Yukon Gear Master Overhaul Kit For Toyota V6 / 03+

Complete Rebuild Kit for Toyota V6 Rear Differential, 2003 and Newer, 29 Spline (YK TV6-B)

The YK TV6-B Yukon Gear Master Overhaul Kit is a complete rebuild kit engineered specifically for the 29-spline Toyota V6 rear differential used in 2003 and newer applications. Using KOYO bearings and races alongside high-quality seals, a complete shim set, and all required hardware, YK TV6-B ensures your rebuild meets exact factory specifications. This kit is the correct choice when your Toyota's rear differential is confirmed to have a 29-spline axle count. Yukon's extensive application research means every part in the YK TV6-B is a direct fit for this specific differential generation.

Features and Benefits

• KOYO bearings and races matched to Toyota V6 differential tolerances
• Designed exclusively for the 29-spline Toyota V6 rear differential, 2003 and newer
• Complete shim kit for precise pinion depth and carrier bearing preload adjustment
• All seals included to prevent differential fluid loss after rebuild
• Ring gear bolts and pinion nut included for complete hardware replacement
• Crush sleeve ensures correct pinion bearing preload on initial torque
• Oil baffles and slingers maintain proper internal lubrication
• Thread locker and marking compound with brush included for accurate gear setup
• Gasket included for proper cover resealing
• 1-year manufacturer warranty on all kit components

Vehicle Fitment

Specifications

What's Included

• KOYO carrier bearings and races
• KOYO pinion bearings and races
• Pinion seal
• Complete shim kit
• Ring gear bolts
• Pinion nut
• Crush sleeve
• Oil baffles and slingers
• Thread locking compound
• Marking compound with brush
• Gasket

Frequently Asked Questions

What is the key difference between YK TV6-B and YK TV6?
The YK TV6-B is designed for the 29-spline Toyota V6 rear differential used in 2003 and newer applications. The YK TV6 covers the same differential family for 2002 and earlier vehicles (plus some later models with the older spline count). Always verify your axle spline count before ordering.

How do I know if my Toyota has a 29-spline rear differential?
Count the splines on the axle shaft where it meets the differential. The YK TV6-B requires a 29-spline count. Many 2003 and newer Toyota 4Runner, FJ Cruiser, GX470, and certain Tacoma models use this 29-spline configuration.

Will the YK TV6-B void my vehicle warranty?
Under the Magnuson-Moss Warranty Act, a vehicle manufacturer cannot void your warranty solely because you used aftermarket parts unless they can prove the part caused the specific failure. Using YK TV6-B for a differential rebuild does not automatically void your powertrain warranty.

Is there a break-in procedure after installing this kit?
Yes. Vary vehicle speed and avoid sustained high-speed highway driving or heavy towing for the first 500 miles after installation. Inspect for fluid seepage at the 100-mile mark. This allows the KOYO bearings and gear surfaces to properly seat.

What tools are needed for installation?
You will need a hydraulic bearing press, dial indicator for backlash measurement, inch-pound and foot-pound torque wrenches, seal driver set, snap ring pliers, and a pinion depth gauge or equivalent setup tools.

Does this kit include axle seals?
The YK TV6-B includes a pinion seal. Axle tube seals may be sold separately depending on their condition. Inspect the axle tube seals during disassembly and replace if worn.

What gear oil is recommended after this rebuild?
Use a GL-5 rated 75W-90 or 80W-90 gear oil as specified in your factory service manual. Change the oil again at the 500-mile break-in mark to remove any debris from initial gear contact.

Is the YK TV6-B a special order item?
Yes, the YK TV6-B may have extended lead times as a special order product. Contact us at Black Ops Auto Works to confirm availability and estimated delivery before placing your order.

Installation Instructions

1. Raise and safely support the vehicle. Drain the differential fluid and inspect for metal contamination.
2. Remove the rear axle shafts and disconnect the driveshaft from the differential yoke.
3. Remove the differential carrier from the housing; mark bearing caps for correct reinstallation.
4. Press out old carrier bearings and remove the carrier from the housing.
5. Remove the pinion nut and yoke, then drive out the old pinion shaft.
6. Press old pinion bearing cups from the housing bores and record shim stack thickness for reference.
7. Clean all housing bores, carrier surfaces, and mating faces thoroughly.
8. Press new KOYO pinion bearing cups from the YK TV6-B kit into the housing until fully seated.
9. Select the pinion depth shim from the complete shim kit and verify gear contact using marking compound and brush.
10. Install the new crush sleeve, front KOYO bearing, and new pinion seal.
11. Torque the pinion nut to achieve correct rotational preload (approximately 14-19 in-lbs new bearing preload).
12. Press new KOYO carrier bearings onto the differential carrier.
13. Set carrier bearing preload using the adjuster shims and verify backlash (target 0.005-0.007 inches).
14. Verify gear contact pattern with marking compound, then torque ring gear bolts with included hardware.
15. Reinstall bearing caps in their original orientation and torque to specification. Apply thread locker as directed.
16. Install the gasket and cover, reinstall axle shafts, reconnect the driveshaft, and fill with the correct gear oil.
17. Complete the 500-mile break-in and inspect for leaks at 100 miles.

Prop 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.