Cummins 4BT & Diesel Conversions Forums banner


  1. Jeep CJ7 tachometer

    Cummins Tech Section
    Need some help. I’ve got a 1987 4BT in my 84 CJ7 which came factory with a tach, that I’d like to keep. Will I need a new tach? If not how do I wire this one up? My mechanic mentioned something about Autometer selling something to attach to the alternator but he wasn’t very sure. Any help is...
  2. 81 Jeep CJ8 Scrambler build

    Vehicles For Sale
    Life got really busy for me and I enjoy spending time with my 4 wonderful children more than tinkering on my project. It's been 5 years since I have made any progress so at this time, I would rather have the space back in my garage. Therefore I am selling a Jeep build project, here are the...
  3. JEEP YJ, CJ and TJ and Universal 4BT Engine Mounts!!

    Vendor Showcase
    FarmStrongInc If you are looking for quality American made off road parts and custom fabrication services at a reasonable price, you have come to the right place! Farm Strong Inc. was founded by a hard working American guy who is committed to providing quality products backed by friendly...
  4. 1998 Jeep Grand Cherokee 4bt Swap

    Other Engine Swaps
    I wanted to look into swapping the 4.0l i6 engine in my 1998 Jeep grand cherokee for a 4bt cummins engine.... I already did a 42re to 44re trans swap, would i need to buy a new trans or just get a different bell housing for my current trans? I would obviously want to look into getting bigger...
  5. Sold!!!! Selling my 4bt

    General Classifieds
    Looking to sell my 4bt setup that is in my Jeep. Located in North Central Indiana. It is a VE pump 4bt. about 9000 miles on fresh rebuild. Engine is still in jeep coupled with a custom aluminum CNC GM bell housing adapter with the GM Manual flywheel. Transmission is a Jeep AX-15 with a Novak...
  6. OM617 to 99 TJ Wrangle HELP!

    Mercedes OM617 & Variants
    Hello everyone, I'm new here for now but am in the process of creating a build thread for my 1999 TJ Wrangler I'm swapping an om617 mercedes diesel into. I have all the pictures together and description but wont be posting until it's complete. Anywho, I am stuck right now though.. When I...
  7. jeep yj 4bt swap

    General Discussion
    Hi guys I'm about to start my yj diesel swap, I've been researching steady for a few weeks and I've come up with some questions that I just can't seem to answer. 1.) How do I tackle the fuel system? (Can I use the stock tank?, what kind of pump do I need? And with fuel lines should I use...
  8. 1974 CJ5 with 4BD1A Converstion and Fiberglass Body

    General Classifieds
    Hi Everyone, I have a Lifted 1974 CJ5 with a 4BD1A engine for sale. This baby has roughly 80k miles on it with a fiberglass body, zero rust and includes a 6' Western Plow and 5 almost new 33" x 12.5" Micky Thompson Baja Radials. 4wd works great, glow plugs installed in the motor for cold...
  9. Jeep TJ Exhaust Thoughts

    General Discussion
    Well i have spent some time looking at different threads and seen people quick little thoughts and exhaust designs, but i was thinking... What would it look like to run a stack through my hood..? Is this even a feasible option? It seems like it would be a good idea for a rock crawling rig...
  10. 4BT Swap into my 2000 Jeep TJ

    Buildup Showcase Threads - All Engines, Vehicles
    I just wanted to start this thread and say hey, I am new here so bear with me haha! I have started gathering my parts this month for the swap and I hope to start the project this December. I am excited this will be my first engine swap ever and I have been educating myself like crazy. If anyone...
  11. AX-15 transmission

    General Classifieds
    AX-15 5 speed Transmission out of a 1995 Cherokee. Asking $300 for best reasonable offer. Include phone number and offers in a PM. Thanks for looking.
  12. 1997 Jeep TJ gets a 4BT

    Buildup Showcase Threads - All Engines, Vehicles
    Ill start my build with a few pic's of the Jonesy's Off Road accessory mount
  13. 4bt cummins

    Want to Buy
    Hey guys new here and looking to buy a 4bt cummins that runs to swap into a jeep. I live in georgia and hoping to find one close if possible would rather pick up then ship. Looking to buy around march!! just want to know whats out there.
  14. i need help before i start the 4bt swap into my cj7

    General Discussion
    Im restoring an 1983 cj7 jeep and i have been wanting to put the cummins 4bt in it. Right now my jeep has a strait 4 with dana 300 transfer case, amc 20 rear axle, and i think a dana 30 front axle. so i know that i will have to up grade my axles but what else do i need to upgrade? oh and i will...
  15. JEEP JKU 4BT swap

    General Discussion
    hi all !! i am joining after i just blew the engine (spun the rear main crank bearing and in turn threw the rod and damaged the block .... i wasnt even off road!) in my jku and need to get advice on doing a 4bt swap cause i figure if im going to put out the money for a new motor im going to get...
  16. XJ Tachometer Input

    General Discussion
    So, I'm just about finished pouting about my XJ, and mostly convinced NOT to do another OM617a. I am also convinced that decent, somewhat inexpensive, used B3.3Ts do not exist in my section of reality. That leaves me with the 4BT as the next best option to replace my OM617. Having gone through...
  17. 97 Grand Cherokee Laredo 4BT Conversion

    Buildup Showcase Threads - All Engines, Vehicles
    New to the forum, wanted to post my project on here as well as my plans for it in hopes for some feedback and pointers. I have been researching this site for the past week or so trying to gain as much information and knowledge as I can before posting and asking questions that possibly could be...
  18. NEED INFO please help

    General Discussion
    I want to put a 4 bt in my 95 yj i have T 19 and a np 203/205 doubler GM 14 bolt for the rear and 10 bolt up front already i am in need of info on the 4bt where to find them the differances in the types of 4bt what i should look for for my situation and any advice anyone might have thank...
  19. 4 BT Custom designed motor mounts

    General Classifieds
    Fellas, Let me introduce myself, my name is TJ Legel, I graduated Penn State with an MET degree in May. For my senior project I designed motor mounts for a 4bt into a Jeep YJ swap. My swap Thread can be seen below...
  20. Jeep YJ 4bta

    Buildup Showcase Threads - All Engines, Vehicles
    Hello all, So i know this isn't the ideal build thread seeing that i have completed it almost a year ago, but i feel i have knowledge now that i can share with others, so i will do a write up. Currently i have the 4bt in my jeep yj with the ax-15 np231 and dana 35 rear, dana 30 front. I am more...