FJ 60 duramax/allison (1 Viewer)

[iaintscared1969]

Know anyone thats done this yet. I have done the 350's and am looking for a challenge. Think this would be a good one. Getting spec's on engine and tranny dimensions. Coil over is already in the start phase.

 

[calfj60]

sounds like quite a project....other than that I am no help...

 

[Tapage]

Interesting proyect .. there are few 4BT and 6BT in the way but I thought no Duramax !

 

[pirateslair]

Get ready to beef up to a dana 60 or better. My buddy did the cummins trade into his suburban and went through two front axles. Heavy heavy.

 

[scouthead]

That is going to be one hell of a squeze! The duramax won't even fit into a normal chevy truck! I am pretty sure the front end of the duramax trucks were designed around the Duramax motor (and cooling systems). I know the core supports are completely different, and they have a gargantuan radiator...I saw an article in 4-Wheeler a year or two back where a guy shoe horned one into a 2002 or 2003 Suburban. Even going into the suburban required body lifts, frame surgery, lots of custom computer programming, some pretty major fabbing (and $$$$$$$). If it were me I would look into a more common swap...but it would be fawking awesome if you could pull it off!

 

[Sputnik40]

My 2003 GMC 2500 Duramax is awesome - pulls my trailer/40 at 80 in the mountains on cruise control - and even under mild accelleration the rear tires tend to slip. A friend has an 02 with a programmer and close to 35" tires and it screams.

Just from driving this and my 40 daily - when you proposed this I got images of axles exploding - pinions, whole diffs, shafts - can only assume you're going to 60's...

Can't wait to see this happen!

 

[Waggoner5]

It will fit. I stripped down a Duramax to the basic engine turbo system and its really not all that big. Its smaller than my 502 by far. The issue will be the Allisons size, adaptation, and the intercooler. The cooler is a big part of the power the duramax makes and it is HUGE. The Allison possibly could be replaced by the 4L80E. I did some measuring and it appears that this tranny is similar in bolt pattern with the Allison bellhousing adapter still on the engine. I really like the Allison, but I could easily live with the 4L80E. It would live fine in a Cruiser and can be easily adapted to the splitcase. Also the engine ECU is designed to co habitat with a body computer. There is no need to have the body computer, but I haven't found anyone who knows how to get into one and figure out what can be bypassed. The amount of wiring is huge also, but it could be done.