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Topic Review (Newest First)
10-31-2013 11:33 PM
petercass88 Adapting the T18 & T19 Transmissions to Jeep NP/NVG Transfer Cases

Seems pretty straight forward to get the adapter kit from novak for the borg warner t19 4 speed manual that the 4bt would come with to mate it up to the np231 transfer case.
10-31-2013 10:51 PM
petercass88 Dang what are the numbers on the 6.2 chevy? Id be happy with a 4bt or a mercedes 5 cyl. Honestly I am gonna lean toward a mercedes TD if the 4BT doesn't work out because a new 4BT can be pretty pricey when all is said and done. 260 foot pounds of torque would make me a happy guy considering I have 4.88 gears and wanna end up with 37s. I wish I could hold 70 MPH on the highway with the 4banger since thats the speed limit down here in FL. It rides really smooth on the highway with the current 33s so im comfortable with it.
10-31-2013 10:32 PM
caraudiochef I have a chevy 6.2 diesel in my yj... I'm almost done with it (finally road ready). There really wasn't anything to crazy to consider "custom". It was pretty much like a normal chevy gas v8 swap. Trans mount, drive shaft, wiring, motor mounts, ect..
10-31-2013 10:09 PM
Wombat Ranger ^^ No offense bud, with the questions you are asking you have about 40 hours of reading to do on the topic before you should even think about making a decision. Start with the link I posted below.


Www.4btswaps.com
10-31-2013 10:00 PM
UberJeep am I reading all of this right? It is possible to put a diesel in a YJ? Is pretty straight forward or is this something requires custom stuff? What about emissions, like in California? I commute daily and I'd love to have the mileage from a diesel. Is it worth it? If this is simple to do, I'll do it.
10-31-2013 09:42 PM
petercass88 Awesome thank you for the input guys! It will probably be a summer or next winter project so I will bookmark this thread and post more as I do more research. This guy pulls them from box trucks so it isnt an exploding offer so im in no rush. My rear main on my 4 banger has sprung a very very light leak so I figured I might have another year left before I do the swap and let someone else rebuild my 4 banger.
10-31-2013 01:23 AM
Wombat Ranger Those are good deals. For your application I would personally not spend the extra money for a p-pumped motor (if you were thinking about it). The "less desirable" VE pump actually has some advantages over a p-pump, and unless you are building for all out power and max fuel (you're not) they tend to drive nicer.
10-30-2013 11:19 PM
cosmokramer
Quote:
Originally Posted by petercass88 View Post
Hey guys I think I found a good lead on a 4bt. It comes with a 4 speed manual trans but I wish I could stick to 5 speed manual trans. Any thoughts? What kind of adapter do I need to mate it to the transfer case? Bigtime newb in this regard... just contemplating my next project... over 200 ft/lbs of torque sound amazing right about now for driving on the road since right now i have the 4 banger. lol Just got a fresh batch of cummins 4bt swaps!
Good price for the 4bt. I couldn't find them for that price a few years ago when I looked. Start with Novak adapters. They have adapters for almost everything you can think of. They have a lot of info online, but a call maybe your best bet. I know from other forums people have done the 4bt to ax15 with different bell housings and Novak adapters. Post what you find out.
10-30-2013 08:57 AM
petercass88 Hey guys I think I found a good lead on a 4bt. It comes with a 4 speed manual trans but I wish I could stick to 5 speed manual trans. Any thoughts? What kind of adapter do I need to mate it to the transfer case? Bigtime newb in this regard... just contemplating my next project... over 200 ft/lbs of torque sound amazing right about now for driving on the road since right now i have the 4 banger. lol

Just got a fresh batch of cummins 4bt swaps!
10-28-2013 12:14 PM
yjmuskogee
Quote:
Originally Posted by 87YJnTX View Post
unfortunately yet again my diesel conversion was delayed.....for a good reason though. I am in a custody battle for my 5 year old, hoping to get it started by spring.
Good luck on the custody battle
10-27-2013 11:35 PM
87YJnTX unfortunately yet again my diesel conversion was delayed.....for a good reason though. I am in a custody battle for my 5 year old, hoping to get it started by spring.
10-27-2013 10:06 PM
Natdog Im lookin forward to doin a 4bt swap in my yj, cant wait to do it, just need another vehicle to drive while i work on the yj.
10-27-2013 02:56 PM
cosmokramer I have the 5 cyl 3.0L mercedes, 4.56 gears, 35's, 3 speed auto, and I drive over some mountains every few weeks. I'm lifted SOA + springs and shackles so it's a brick. However, I get about 21-24 mpg on diesel, which I don't think is too bad, but I don't tow anything, and hardly wheel off road. I hear the 4bt guys can get 28-30 for commuters.
10-24-2013 02:55 AM
OregonPlinker What kind of fuel mileage do you guys get with those diesel engines? I sure love diesel power in my tow rigs. I wanted to put my 5.9 cummins in my yj when I wrecked the truck but thought it might be a little too much weight and power to keep the jeep as an all purpose rig.
10-23-2013 11:44 PM
cosmokramer Don't know if anyone is still reading this thread, but after mining the internet for tachometer solutions on the mercedes diesel, I bought tiny tach. It's made in the USA, and they make a version to work on any diesel by clamping onto a metal fuel injector line. It reads the tiny changes in diameter of the line as fuel goes through.

