Yukon Gear Replacement Crush Sleeve Eliminator For JK Dana 44 Rear

Yukon Gear Crush Sleeve Eliminator for Jeep Wrangler JK Dana 44 Rear Differential

Set your Jeep Wrangler JK Dana 44 rear differential pinion preload with confidence using the Yukon Gear SK CSJK-R Crush Sleeve Eliminator. The YUKSK CSJK-R replaces the factory crush sleeve with a solid, precision-machined spacer paired with a shim assortment specifically sized for the JK Dana 44 rear axle. This kit is ideal for JK owners doing a ring and pinion swap, a differential rebuild, or anyone who wants precise, repeatable preload without dealing with a one-time-use crush sleeve.

Features and Benefits

• Designed specifically for the Jeep Wrangler JK Dana 44 rear differential
• Solid spacer replaces the factory crush sleeve for exact and repeatable pinion preload settings
• Shim assortment allows fine-tuning of preload to exact specification
• Reusable spacer survives multiple rebuilds without deforming
• Also fits Nissan Frontier, Pathfinder, Titan, and Xterra with the matching differential
• Eliminates the risk of over-crushing and bearing damage during assembly
• Backed by Yukon Gear's limited warranty

Vehicle Fitment

Specifications

What's Included

• Solid pinion spacer (crush sleeve eliminator)
• Assorted preload shims

Frequently Asked Questions

Why should I use the SK CSJK-R instead of a factory crush sleeve?
The YUKSK CSJK-R provides precise and repeatable pinion preload. A factory crush sleeve deforms unpredictably and can only be used once, making accurate preload difficult to achieve. The solid spacer with shims lets you set exact preload and reuse the assembly.

Is this kit specific to the JK Wrangler rear Dana 44?
Yes, the SK CSJK-R is sized for the Jeep Wrangler JK rear Dana 44 differential, as well as compatible Nissan platforms that share the same differential housing dimensions.

Do I need any special tools to install this kit?
You will need a pinion bearing preload tool or an inch-pound torque wrench to verify preload during installation. Standard differential rebuild tools are otherwise sufficient.

Will installing the SK CSJK-R void my Jeep warranty?
Under the Magnuson-Moss Warranty Act, your vehicle manufacturer cannot void your warranty simply because you installed an aftermarket part unless they can prove the part caused a failure. Proper installation of the YUKSK CSJK-R should not void your factory powertrain warranty.

Can I reuse the spacer when I upgrade gears again?
Yes. The solid spacer in the SK CSJK-R is designed for reuse. Simply adjust the shim stack during reassembly to achieve the correct preload with new bearings or a new gear ratio.

What is the target pinion preload for the JK Dana 44 rear?
Always refer to Jeep's service documentation or Yukon Gear's technical specifications for the exact rolling preload range. Typical values for Dana 44 with new bearings are in the range of 15-35 inch-pounds.

Does the YUKSK CSJK-R include a pinion seal or bearings?
No. This kit contains the solid spacer and shims only. Bearings and pinion seals are sold separately.

What lubrication does the JK Dana 44 rear use?
The JK Dana 44 rear requires the fluid specified in the Jeep service manual, typically a 75W-90 or 75W-140 synthetic gear oil. Always use the correct friction modifier if a Trac-Lok limited-slip carrier is installed.

Installation Instructions

1. Safely support the vehicle and drain the differential fluid from the JK Dana 44 housing
2. Remove the driveshaft and mark its orientation for reinstallation
3. Remove the pinion nut and flange, then extract the pinion shaft
4. Remove and discard the original crush sleeve from the pinion shaft
5. Inspect all pinion and carrier bearings for wear; replace any damaged components
6. Slide the solid spacer from the YUKSK CSJK-R kit onto the pinion shaft
7. Add the initial shim selection to the spacer, starting with a thickness that will produce preload near the low end of specification
8. Reinstall the pinion assembly and torque the pinion nut
9. Measure rolling preload with an inch-pound torque wrench; adjust shim thickness as needed
10. Once correct preload is confirmed, install a new pinion seal and complete the differential assembly with fresh gear oil

Proposition 65 Warning: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.