What does NP231 mean?
Posts: 15,860. Re: NP231? what does this part-time stuff mean? It means you should only use the 4wd on surfaces where it can get wheel slipage. If you run it in 4wd on dry cement or asphalt, it causes binding and can cause breakage in the drivetrain.
What fluid is in NP231?
Jeep recommends 2 Quarts of ATF+3 (Or ATF+4) Fluid in the NP231 Transfer Case that comes on your Jeep Vehicle.
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.
Is the NP231 speedometer gears interchangeable in jeeps?
NP231 speedometer gears are interchangeable to correct for tire size and axle ratio changes. See this page to learn more about this. The 231 appears to have reached the end of its main production in Jeeps in 2006. However, expect it to be well supported by the aftermarket for decades to come.
What kind of differential does a jeep NP228 use?
The NP228 uses an open differential for its front/rear power split in 4WD Fulltime High, the NP229 uses viscous coupling for its front/rear split in 4WD Fulltime High. Both lock the front/rear output shafts in 4 wheel drive in Low range.
When was the NP 207 used in Jeep Wrangler?
Thankfully the NP 207 was installed behind some of the weakest Jeep power trains every used. It featured a 2.60:1 low range and a straight through design high range, but featured a driver side front output. It was used in one year of the Jeep YJ Wrangler in 1987, and in the early XJ Cherokee ‘s from 1984-1987.”
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.
NP231 speedometer gears are interchangeable to correct for tire size and axle ratio changes. See this page to learn more about this. The 231 appears to have reached the end of its main production in Jeeps in 2006. However, expect it to be well supported by the aftermarket for decades to come.
What is the gear ratio of a NP231?
This unit was utilized beginning in 1992. The NP231 was manufactured with left side drop output and has a low gear ratio of 2.72 to 1. This unit has 2WD and 4wd, combination of 2 high, 4 high, neutral and 4 low. The unit has a 27 spline front output and utilizes a rear slip yoke.
What kind of transmission does a GMC NP231 have?
The NP231 was manufactured with left side drop output and has a low gear ratio of 2.72 to 1. This unit has 2WD and 4wd, combination of 2 high, 4 high, neutral and 4 low. The unit has a 27 spline front output and utilizes a rear slip yoke. The NP231 was offered in Chevrolet, Dodge, GMC and Jeep.