Just finished my 4bt swap a week ago.been working on this project since thanksgiving. Thought I'd share the build on the forum. Here are just a few pictures from beginning to end. And also a short list of the major upgrades:
I found the motor out of a recently rebuilt bread truck. And going the 4bt route everything fit well and smooth. If I had to make a rough guess. I'd say it was around five grand with lift included. But all the work was done privately.
That's not bad I'd do the swap myself if I was gonna, I do fabrication and powersports repair.
I just hate the fact the 4 is more than the 6. A wrangler would never hold a 6 without some serious mods it is a 4bt and a half plus the torque would probably tear those small danas apart.
Nice work tho.
What did you put behind it for a trans?
I just used an ax-15 trans. And I am currently running stock axels. But I plan to swap those out later on. For just highway use they are fine. I wouldn't want to do anything serious as it is now though. Drive shafts need to be upgraded soon also. Here's another picture taken today.
So fricken jealous! This would be my dream! So if it cost you roughy $5000, any estimate on what it might cost me to have a shop do the work? I have 0 knowledge of engines or any of that. I'm just so curious about this swap
As far as gas mileage. I'm getting 20 right now. Which is awesome for a lifted jeep. After I re gear should get around 25 or so. There is literally not a hill 5th won't pull. And I have no clue about getting a shop to do it. I know jdjeeps does it. And I know bruiser conversions does it. But I'm sure the price is very very High. Tons of custom work and unique pieces needed. Plus a lot of hours.
I did not do anything to the frame. And I do not see where it would need it. The jeep is light enough that the whole thing can flex under pressure and the frame is not under a lot of stress.
Awesome jeep man, your my hero! Would a non turbo 4b be worth the swap in your opinion? I have access to a free one out of a old case skid steer. This has been a dream of mine for a long time, such a reliable strong motor it's not even funny. Always starts right up even when the weather is in the single digits, it's logged over 9k hours and still going strong, the rest of the machine not so much.
Thanks. I do think it could be worth it even without the turbo. But I know if I was going to put in the time and money Into it. I would go ahead and add the turbo. I've only heard of one guy who did it without the turbo. But from what I heard he was still happy with it.
This is what I want to do to my YJ but I'd need a new JK 6-speed to replace the original 5-speed and also a new transfer case, driveshaft, and diffs to handle the massive torque output.
You can really do without upgrading all of the driveline as long as you are not gonna wheel it hard. I plan to build up the drive line little bits at a time but for now everything works fine.
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