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Jeep Driveline Tech

Technical, helpful and educational information about Jeep driveline components and parts. Looking to understand what a sway bar does? Maybe you are looking for long slip yoke driveshaft?

Jeep NV241OR Swap – Replacing a NP231 Transfer Case

The Jeep NP231 transfer case, used in everything from YJs to TJs and XJs is a lightweight, reliable part of the 4WD puzzle. But when you start throwing serious tires, lockers, and steep trails at your Jeep, its limits can become obvious. Enter the NV241OR Rock-Trac transfer case, Jeep’s heavy-duty, gear-driven crawler that comes factory …

Understanding Jeep Transfer Cases: How They Work and Which Models Matter

We always get questions about a Jeep’s transfer case and it surprises me how many people don’t fully understand what this thing attached to the Jeep’s transmission does. A Jeep transfer case is the mechanical heart of the 4WD system. It’s the part that splits power from the transmission and sends it to the front …

Driveline Angles – Part 3

CORRECTING U-JOINT OPERATING ANGLES The recommended method for correcting severe u-joint operating angles depends on the vehicle suspension or driveline design. On vehicles with leaf springs suspension, thin wedges called axle shims can be installed under the leaf springs of single axle vehicles to tilt the axle and correct u-joint operating angles. Wedges are available …

Jeep Tech – Transmissions

The Jeep transmission pages cover stock Jeep transmissions and transmission swaps in Jeep vehicles. Stock transmissions used in Jeeps from 1941 until 1999 are covered in detail. There are articles about various transmission swaps using both automatic and manual transmissions. Articles Factory Transmissions : These pages cover the transmissions used in Jeeps over the years. Transmissions …

Driveline Angles – Part 2

CHECKING DRIVESHAFT ANGLES IN THE VERTICAL OR HORIZONTAL PLANE WARNING: Rotating shafts can be dangerous. You can snag clothes, skin, hair, hands, etc. This can cause serious injury or death. Do not work on a shaft (with or without a guard) when the engine is running Use the following procedure to check driveshaft angles for …

Clutches, Linkages & Bellhousings for Jeep Conversions Part 4

Obtain a release bearing based on the above measurement and install it on the fork. Be advised that forks with the flat type spring require that the tips of the fork AS WELL AS THE TIPS OF THE SPRING are installed in the groove of the release bearing. This chart shows the length of the …

Clutches, Linkages & Bellhousings for Jeep Conversions Part 3

Hydraulic Style Linkage Hydraulic clutch linkage systems have moved into dominance in the past two decades, and generally with good reason. The most common rendition of this linkage consists of the pedal pushrod against a master piston / cylinder, a high-pressure tube or line and a slave piston / cylinder whose pushrod pushes the clutch …

Clutches, Linkages & Bellhousings for Jeep Conversions Part 2

Clutch Release BearingAs its name implies, this is the bearing that releases the clutch. It is often referred to as a “throw-out” bearing. They come on a number of different style carriers. The carriers, in some cases, vary considerably with the particular engine. In the GM line, for example, the bearings are all the same …

ARB Locker Tech

ARB Air Lockers is a driver controlled differential lock actuated by pushing a dash mounted button. In only one tenth of a second compressed air actuates a piston inside the differential which engages a locking gear, instantly locking the differential and directing drive torque to the wheels with maximum traction. The differential lock is a …

Transfer Case Upgrades, Modifications, and Options

We get a lot of email from fellow Jeepers wanting to know what the options are for killer transfer cases. Some are looking for strength while others are looking for low gears. In this article we attempt to uncover all that is out there.

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