Is the NP231 transfer case compatible with another jeep?
NP231 compatibility comes up from time to time and rarely can anyone say with confidence that an NP231 from one model and year will be a direct replacement for another model and year. The best bet is to stick with same model, year, and transmission unless you are prepared to swap the input shaft.
What kind of transfer case does a Jeep Wrangler use?
The new TJ Wrangler continues to use the NP231, but the NP231 used in the TJ has a different tail housing that allows the removal of the drive shaft with out losing transfer case fluid. Both versions of the NP231 used in the Wranglers have an over all length that is long for a short wheel base vehicle.
What is the range of the Jeep 231 transfer case?
The 231 has a driver’s side front output and centerline rear output. The NP231 features two ranges; a low range gear that is a respectable 2.72-to-1 (the lowest of all the Jeep transfer cases with the exception of the NP241OR) and a direct-drive in high range.
Can a Jeep model 231 be rebuilt without lubricant?
Unless you own a TJ model 231, you will rapidly lose the ATF lubricant from the case if this occurs. The 231 is possibly the simplest of all the Jeep transfer cases to rebuild. Their assembly is intuitive, and parts are easily available and affordable.
When was the Jeep NP 231 transfer case introduced?
The Jeep NP 231 transfer case was introduced in the 1988 model year. Jeep’s YJ Wrangler and the XJ / MJ Cherokees with the Command Trac option were the first models to feature it.
The new TJ Wrangler continues to use the NP231, but the NP231 used in the TJ has a different tail housing that allows the removal of the drive shaft with out losing transfer case fluid. Both versions of the NP231 used in the Wranglers have an over all length that is long for a short wheel base vehicle.
What is the part number for a 231j transfer case?
This tag indicates a 231J transfer case, with a part number of 52099211, a build date of 6-21-99 and a gear ratio of 2.72:1. Early NP231’s on Jeeps with a vacuum front axle disconnect feature (as is usually evident by the presence of a vacuum switch on the NP231) did not have a true neutral disconnect when shifted into neutral.
Unless you own a TJ model 231, you will rapidly lose the ATF lubricant from the case if this occurs. The 231 is possibly the simplest of all the Jeep transfer cases to rebuild. Their assembly is intuitive, and parts are easily available and affordable.