6spd manual to 2 gen 12v which holds up best?

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Batespower

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Mar 11, 2012
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putting a 12v in f350 4x4 want a 6spd manual? also need adapter plate to go from 12v block to 6spd bell. any suggestions??
 
are you set on a 6spd or open to options. i would say just put a NV4500 in there and be done if its just a DD with little towing.
 
thanks for info but its a work truck i haul 8 - 10,000lbs daily. The g56 thats the dodge 6spd correct. forgive my ignorance but i've been out of the truck thing for a few years. The g56 what is its gvw rating? and is there a factory plated that hooks it to the engine
 
There's two six speeds. The G56 came in 05.5+, and the NV5600 started in late 99 and went to early 05. The earily NV5600 (99-00) had the weaker 1.25 input shaft. In 01 the input shaft went to 1 3/8.
 
silvercummins14 said:
A 12v bellhousing adapter will bolt up, you will just need a starter sapcer if its an automatic
Click to expand...

Depends on if he uses a 13" flywheel for the NV5600. Stock NV4500, no spacer, G56, no spacer, 1.25" NV5600, no spacer.
 
You also have the option of a zf6 from a Ford, although it will not fit in a stock automatic trans tunnel. I have one in my conversion and am very happy with it.
 
What else has to be swapped to use a ford zf6?

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if your towing, go with any of the 6 speeds

they are all rated to tow 10,000 in stock form
 
I meant anything special to use a ford zf6 behind a cummins.

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1-5-3-6-2-4 said:
I meant anything special to use a ford zf6 behind a cummins.

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Click to expand...

Sorry, I misunderstood. Need an adapter plate, crank spacer and longer flywheel bolts.. I used a cummins starter, 6 speed flywheel and clutch. I had to grind on the side of the trans for the starter to clear when it is engaged (extended). No computer mods are needed.
 
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Fairly simple then. No need to change input shaft or anything. Just use aftermarket flywheel and clutch.

Thanks. I've found one that I just might use in my destroke.

Ahhh *edit* just got message its a Chevy zf6. Would that change anything?

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Also you have to use a pilot bearing that will accept the Ford input shaft into the cummins flywheel. Valair installed one in my flywheel when I ordered from them for no extra charge.

I know the Ford zf6 uses an external cooler whereas the Chevy version does not. I'm unsure about any other differences.

Note: the trans tunnel in an automatic Ford will not fit a zf6. The tunnel has to be made taller.
 
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correct on the zf6 differences. im not even sure the ford zf uses and external cooler, i think it just has a circulation pump inside to keep the oil flowing
 
Do all of them have the cooler? For some reason I thought it was an option.

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