In any case, the transducer to order for the mercedes 5cyl is the 6mm one. It will work with any diesel but you have to check what size your injector lines.

It was simple, clamp the transducer onto the injector line, connect the wire to transducer, ground to a grounding bolt, and then power to any 12v source. I plugged into the radio power lines as this would turn it on only when the car was on with the key in. No adjustments, no calibrating, it read immediately. I compared it to the numbers I expected from a gear ratio calculator and it was spot on.

Good luck to anyone doing this conversion.
08-21-2013 11:41 AM
LeonidasDieselYJ
Quote:
Originally Posted by caraudiochef View Post
I'm almost done with my conversion to a chevy diesel 6.2. It was pretty straight foward much like a normal chevy v8 swap. 6.2 diesel/ th400 trans / chevy&dodge 208 tcase, dana 44s front and rear
What vehicle are you swapping that into I'm working on a parts list for my diesel conversion, I'm planning on a 3.9 cummins.
08-06-2013 04:53 AM
87YJnTX its all flat land here, a hour east of Houston tx. tallest hill we have is a overpass.
08-05-2013 08:33 PM
cosmokramer Spent some more time with the jeep, drove it from San Diego to LA today. It can cruise at 70 without an issue, but with a constant grade up a mountain, mashing the pedal, I slowed down to about 60. So with my current gears and tires with this engine, that's what I'm running. For what I will be using it for, it will be fine. If you are doing longer commutes through mountainous areas, probably a better gear/tire ratio would be better.
08-05-2013 04:39 AM
87YJnTX wow.....lots of good info there thanks !!!! I will be looking into it more.
08-04-2013 08:18 PM
cosmokramer By the way, with 35's and this engine, 4.10 gears are about perfect, decent acceleration and can handle highway speeds without an issue. With 33's or smaller, stock gear ratio would be good.
08-04-2013 07:30 PM
cosmokramer I'm still learning about these YJs, I am a former JK owner.

My current set up is also spring over axel, which gives clearance for the oil pan to the front differential. With the OM617, I believe you can get a dry sump oil set up or shallow oil pan, but running SOA solves the issue.

The last owner used it as a daily driver and converted it to burn waste veggie oil. Right now, I'm just running off of the diesel tank. I will redo the hoses and flush the system (it had been sitting for a year) before either running biodiesel or going back to waste veggie oil if I can find a consistent source and time to filter.

Search craigslist/junk yards and see if you can find a running parts car. If you decide to go with the Mercedes, search you tube for mercedessource, the guy goes through a lot of good maintenance and checks on the old diesels. I used the information I learned there to check out the turbo and engine before buying, and then change the oil and fuel filters after getting the jeep.

In talking to the previous owner who built it, he used hydraulic motor mounts to cut down the vibration, used a prefabbed adapter for the motor to the trans (don't know which company), SOA for oil pan clearance, and did all the usual changes that go along with SOA, brake lines, driveshaft, steering etc.

Good luck.
08-04-2013 04:22 PM
87YJnTX sounds like your setup and need is just like mine. im running SOA and want it as a daily driver. I have land in the woods I will be moving to next year and mostly just running around there with it besides to/from work
08-03-2013 11:33 PM
cosmokramer I know this is an old thread, but I just got my hands on a diesel YJ. 89, 3 speed auto. Mercedes 5 cylinder turbo. Bomb proof from what I can research and see. Adapters available, cheaper than 4 bt, and possibly cheaper than the 1.9 VW, but I also didn't put it together myself.

Numbers wise it'll lose to the 4.0 HO, but in person I can say it has good torque, can pull up hills, is a good daily driver, which is what I need. Mine has a 5" lift, 35" tires, don't know about mileage just yet.
06-11-2013 02:32 PM
caraudiochef I'm almost done with my conversion to a chevy diesel 6.2. It was pretty straight foward much like a normal chevy v8 swap. 6.2 diesel/ th400 trans / chevy&dodge 208 tcase, dana 44s front and rear
06-11-2013 01:10 PM
87YJnTX
anyone here have a diesel ?

if ya have a diesel......what size and how do you like it ? Im torn between the VW 1.9 which would be enough power for what I do, and the 3.9 please include rough guess of mileage , tire size etc etc

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