np 231

I recently rebuilt a Tera low 4:1 np231 kit, including machining new helical gears, rebuilding the planetary cage upgrading bushings to needle bearings, etc. The end product is essentially a brand new tera low kit minus the minimal wear items like the inner gear and input shaft. My question is...

Hello, I currently am having problems with my NP231, it started around 2 months ago with a clicking noise while coasting in the Jeep, then it became very bad driveline vibrations last weekend, when I inspected I noticed that the rear driveshaft U-Joints are bad and had partially damaged the...

Hi Friends, I've been installing the Rugged Ridge Mega Short SYE kit on my '99 TJ today (NP231 transfer case). Everything has been going well, until I got to the tone ring installation for the magnetic speed sensor. I should note that I have the instructions and have read them, however they...

Parting out a 1993 Jeep XJ. Main stuff 4.0 HO ax15 5 speed 231 tcase. HP Dana front Chrysler 8 rear Interior still complete will post pictures soon.

Is there any difference between a NP 231j T-case that was mated to either a Automatic or Standard trans? Both behind a 6cylinder and same year TJ, 06. I was thinking about buying a T-case ( I found one for $100) and doing a sye and any other maintenance on it and when all complete throw it in...

Boyfriend bought a 99 wrangler tj 6L manual transmission First the rear end went out. After getting it back the transfer case blew up. I cant figure out which transfer case we need. Heres what info I have. Model # 231 J Assy # 5209 9211 Serial # 7 24 98 2 Ratio # 272 Help?? I can't seem to...