Yukon Gear Master Overhaul Kit For 2011+ GM and Dodge 11.5in Diff

Complete Differential Rebuild Kit for 2011+ GM and Dodge 11.5in AAM Rear Axle

The YK GM11.5-B from Yukon Gear gives you everything required to fully rebuild the 2011-and-up GM and Dodge AAM 11.5-inch rear differential in a single box. Whether you are installing new ring and pinion gears or refreshing a high-mileage axle, YK GM11.5-B delivers OEM-matched Timken bearings, a full shim assortment, crush sleeve, pinion nut, seals, and all related hardware so the job starts and finishes without a parts-store run. The kit is tailored to the 4.375-inch O.D. inner pinion bearing design introduced in mid-2011, making YK GM11.5-B the correct choice for 2011-and-newer GM 2500 HD, 3500 HD, Ram 2500, and Ram 3500 trucks fitted with the AAM 11.5-inch 30-spline axle.

Features and Benefits

• Timken carrier bearings and races rated for heavy-duty truck torque loads
• Timken inner and outer pinion bearings with matched races for precise preload
• Complete shim assortment covering carrier and pinion depth adjustments
• High-quality pinion seal engineered to prevent gear oil leaks
• Crush sleeve included for correct pinion bearing preload on first setup
• New pinion nut ensures proper clamping force after installation
• Ring gear bolts included with Loctite thread locker for secure fastening
• Gear marking compound and brush for pattern verification
• Silicone included for differential cover sealing
• Backed by a 1-year manufacturer warranty against defects
• Designed specifically for the 4.375-inch pinion bearing O.D. used on 2011+ AAM 11.5-inch axles

Vehicle Fitment

Specifications

What Is Included

• Timken carrier bearings and races (pair)
• Timken inner pinion bearing and race (4.375-in. O.D.)
• Timken outer pinion bearing and race
• High-quality pinion seal
• Complete shim kit (carrier and pinion depth)
• Ring gear bolts
• Pinion nut
• Crush sleeve
• Oil baffles and slingers (where applicable)
• Thread locking compound
• Gear marking compound with brush
• Gasket or RTV silicone for differential cover
• 20-page installation instruction sheet

Frequently Asked Questions

Does the YK GM11.5-B include a crush sleeve?
Yes. The YK GM11.5-B includes a crush sleeve sized for the AAM 11.5-inch differential so you can set correct pinion bearing preload during installation.

What differential does YK GM11.5-B fit?
The YK GM11.5-B fits the AAM 11.5-inch rear differential used on 2011-and-up GM and Dodge/Ram heavy-duty trucks. It requires the 4.375-inch O.D. inner pinion bearing design introduced in mid-2011.

How is YK GM11.5-B different from YK GM11.5?
The YK GM11.5-B is designed for the mid-2011 and newer axle that uses a 4.375-inch O.D. inner pinion bearing race, while the YK GM11.5 covers the earlier 4.125-inch O.D. design used through 2010.

Will YK GM11.5-B fit a 2016 Ram 3500 with an 11.8-inch axle?
The YK GM11.5-B covers the 11.5-inch AAM housing. The 2016-and-up Ram 3500 may use a new 11.8-inch AAM axle with 16 ring gear bolts; verify your specific axle before ordering.

Does the YK GM11.5-B come with ring gear bolts?
Yes. Ring gear bolts and thread locking compound are both included with YK GM11.5-B.

Are Timken bearings included in YK GM11.5-B?
Yes. Both carrier bearings and all pinion bearings in the YK GM11.5-B are Timken-branded for OEM-equivalent strength and longevity.

What warranty applies to YK GM11.5-B?
Yukon Gear backs the YK GM11.5-B with a 1-year limited warranty against manufacturer defects. Under the Magnuson-Moss Warranty Act, this written warranty gives you specific legal rights, and you may also have additional rights that vary by state.

Does YK GM11.5-B include installation instructions?
Yes. A 20-page differential installation instruction sheet is included with YK GM11.5-B to guide you through every step of the rebuild process.

Do I need to purchase shims separately for YK GM11.5-B?
No. The YK GM11.5-B includes a complete shim kit covering both carrier and pinion depth adjustments so no additional shim purchases are typically required.

Installation Overview

1. Drain gear oil and remove the differential cover; clean all mating surfaces thoroughly.
2. Remove the carrier assembly and set aside; inspect the housing for wear or damage.
3. Press out the old pinion and remove bearings and races from the housing and carrier.
4. Install new Timken pinion bearing races (inner and outer) into the housing.
5. Set pinion depth using the shims included with YK GM11.5-B and a dial indicator.
6. Install the crush sleeve and new inner pinion bearing; insert pinion into housing.
7. Install the outer pinion bearing, yoke, and new pinion seal from the kit.
8. Tighten the new pinion nut gradually to achieve the specified pinion bearing preload.
9. Press new Timken carrier bearings onto the carrier; install carrier into housing.
10. Adjust carrier shims to set correct ring gear backlash per factory specification.
11. Apply marking compound to verify gear contact pattern; adjust as needed.
12. Torque ring gear bolts with thread locker to specification.
13. Install the differential cover with the included gasket or silicone; refill with gear oil.

Proposition 65 Warning: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.