Author Topic: Will a 4 speed transmission used for a 318 work for 360  (Read 2954 times)

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Offline 87MoparPower

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Will a 4 speed transmission used for a 318 work for 360
« on: December 5, 2010, 05:38:40 PM »
Hi, I have a 87 Power Ram with a 318 with a 4 speed, with the granny gear and I have been considering swapping the motor and putting a 360 in it, because the 318 just does not have the power I want. If I decide to do it will I have to buy a different transmission or will everything match up to a 360?

Offline Elwenil

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #1 on: December 5, 2010, 05:49:30 PM »
Everything will bolt up except for the flywheel.  The 360 is externally balanced and needs a flywheel specifically for it.
L.Clemons

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Offline 87MoparPower

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #2 on: December 5, 2010, 06:08:11 PM »
That is music to my ears, a friend of mine has a 360 Im considering buying from him, but Im currently in the process of a ground up restoration of 1970 Nova SS so I need to finish it, before I jump into another project. Thanks for the help!

Offline Elwenil

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #3 on: December 5, 2010, 09:21:49 PM »
Go for it.  It's a quick job and doesn't take many extra parts.  About all that really different would be the 360 oil pan, which is only an issue if your 360 is coming out of a car, the driver's side engine mount bracket and the balancer, flywheel or torque converter.  Everything else is pretty much the same or fits the same as the 318 parts.
L.Clemons

1988 Ramcharger-Mil-Spec AW450 Project-318EFI-NP435 4 speed-NP205 Transfer Case-Front & Rear Dana 60s-Braden Wormdrive Front Winch
I do not like shortcuts.  Any job worth doing is worth doing right.

Auribus Tenere Lupum

Offline pjnuts19

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #4 on: December 6, 2010, 08:26:51 AM »
this is gonna be a stupid question, but what would happen if you ran a 318 flywheel on a 360?
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1967 autounion munga

Offline 87MoparPower

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #5 on: December 6, 2010, 11:22:03 AM »
Thats what I was hoping for and its def gonna happen cause I pull a 16 ft double axle trailer and a 18ft car hauler and that 318 just doesnt have the power I want, but for now Im making it work. Ill check on it I know he was going to use it for a cj jeep he was building, but Ill def find out what the motor came out of.

Offline SuperBurban

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #6 on: December 6, 2010, 01:34:23 PM »
this is gonna be a stupid question, but what would happen if you ran a 318 flywheel on a 360?
It would vibrate like hell, and wear out the main bearings real quick.
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Offline pjnuts19

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #7 on: December 7, 2010, 09:23:06 AM »
is their a time frame? as in if its after 1980 you cant run a 318 flywheel, while pre 1979 its ok? the reason why im askin is because i have a 360 engine date coded 5-13-72 and the flywheel that came in it looked identical to my 83 318 flywheel, i just want to make sure its going to be ok before im 100 miles from home with it and my motor craps out
1983 Dodge w150 reg cab short box stepside
1967 autounion munga

Offline 85 Royal SE Prospector

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #8 on: December 7, 2010, 09:48:23 AM »
is their a time frame? as in if its after 1980 you cant run a 318 flywheel, while pre 1979 its ok? the reason why im askin is because i have a 360 engine date coded 5-13-72 and the flywheel that came in it looked identical to my 83 318 flywheel, i just want to make sure its going to be ok before im 100 miles from home with it and my motor craps out
No, there's not a time frame. If the 360 is externally balanced, you can't run a 318 flywheel and have it balanced correctly. If the 360 at some point in its life has been internally balanced or the weights have been added to a 318 flywheel then it can be used.
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Offline SuperBurban

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #9 on: December 7, 2010, 09:57:53 AM »
is their a time frame? as in if its after 1980 you cant run a 318 flywheel, while pre 1979 its ok? the reason why im askin is because i have a 360 engine date coded 5-13-72 and the flywheel that came in it looked identical to my 83 318 flywheel, i just want to make sure its going to be ok before im 100 miles from home with it and my motor craps out
When you get into the magnum, or multipoint fuel injected engines, then things are different. but the carbureted and TBI engines, 93 and older, are just like was posted.
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Offline Gohot

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #10 on: January 29, 2011, 12:11:50 PM »
this is gonna be a stupid question, but what would happen if you ran a 318 flywheel on a 360?
Been there with a like problem. I bolted  a later  360 transmision to an earlier 318 motor'd Van. A mis-match of internal ballance and external ballance. What you have is a vibration that becomes so bad at over 35MPH that you dare not go faster. BELEIVE me, you won't even get going that fast and not know that it is an EPIC FAIL combo.
Slow awake........fast asleep..

Offline Gohot

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Re: Will a 4 speed transmission used for a 318 work for 360
« Reply #11 on: January 29, 2011, 12:13:30 PM »
Kind of like mounting a jackhammer on a rocking chair.
Slow awake........fast asleep..

 

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