Any cummins parts experts on here ?

SVcummins · Mar 23, 2021

I just got to thinking the donor engine was mated to an automatic transmission and the truck has a manual transmission. are the crankshafts the same between the two ?

Bob Bancroft · Mar 23, 2021

I don't know about your situation. When the 8.3 in my combine blew its cookies, we found one out of a garbage truck, which had an auto tranny hanging on it. When we got right down to the flywheel, something looked a little different with the flywheel/crankshaft pilot area, and I was devastated. The fellow I was working with [much more experienced than I] kept at it, and, whatever it was, was removable. So, I got lucky that day. I can only wish you the same luck.

caterpillar guy · Mar 23, 2021

I would not see why it would or should be. Cars are the same just need the pilot bearing in the crank/flywheel or don't depending on whether it is a stick or auto transmission.

UncleTom · Mar 23, 2021

Is the crank machined for a pilot bushing? Not a diesel mechanic, but in my car days not all cranks were machined for a pilot bushing.

SVcummins · Mar 23, 2021

Bearing goes in the flywheel on these

bc · Mar 23, 2021

You can probably manually shift smoother than an automatic anyway, right? So no problem.

lee little · Mar 23, 2021

I have put 2 5.9s out of school busses with Allison automatics into manual transmission machines. One a 93 Ford F250 and one a 806 farmall. No pilot bearing problems.

4520BW · Mar 23, 2021

I think that part will be fine but make sure the gears are cut the same.

ASEguy · Mar 23, 2021

If it's a six speed cast iron tranny you are wanting to put in, they only came in the high compression ratio engines. Automatics were paired with five speed tranny's in the lower compression engines. That is in the 2nd gen's. That would mean the crankshafts are different if you are going to use a six speed. I don't know if the flange end has a different pattern.

BhB · Mar 23, 2021

replaced the clutch on a 1960 283 engine the pilot bearing wouldn't fit. Found the engine was from a power glide and the beating was a different size, got the right one and it worked

MikeJM · Mar 23, 2021

End of the cranks are the same, auto, manual, HO, SO.
Internally the 98-2000 cranks are slightly different, they have a bolt on tone ring.

6.7 crank is almost the same, it has a slight pilot on the crank.

I have one of the few standard output 6 speed Dodge pickups made, its a 235 hp 2000.

SVcummins · Mar 23, 2021

Cummins parts shows to different parts numbers but both engine numbers bring up the same sets of parts number

used red MN · Mar 23, 2021

Bingo, carry on!!!

SVcummins · Mar 23, 2021

I didnt think any were made in 6 speed except the ho

MikeJM · Mar 23, 2021

From what Ive gathered there werent many and its slightly different than the HO trans, 1.25 input instead of 1.375.
I also have heard rumors that there was some 5 speed trucks build in 2003.

ASEguy · Mar 24, 2021

I suppose someone could special order one.

Destroked 450 · Mar 24, 2021

Not sure about your 24 valve Cummins but my 12 valve is from a rear engine shuttle bus with a Allison automatic
I used a adapter plate, a Dodge 24 valve 6 spd flywheel and Ford clutch to mate up to the Ford ZF 6 spd trans in my F-450
No modifications to the crank but did bore the center of the flywheel for the larger Ford pilot bearing

Any cummins parts experts on here ?

SVcummins

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Bob Bancroft

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caterpillar guy

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UncleTom

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SVcummins

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bc

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lee little

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4520BW

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ASEguy

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BhB

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MikeJM

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SVcummins

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used red MN

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SVcummins

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MikeJM

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ASEguy

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Destroked 450

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