Yukon GM 14-Bolt 10.5" Master Overhaul Kit - Rear Axle, '88 & older
YKGM14T-A
The Yukon Master Overhaul Kit for 1988 and older GM 14-Bolt 10.5" rear axles includes the bearings, races, seals, shims, and setup components needed for a complete differential rebuild. Built with Timken carrier and pinion bearings, this kit is designed to restore proper bearing preload, gear alignment, and dependable operation in factory trucks, restorations, trail rigs, and custom off-road builds.
A master overhaul kit is the right choice when replacing gears, installing a locker, or rebuilding a worn differential because it replaces the critical wear components that determine gear pattern, pinion depth, and long-term reliability. Ring gear bolts are not included, and professional differential setup is recommended.
Includes:
- Timken carrier bearings and races
- Timken pinion bearings and races
- Pilot bearing
- Pinion seal
- Complete shim kit
- Pinion nut
- Crush sleeve
- Thread locker
- Gear marking compound and brush
- Differential cover gasket
Note: Ring gear bolts are not included.
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Yukon Gear & Axle |
| Product Type | Master Differential Overhaul Kit |
| Axle Application | GM 14-Bolt 10.5" Rear Axle |
| Model Year Range | 1988 and Older |
| Ring Gear Diameter | 10.5" |
| Bearing Manufacturer | Timken |
| Differential Position | Rear |
| Installation Type | Differential Rebuild / Gear Installation |
| Ring Gear Bolts Included | No |
Fitment
| Year Range | Make | Model |
|---|---|---|
| 1973–1988 | Chevrolet | C20, C20 Pickup, C20 Suburban, C2500 |
| 1973–1988 | Chevrolet | C30, C30 Pickup, C3500 |
| 1975–1988 | Chevrolet | G20, G30 |
| 1973–1988 | Chevrolet | K20, K20 Pickup, K20 Suburban, K2500 |
| 1972–1988 | Chevrolet | K30, K30 Pickup, K3500 |
| 1987–1988 | Chevrolet | R20, R20 Suburban, R30, V20, V20 Suburban, V30 |
| 1973–1988 | GMC | C25, C25 Suburban, C25/C2500 Pickup, C25/C2500 Suburban, C2500, C2500 Suburban |
| 1973–1988 | GMC | C35, C35/C3500 Pickup, C3500 |
| 1979–1988 | GMC | G1500, G3500 |
| 1967–1988 | GMC | K25, K25 Suburban, K25/K2500 Pickup, K25/K2500 Suburban, K2500, K2500 Suburban |
| 1977–1988 | GMC | K35, K3500 |
| 1987–1988 | GMC | R2500, R2500 Suburban, R3500, V2500, V2500 Suburban, V3500 |
Fitment Notes:
- Fits GM 10.5" 14-Bolt rear axle applications from 1988 and older.
- Vehicle year, make, and model alone do not guarantee axle fitment; verify the axle is a GM 10.5" 14-Bolt before ordering.
- Confirm the axle identification, bearing design, and housing configuration before disassembly.
- This kit is intended for differential rebuilds, ring-and-pinion installation, and locker or carrier replacement.
- Ring gear bolts are not included and should be inspected or replaced separately when required.
- Differential setup requires correct pinion depth, bearing preload, backlash, and gear contact pattern.
- Professional installation is recommended unless the installer has the required setup tools and differential-building experience.
FAQ
How do I know whether I have a GM 10.5" 14-Bolt axle?
The GM 10.5" 14-Bolt is commonly identified by its large rear differential cover with 14 cover bolts and its full-floating hub design. Because housings may have been swapped over the years, verify the axle itself rather than relying only on the vehicle model.
What is the difference between a master overhaul kit and an installation kit?
A master overhaul kit typically includes carrier bearings, pinion bearings, races, seals, shims, and setup hardware. A basic installation kit may include only shims, seals, and hardware without all major bearings.
Do I need this kit when installing new gears or a locker?
A master overhaul kit is strongly recommended when installing a new ring and pinion, replacing the carrier, or adding a locker. Reusing worn bearings and seals can make correct setup difficult and shorten the life of the new components.
Are ring gear bolts included?
No. Ring gear bolts are not included. Inspect the existing bolts carefully and replace them if the gear manufacturer, locker manufacturer, or axle condition requires new hardware.
Can I install this differential rebuild kit myself?
Differential assembly requires specialized tools and accurate measurement of pinion depth, bearing preload, backlash, and gear pattern. Experienced builders may perform the installation, but professional setup is recommended for most customers.