Is 231 Transfer Case Good?
The New Process 231 transfer case is one of the most common and durable transfer cases ever produced. Found under Jeep Wranglers, Jeep Cherokees, Dodge Rams, and Chevy S-10 Blazers and pickups, the NP231 has proved itself reliable under some of the most hardcore rigs.
What is a NP231 transfer case?
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. It features three modes; two-wheel-drive, four-wheel-drive and neutral – for a factory combination of 2H, 4H, N, 4L.
Are all 231 transfer cases the same?
Transfer Case Teardown
If you find an NP231 under your vehicle, it will likely have a “J” (Jeep), “C” (Chevy), or “D” (Dodge) after the numbers. All of the versions of the 231 T-case can be improved, but some are stronger than others, and some have better qualities than others.
How much torque can a NP231 handle?
According to New Venture Gear, the torque rating of the 231’s three-pinion gearset is 600 lb-ft, and the 241’s six-pinion set can handle up to 1,400 lb-ft.
Whats better 231 or 242?
Down and dirty the 231 is slightly stronger, has more aftermarket upgrades available and is probably more suited to the hard-core Jeeper types. The 242 has everything the 231 has PLUS Full-time, on the road, All Wheel Drive.
How many spline is a NP231?
The 231 comes in 21 spline and 23 spline versions with long, medium (rare) and short variations. The long shafts protrude 2.1″ from the front mounting face of the transfer case.
What vehicles have a NP231 transfer case?
Since 1988, the NP231 has been the “Command Trac” transfer case used in the XJ Cherokee, MJ Comanche, and YJ Wrangler. It has been the “Command Trac” transfer case in the ZJ Grand Cherokee since its introduction.
Which transfer case is better 231 or 242?
Which Jeep transfer case is best?
Top Jeep Transfer Case Swaps
- NP205.
- NP241OR.
- Advanced Adapters Atlas II.
- JB Conversions Lo-Max 205.
- Dana 300.
- Stak 4×4 Monster Box.
- Hi Impact.
- NP242.
What is the difference between 231 and 242 transfer case?
The difference is that the 242 has an extra differential component to it. The 231 forces the front and rear tires must turn at the same speed. Bad for dry surfaces.
What transfer case is in a Jeep TJ?
NP231
Since 1988, the NP231 has been the Command Trac transfer case used in Cherokees (XJ), Comanches (MJ), and Wranglers (YJ). It has been the Command Trac transfer case in the Grand Cherokee (ZJ) since it… The new Wrangler (TJ) continues to use the NP231.
How do I identify my Jeep transfer case?
The easiest way to identify the transfer case input is by identifying the stock transmission that Jeep used. The 21 and 23 splined output shafts vary on different transmission models. The AX15 transmission is always 23 spline shaft and extends 1/2″ beyond the face of the transmission.
How strong is a Dana 300 transfer case?
Broken cases or other components are only very rarely seen. The 300 uses all helically cut gears. It uses a large 1.25″ intermediate shaft. The Dana 300 is strong enough from the factory to handle even the most potent engines and situations.
What transfer case is in a Jeep JK?
Jeep introduced the NP 241OR RockTrac transfer case in the Rubicon package in the TJ (and continued it in JK) Jeep Wrangler. The NP241OR has a 4:1 low gear ratio acheived through planetary reduction.
What vehicles have NP241 transfer case?
The NP241 transfer case was in service from 1989-1999. It features an aluminum casing and is driven by a chain. It is a popular model, being found in numerous applications including the Chevrolet Blazer, Suburban, and Tahoe, as well as the 1500, 2500, 3500, and Van.
How do I know if I have a NP231 or NP242?
There are quite a few differences between the NP231 and the NP242 cases as they are completely different models. The first number is the number of ratios or ranges. Both are a 2 indicating a low range and high range. The second number is the torque rating scale.
How much HP can a Dana 300 handle?
350 horsepower
Worthy believes that a stock Dana 300 can easily handle power ratings up to 350 horsepower and 350 lb-ft of torque, while Novak says they regularly see them handling big-block power and deep compound gearing without failure.
What vehicles came with a Dana 300?
The Dana 300 is found in 1980-1986 Jeep vehicles. It is one of the most respected transfer cases and is regarded as the gold standard by casual Jeepers up through the enthusiasts. While only provided in 1/4 Ton rated Jeeps, its strength surpasses this duty.
What fluid goes in a NP241 transfer case?
| CHRYSLER / DODGE TRANSFER CASES | |
|---|---|
| Transfer Case Model | Fluid Type |
| NP241 | ATF (Dexron III or higher) |
| NP242 | ATF (Dexron III or higher) |
| NP243 | ATF (Dexron III or higher) |
What transfer case is in a TJ Rubicon?
NP 241OR RockTrac transfer case
NP241OR. Jeep introduced the NP 241OR RockTrac transfer case in the Rubicon package in the TJ (and continued it in JK) Jeep Wrangler.
What is NP242?
The NP242 may be the most versatile T-case ever installed in a Jeep. It has 2WD, full-time 4WD, part-time 4WD, and 4WD low range. The four ranges, with a decent low range of 2.72:1, make it great in all kinds of terrains.
What jeeps had the 242 transfer case?
The 242 premiered in the XJ Cherokee / Wagoneer and MJ Commache as the SelecTrac option. It was used in the 1991-1998 ZJ Grand Cherokee. The 242 persisted throughout the full run of XJ Cherokees and continued on in the 2002 KJ Liberty.
How much does a Dana 300 weigh?
The Dana 300 weighed in at approximately 85 lbs. The unit was clocked down on a 23 degree angle. The overall width was 16”. The output shafts were 26 splines on both the front and rear outputs.
How strong is a Dana 300?
The Dana 300 is strong enough from the factory to handle even the most potent engines and situations. An engineering analysis and years of combined experience shows that the rear set of gears (the Low output gears) are unbalanced and weaker in their strength with the front set.
Can you use gear oil in a transfer case?
Most transfer cases are filled with an automatic transmission fluid, which is usually red in colour. Others use a thicker gear oil, and some use a specialized fluid that is specifically made just for that transfer case.