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gingerbreadman1 07-18-2013 02:17 PM

ZJ cummins swap?!
ok i want to do a cummins swap in the near future (after i get a job) so i need to start looking now for parts and engines. does anyone know what year/model is best for my 95 zj 4.0L? i have a dana34 in the front and a ford8.8 in the rear and tom woods driveshafts. i dont know what i need to change in order to support the new engine and the torque. i want to change my front no matter what because its the 3 piece and i want to jump this girl without snapping an axle. just throw out some ideas if u can.

zj97ltd 07-18-2013 02:20 PM

If you do an online search there's a couple ZJ's floating around with Cummins 4BT's in them. I think they come out of old Frito Lay trucks and such. I thought about it once or twice but it'd probably be cheaper and easier to put in a V10 out of a 3/4 ton Ram, and I still wouldn't want to do that.

JohnnyZJ 07-18-2013 02:25 PM

everything. change everything.

Jeeples 07-18-2013 03:16 PM

You want to jump the truck with a heavy *** diesel engine stuffed in the nose? Let me know how that works out for ya :laugh:

PolkaPower 07-18-2013 03:27 PM

This comes up about once a month

A lot of fab work

gingerbreadman1 07-18-2013 03:27 PM

Not like a 20 ft jump I meant like basic mudding trail jumps.

dnuccio 07-18-2013 03:44 PM

it can be done, but its ALOT of work. everything needs to be changed. fuel system, electronics, etc etc. if you get this project started, start a build thread. id love to watch it

LunaMoona 07-18-2013 03:50 PM

I'm not sure you realize just how much work would go into doing something like this.

JackedLaredo 07-18-2013 04:21 PM

I was once one of those 4BT dreamers too. I always thought, "heck yeah I want 30 mpg in a jacked up ZJ"....but you really have to weigh in the costs of the swap. Like people have said; you need to swap out fuel system, and electronics. A lot of fab work on the front end is needed as well. You could find a decent 5.2 or 5.9 for faction of the cost of a 4BT, and use the savings for gas money. Just my thoughts.

gingerbreadman1 07-20-2013 05:35 PM

Yes I understand. I'm making this my toy in a bit and I'm making a full crawler. Chopping the top and everything

zj97ltd 07-20-2013 06:23 PM

Just remember it's unibody. The more you cut the more you have to reinforce. If you pull this off it'll be sick.

gingerbreadman1 07-20-2013 06:44 PM

That's the same concept of what I want. Except a Cummins I'm her too

zj97ltd 07-20-2013 07:05 PM

Cool. With a Cummins it'll crawl all day at idle.

a70eliminator 07-21-2013 07:14 AM

Whatever you do DONT GOOGLE cummins swap when there are little eyes in the room!!!!!!!!!!!

gingerbreadman1 07-21-2013 06:41 PM


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