1991 Jeep Wrangler Transfer Case

The Jeep Wrangler is a popular off-road vehicle that was first introduced in 1987. The Wrangler was designed to be a more capable than the CJ it replaced, and it soon became popular with both off-road enthusiasts and the military. The Wrangler’s transfer case is an important part of its 4×4 system, and it helps to provide power to the front and rear axles.

There are several different types of transfer cases available for the Wrangler, and each has its own advantages and disadvantages.

The Jeep Wrangler is a popular off-road vehicle that has been in production since 1987. The Wrangler features a transfer case that allows the driver to shift between two and four-wheel drive. The transfer case is responsible for distributing power from the engine to the wheels.

The Jeep Wrangler’s transfer case is designed to be durable and reliable. However, like any other mechanical component, it can eventually fail. If your Jeep Wrangler’s transfer case needs to be replaced, you have a few different options.

You can purchase a new or used transfer case, or you can rebuild your existing unit. If you decide to purchase a new or used transfer case, make sure that it is compatible with your Jeep’s model year and engine size. It’s also important to find a unit that has been tested and approved by Jeep engineers.

Rebuilding your Jeep Wrangler’s transfer case is another option worth considering. This process involves disassembling the unit and replacing any worn or damaged parts. Once thetransfer case has been rebuilt, it should function like new again.

If you need to replace or rebuild your Jeep Wrangler’s transfer case, be sure to do your research so that you end up with a quality product that will serve you well for many years to come!

NP 231 J Jeep Wrangler Transfer case Rebuild step by step

Jeep Yj Transfer Case Rebuild Kit

If your Jeep Yj Transfer Case is in need of a rebuild, there are many kits available on the market to help you do just that. A transfer case rebuild kit typically contains all of the necessary gaskets, bearings, and seals needed to renew yourtransfer case back to like-new condition. When it comes time torebuild your Jeep Yj Transfer Case, it is important to select a kit that best suits your needs.

For example, some kits come with upgraded parts to improve performance or increase strength and durability while others simply contain all of the basic replacement components. Whichever route you choose, a Jeep Yj Transfer Case Rebuild Kit will save you time and money versus purchasing each component separately. There are many reputable manufacturers out there offering quality Jeep Yj Transfer Case Rebuild Kits.

Do some research to find one that offers the right mix of quality and value for your specific application. With a little elbow grease and patience, you can easily rebuild your own transfer case at home and be back on the trails in no time!

What Transfer Case is in a Jeep Yj?

The Jeep YJ came with two different transfer cases. The NP207 and the NP231. The NP207 is a part-time, chain-driven transfer case.

It has a 2.72:1 low range and a 1:1 high range. The NP231 is a full-time, chain-driven transfer case. It has a 2.72:1 low range and a 0.87:1 high range.

How Do I Know What Transfer Case I Have in My Jeep?

If you’re not sure what transfer case is in your Jeep, don’t worry – there are only a few types that were used over the years, and it’s easy to identify which one you have. The most common type of transfer case in Jeeps is the NP231, which was used from 1987-2006 in Wranglers and Cherokees. If your Jeep has this type of transfer case, it will likely have a 23 spline input shaft and a 21 spline output shaft.

Other types of transfer cases that were used in Jeeps include the NP207 (used until 1986), the NP228/229 (used from 1988-1998), and the NV242/249 (used from 1999-present). To identify which transfer case you have, simply look for a tag or sticker on the unit itself – it should list the model number. You can also check your Jeep’s service manual to find out which type of transfer case was originally installed.

Are All Jeep 231 Transfer Cases the Same?

Are all Jeep 231 transfer cases the same? No, they are not. There are three different types of Jeep 231 transfer cases: the Full-Time, the Part-Time, and the Selec-Trac.

Each one is designed for a specific purpose and has different features. The Full-Time transfer case is designed for use in both on-road and off-road conditions. It has a constant engagement between the front and rear driveshafts, meaning that power is always being sent to both axles.

This makes it ideal for use in slippery or uneven terrain where traction may be an issue. The Part-Time transfer case is designed primarily for on-road use but can also be used off-road if necessary. It does not have the constant engagement between the front and rear driveshafts like the Full-Time model does, so power is only sent to one axle at a time.

This makes it more fuel efficient but less capable in slippery or uneven terrain. The Selec-Trac transfer case is similar to the Part-Time model but with one key difference: it has a mode selector that allows you to choose whether you want power sent to both axles or just one of them. This gives you more control over how your vehicle performs in different conditions and makes it more versatile than either of the other two options.

Is the 231 Transfer Case Good?

The 231 is a great transfer case for what it was designed for, which is light duty applications. It’s not as strong as some of the other available options, but it’s more than adequate for most Jeepers. There are a few things to watch out for though.

The main thing is the output shaft bearing. This has been known to fail prematurely and can cause all sorts of problems. Other than that, the 231 is a good choice for a budget-minded Jeep owner.

Conclusion

The 1991 Jeep Wrangler came with a transfer case that was designed to be used with the four-wheel drive system. This transfer case is responsible for providing power to the front and rear wheels, as well as transferring power from the engine to the transmission. The transfer case is located under the vehicle, between the frame and the body.

It is connected to the engine via a driveshaft, and it is connected to the transmission via a series of gears. The transfer case uses fluid to lubricate and cool itself, and it also uses fluid to engage and disengage the clutch. The clutch is what allows power to be transferred from the engine to the transmission.

When engaging the clutch, fluid pressure builds up in the system and forcesthe gears in the transfer case to turn.

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