Cummins Diesel 4BT Conversion - Fullsize Jeep Wagoneer

[hemi57]

I am so jealous!!! I have a 2006 Rubicon Unlimited and now that I've lifted it, added 33X12.5 tires, a tire carrier rear bumper, winch and custom front bumper, etc. The weight of my rig is now off the charts and the anemic 4.0L I6 just doesn't have the balls to make the beast move very well. I need a Cummings 4BT or a serious diff gear upgrade. Would prefer the diesel swap.

[dozerrod]

Love the clean look of the engine compartment -- VERY nice!

[neurocytohemotoxic]

Was the conversion hard?

[WillysJeeper]

The 4BT is mated to a Dodge 3spd Auto from an early 5.9 Cummins powered Ram. I was going to combine the Dodge TF727 with the Jeep TF727 but did not want to have a bastardized transmission in case it broke down far away from home. The original T-case is bolted to the transmission, bet relocated back a few inches. A custom crossmember was fabricated to deal with the large pedestal mount on the Dodge transmission. A 90 degree drive was used on the speedo cable as well.

[SuperDutyCummins]

@WillysJeeper is that cummins isx red??if not what is it and where did u buy it>>

[WillysJeeper]

@SuperDutyCummins It is actually International Harvester Red from Carquest. I was shooting for the ISX "look" I may get some shiny valve covers to add a few more horsepower :) I'll be putting this setup to the test this July, hauling my 31' Airstream around the north end of Lake Superior from Southern Ontario. I'll try to add a few video clips.

[Goldenrod636]

Does this have a chime or a buzzer?

[1930aa]

There's a bunch of us with the same wagon/ truck that also want to do the only thing that gives mileage but leaves power. Yah can't tease us with this great solution without some tech answers! What trans? Is there an adapter? What did you need to do to the truck to handle the extra weight? Tcase to trans? Your fans have a right to know! :)

[caniwitech]

That's no '89 grill!!!!! Beautiful truck, i love the engine swap!!!

[welditup85]

Hey how does the 4bt pull this thing around? I would love to have a old FSJ with a 4BT or 6BT. I was afraid the the 4BT is to small and might be underpowered.

[mountainman28713]

did you get to keep the air conditioner? I did not see it if you did. A/c is a must for me, I have two children and a wife to travel with me. I would like more info if possible on the swap. I am an FSJ fan, and I love the cummins engines. Thank you.

[Seattlecarnut]

Wow! It looks like there's enough room under there to fit two of those engines. Or at least one 4BT and a smaller engine.

[WillysJeeper]

The best average combined driving has been 22 MPG. I have not done much toying with the injection pump as of yet. It is a huge improvement over the 360 though. I will be adding a fuel heating system and filtration to run waste veggie oil in the spring.

[Wildfowler85]

Good work on the swap. Looks super clean, like it rolled out of the factory with that motor in it.

[lothar7572089]

Cool swap! I've been considering a 4BT swap, but haven't worked out the details. Have you been able to get any fuel economy numbers with it yet?