Yukon Gear Master Overhaul Kit for Dana 30 Front Differential (Long Pinion)

Yukon Gear YK D30-F Master Overhaul Kit for Dana 30 Front Differential (Long Pinion)

The YK D30-F is a comprehensive complete rebuild kit engineered for the Dana 30 front differential in its long-pinion (older) configuration, as found in classic Jeep CJ, Wrangler YJ, Cherokee, Scrambler, and comparable off-road platforms. If your rig is due for a front differential overhaul, the YK D30-F delivers Timken-grade bearings, precision shims, seals, and all the hardware you need to restore proper function. Yukon Gear built the YK D30-F complete rebuild kit so rebuilders have everything at hand before pulling the differential apart.

Features and Benefits

• Genuine Timken carrier bearings and pinion bearings for maximum load capacity and longevity
• Precision shim sets for both pinion depth and carrier preload adjustment
• High-quality pinion seal and axle seals to keep gear oil contained under off-road conditions
• Ring gear bolts and pinion nut included for a complete hardware refresh
• Crush sleeve included for proper pinion preload setup
• Gear marking compound and brush for verifying ring-and-pinion contact pattern
• Thread-locking compound for ring gear bolt installation
• Differential cover gasket included
• Designed specifically for the Dana 30 long-pinion (older production) front axle variant

Fitment

Specifications

What's Included

• Timken carrier bearings with races (2 sets)
• Timken pinion bearings with races (front and rear)
• Pinion seal
• Axle seals (pair)
• Complete pinion depth shim set
• Complete carrier shim set
• Ring gear bolts
• Pinion nut
• Crush sleeve
• Thread-locking compound
• Gear marking compound with brush
• Differential cover gasket

Frequently Asked Questions

Q: What makes this kit different from the YK D30-TJ?
A: The YK D30-F covers the older long-pinion Dana 30, while the YK D30-TJ is calibrated for the short-pinion Dana 30 as used in the Jeep TJ and later XJ applications. Confirm your axle's pinion style before ordering.

Q: Is this kit suitable for a Jeep CJ7 with a Dana 30 front axle?
A: Yes. The YK D30-F complete rebuild kit is designed specifically for the CJ5, CJ7, and Scrambler with the long-pinion Dana 30 front differential.

Q: Are Timken bearings included?
A: Yes, the YK D30-F includes genuine Timken bearings and races for both the carrier and pinion positions.

Q: Will installing this kit void my warranty?
A: Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your warranty solely because you used an aftermarket part. Coverage can only be denied if the aftermarket part directly caused the failure in question.

Q: Do I need special tools to install this kit?
A: Yes. A bearing press, dial indicator, and inch-pound torque wrench are required for proper pinion preload and backlash setup. A depth micrometer or equivalent setup tool is also recommended.

Q: Does this kit include a crush sleeve?
A: Yes, the YK D30-F includes a new crush sleeve, ring gear bolts, pinion nut, and all necessary seals and shims.

Q: Does the kit fit a Ford early Bronco Dana 30?
A: Yes, the YK D30-F is designed to fit early Ford Bronco applications using the long-pinion Dana 30 front differential.

Q: Is a gasket included for the differential cover?
A: Yes, a differential cover gasket is included in the YK D30-F complete rebuild kit for a clean reinstall.

Installation Instructions

1. Drain the differential gear oil and remove the front axle shafts per your service manual.
2. Remove the differential cover and thoroughly clean both mating surfaces.
3. Remove the carrier assembly and inspect the housing bore for wear or damage.
4. Extract the pinion shaft and note the original shim stack thickness for reference.
5. Press off the old pinion bearings and install the new Timken pinion bearings from the YK D30-F kit.
6. Use the included shim set to establish correct pinion depth; verify with a dial indicator.
7. Press new carrier bearings onto the carrier using the included bearing races.
8. Install the carrier assembly, set backlash to spec, and verify contact pattern using the included marking compound.
9. Apply included thread-locking compound to ring gear bolts and torque to Dana specification.
10. Install the new pinion seal and torque the pinion nut to achieve correct pinion bearing preload.
11. Install new axle seals, reinstall axle shafts, and torque all fasteners to specification.
12. Install the cover with the new gasket; fill with the appropriate gear oil type and quantity.
13. Road test the vehicle and inspect for leaks after the initial break-in period.

California Proposition 65 Warning: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer, birth defects, and other reproductive harm. For more information, visit www.p65warnings.ca.gov.