, but I do remember being surprised at how cheap it actually was.

Also, this was one of the first things I ever did on a vehicle besides change the oil.  It was pretty simple.
« Last Edit: October 11, 2004, 01:31:58 PM by cooper30 »
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Offline Major Ramifications

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RE: Need to replace Speedo cable
« Reply #3 on: October 12, 2004, 12:19:35 PM »
Congratulations! Welcome to the wonderful world of saving money and time by fixing it yourself. The main thing to remember about vehicles is that they were designed and built by people no smarter than you or I, so we should be able to fix them when they break. Of course, it helps to have the FSM!
1985 Power Ram shortbed W150 Custom - 360, 727 P/S, P/B, C/C. Balanced and blueprinted 360 9.1:1 actual CR, EQ heads, Comp Xtreme Cam, Eagle Rods, Hooker Headers, Edelbrock Performer intake and carburetor,  31x10.5-15 Dakota M/T tires on chinese American Racing 15x8 Baja rims. Needs lower gears.

Offline dant98

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RE: Need to replace Speedo cable
« Reply #4 on: October 15, 2004, 09:40:28 AM »
OK, I took the gauge cluster out last night and I've confirmed that the speedo cable isn't spinning (took it for a drive with the cluster off).  My truck has cruise control (or at least it's supposed to).  This should mean that I need a speedo cable and a VSS to replace everything from the speedo to the tranny?

I found this at advance auto:
http://www.partsamerica.com/PartDetails.asp?SourceArea=&SourcePage=SEARCHRESULTS&MfrCode=GPS&MfrPartNumber=7799509&PartType=1179&PTSet=A

I assume i need this and another cable?  Or does this sit between two other cables in the speedo cable assembly?
So your honda has 1.8 Liters where as my bottle of Mountain Dew has 2?

1984 Dodge Ramcharger Royal SE (360ci)

http://www.supermotors.org/registry/vehicles/detail.php?id=6331

Offline SD3quarterPW76

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Re: Need to replace Speedo cable
« Reply #5 on: December 27, 2005, 10:40:01 PM »
OK, I took the gauge cluster out last night and I've confirmed that the speedo cable isn't spinning (took it for a drive with the cluster off).

i did the same thing last week after i replaced the speedo cable with a brand new one and yeah,  mine wasn't spinning either. so i guess i get the pleasure of playing around in the TC. i guess the adaptor is mis-aligned, cause the teeth look brand new. hmm,  guess i'll play with it this weekend.
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-- in the process of trying to find a lil truck with a V8...

 

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