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  1. XJ Cherokee Technical Forum
    i was trying to look it up and see if there is any issues with using a TJ np231 shifter handle in an np231 xj transfer case I dont see why this wouldn't work with possible custom brackets made as I think the tj handle just look better and id like to use it as I'm in the process of converting my...
  2. XJ Cherokee Technical Forum
    I found a transfer case out of a '94 YJ and wanted to put it in my '99 XJ, well, I already put it in... unfortunately, the rear output shaft is a couple inches shorter and so when I went to test it out, it wasn't long before I heard the rear driveshaft fall to the ground. Do I have to take the...
  3. YJ Wrangler Technical Forum
    I've got a '91 automatic YJ with the TF999 3-speed and was thinking of swapping in a AW4 4-speed from an XJ. I can't find anything on how possible this swap would be. Everything I see talks about swapping from a manual YJ. Anyone have any ideas? From what I found both trans have 23 splines...
  4. Engines & Drivetrain
    I own a '06 TJ, 6 speed manual transmission. I had a SYE installed over a year ago and it fried something in my TC. I will need a replacement. To have a shop rebuild a new TC with a SYE will cost me a lot. Quadratec.com sells TCs with SYE kit already installed but only ones that fit the AX-15...
  5. YJ Wrangler Technical Forum
    I am junkyard hunting for a NP231. I have found several on automatic transmissions but my YJ is a standard. Will the NP231 from an automatic go onto a standard? If not is there a way to make it work?
  6. Engines & Drivetrain
    I have a 1995 Jeep Grand Cherokee with the 5.2 and the 249 transfer case. I'm in the process of swapping in a 242 case, but I want to make sure I get the right donor. The case is dated July 1994. Can anyone tell me based of the attached picture if this is the old or new style gear cut? I've read...
  7. YJ Wrangler Technical Forum
    I was hearing some slapping coming from under the seats in my jeep and i believe it was the transfer case drive chain that had stretched out and was hitting the side of the transfer case when i accelerated after i have shifted gears. I took it to a mechanic and they said pretty much the same...
  8. XJ Cherokee Technical Forum
    I got a 01' 5 speed Cherokee I am in the process of converting into a 4x4. The 2001 Cherokee will have a nv3550 transmission put into it for the conversion. I understand what I need and what parts are compatible for everything but the transfer case. Can I get the transfer case out of any Jeep...
  9. Engines & Drivetrain
    Hi Jeepforum. I have a 1995 Jeep YJ SOA, 33's, 5spd with 8.8 rear, NP231 w/ SYE. Recently when I have been doing light rock crawling I have been experiencing intermittent "Grinding" or "Scraping" metal noise whenever I hit a steep incline. The noise has only ever occurred when I am in 4Low...
  10. TJ Wrangler Technical Forum
    Does anyone have a source for the NP231 TC studs that bolt it to the tranny (AX15). I've searched everywhere I can imagine even specialty fastener shops with no luck. I just need one. I think I found one on Amazon, but I'm skeptical, and they want like $12 + shipping. :surprise:
  11. TJ Wrangler Technical Forum
    So haven't had a chance to do a lot of poking around yet, but I've got some issues going on with my NP231. When I throw it into 4 hi, there is quite a bit of gear noise, driving down the road. A lot of metallic whining. When I first heard it, I put it back into 2wd, but the gear whine would not...
  12. YJ Wrangler Technical Forum
    A video that might help you mod a Chevy transfer case to fit the stock jeep drive shaft. My setup: 1987 YJ with a Chevy 350 conversion mated to a 700r4 transmission with an NP231C front case half modded to a NP231J back case half. Hopefully this helps you see that running the complete Chevy...
  13. YJ Wrangler Technical Forum
    I've had a thought for a while about why I couldnt get my front driveshaft into my 92 yj mainly because there were just holes and were deep enough a u bolt couldnt get through there. I bought a np231 from a guy, however I now realize the front yoke is for a double cardan style joint. I dont have...
  14. YJ Wrangler Technical Forum
    Alright guys a bit over a year ago my YJ took a beating. U-joint failed and ripped the tcase and driveline apart when going 60mph. I haven't had the money all year to fix it until I sold a truck. So this poses a question, in my area(75 mile radius) there are only a few YJs are being parted out...
  15. TJ Wrangler Technical Forum
    i'm hoping this isn't a repeat thread/problem. here is my issue 32rh auto transmission (to the best of my mechanic's knowledge is in good working order) and np231 with SYE front drive shaft is pulled out in 2h- reverse grinds, jeep doesn't move, in drive, i get a dull thump, feels like gears...
  16. YJ Wrangler Technical Forum
    Just joined the forum a few days ago. You can see a pic of my 94 YJ 'Joop' in the registry, which I got in pieces recently (at least the engine, trans and T/C were in place). I towed it home on a u haul 2-wheel dolly. I was just going to haul her home with the T/C in neutral, but u haul said...
  17. ZJ Grand Cherokee Forum
    I got a NP231 transfer case on the cheap and the chain supposedly was slipping. I pulled it apart today and the bearings and case are practically new. But the Front output shaft gear and the drive sprocket gear are the ones in question. How do you go about checking if these are good? Without...
  18. YJ Wrangler Technical Forum
    Noticed a new noise with my 94 YJ driving to work today. Whenever I let off the gas or just coast there is a fairly loud clunking noise. I just replaced the rear end with an 8.8 and I jacked it up and there is no noticeable noise from that. So I'm guessing it is the transfer case? bought used...
  19. Full Size Jeep Forum
    Hello everyone, I am wanting to convert my 84 GW into a manual tranny. What would be the best combo to use for this? I have a drivers side drop and would prefer not to have to change the front axel. I was thinking NV4500/NP231. Not sure if this is even possible. If you have done this, know...
  20. XJ Cherokee Technical Forum
    Hi guys, About a week ago I replaced the drive chain in my NP231 t-case (in a '96 XJ) and all seemed to go well. Yesterday though I noticed smoke coming from the undercarriage after driving it for several miles, and the smoke smelled like ATF. Looking underneath, I found that a HUGE amount of...
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