1998 F800 drivetrain into 1993 F-350

[Wildbill_81]

I have 1998 5.9 12V Cummins and 6speed Allison auto from an F-800 I was thinking of swapping into my 1993 F-350 crew cab dually. It originally had a 7.3 idi. Anybody try this before? I have some ideas of adding a divorced transfer case and Dana 60 front axle in the future as well.

 

[79jasper]

Many many many many many many people have done that.
Except the Allison part. But it can be done also.

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[Wildbill_81]

I know the 12V swap is nothing new...hell there are entire companies who make a living off of it. I am looking more for anyone who has put the 5.9 AND Allison 6 speed from a Medium Duty truck into their pick-up and what kind of issues they ran into....

 

[79jasper]

Ah, gotcha. I don't think anyone here has.
But via a quick Google search, I saw people who have.

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[jhenegh]

"Subway" is doing a DT360 and a medium duty 5 speed into his. Oughta be at least similar dimensions to yours with an inline 6er and an SAE bell housing and medium duty-sized trans. He has lots of pictures going on his work.

 

[BrandonMag]

Browse around here:

http://www.4btswaps.com/forum/forumdisplay.php?22-Transmission-Adapter-Transfercase-Discussion

 

[Dogbrain]

I did the same thing with my truck, except I used a medium duty (f700 I think it was) with a 6 speed Eaton manual. I also used a divorced transfer case as well.

 

[Ironman03R]

I'm going down the same road... I have an f600 with 5.9 and 545 Allison but I want OD. The problem with the Allison MD 3060 6 speeds is that they are all computer controlled with its own computer that only Allison can program. From what I have read all those transmissions have ability to have 6 gears but only some have the programing to do so. I did some reading on some buss/RV fourms and most have not had luck getting Allison to program there computer with anything other than factory programing for there application.
My MD 3060 was behind a 7.3 powerstroke in a school bus so I will have to get the computer reprogrammed for the new engine and try to get 6th gear unlocked. The good thing is that from everything I read the only input to the trans computer is a thottle position sensor. The rest is all in the computer programming.
I think you have a better starting point since your doner engine and trans came from the same vehicle. Just make sure to get all the transmission harness and computer.

 

[Dogbrain]

I used my divorced transfer case to get overdrive. I used a case out of a road crane and ran the power through it backwards.

 

[laserjock]

I used my divorced transfer case to get overdrive. I used a case out of a road crane and ran the power through it backwards.

I always wondered about that. I guess with a real gear case you can get away with spinning it backwards. I guess it shouldn't care.

 

[Dogbrain]

Yes, it worked. Don't think I would do it that way again though, I had to fab a ton of stuff to make it work. Also that heavy of a transmission and transfer case are never going to be used to capacity in a pickup. When I do my next Cummins swap I am going to use a transmission and case out of a pickup.

 

[laserjock]

I would imagine it would be huge.

 

[Dogbrain]

Yep, had to delete front fuel tank to make room for it. I put a bronco tank in the rear to make up for it. Good part about it is I know ford trucks really well now. Had every bolt out of that truck at least twice.

 

[laserjock]

Yep, had to delete front fuel tank to make room for it. I put a bronco tank in the rear to make up for it. Good part about it is I know ford trucks really well now. Had every bolt out of that truck at least twice.

I feel you there.