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4bt build.

4btjeep

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ok so this is with the start of the project. 1997 grand cherokee with the 4.0 high output in it. (don't think it came like that) but its what i got.

plan 3:55 or 3:08 rears 4bt cummins 5spd manual trans and high 20's mpg

The start


(will not allow for pic upload)
 

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4btjeep

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I am using a 5 spd because I have one around, and I have issues driving an automatic. I have a 6spd but i am saving that for a truck that will be pulling a trailer more. both my current trucks have a 5spd and i have no issues unless pulling. In the jeep, I won't be pulling, and it is a considerably lighter vehicle so i am using that.
 

WyoJeepin

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Until I got this truck all my other vehicles have been manual. I have been driving big trucks for the last 8 years for a living, so I kinda like not having to row the gears. Several of the trucks I have driven had 2 transmissions, 15spd main and 4spd auxiliary.
 

4btjeep

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I wanted to do a 2spd rear on my fummins.
 

4btjeep

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well i got the parts, never did it dad killed it he is hell bent on fixin' it
 

4btjeep

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he fixes it, he can keep it, i don't want a half assed repair i am constently fixing again, and its a bit of a tetanus bucket. the rust is beginning to accelerate its assault upon the truck. i give it stage 2 cancer as of the moment. Terminal if not surgically removed IMMEDIATELY! If not, it will be too far gone. 2 cab mounts rusted out already plus other
 

4btjeep

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Thats why dads got the fummins now. he killed it, he wants to fix it, and I had some fun with her. he can take on the Cancer issue there. I was going to learn more from it, find a rust free truck and do it again!
 

4btjeep

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here is your update
and as far as I have gotten in the past couple months followed a change of plans and am using an allison auto i obtained at work today attached to another 4BT ($750) i aint going to complain about it. i have to find a tfer case for it and make driveshafts, but not the end of the world.

and here Trans and tfer case have been dropped since.
 

4btjeep

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The combo had 10k miles on trans rebuild, and 160k on the motor. was in a grummen bread truck
 

WyoJeepin

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Can't wait to see the proper color of smoke come outa that thing, what it should have been from the factory!
 

4btjeep

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I will actually stick to not rolling coal with it. I have 2 diesels that do not roll coal at all, and still hold their own pulling. The jeep is all about economy, so coal=unburnt fuel= failure I shall not fail! lol I may tune it to roll some for a few pictures and such, but for the most part want to keep it kinda low power as boxing the frame is not in the plans as of the moment. I may become in the plans if it flexes too much.
 

4btjeep

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my current 2 only do, when its cold. though the 97, will roll some soon, kinda hard to prevent with some of the upgrades for it