Yukon GM 8.5" Rear Master Overhaul Kit - 28 Spline
YUKYK GM8.5
The GM 8.5" Rear Master Overhaul Kit provides the bearings, races, seal, shims, and setup components needed for a complete GM 8.5" rear differential rebuild. Built around Timken bearing components, this kit is intended for gear changes, worn differential service, and complete axle rebuilds where pinion preload, carrier preload, backlash, and gear tooth contact pattern must be properly reset.
This kit is designed for GM 8.5" rear axle applications using 1.625" carrier journals and the LM501314 / LM501349 carrier bearing configuration. These axles were used across a wide range of GM cars, trucks, SUVs, vans, and performance platforms, so the actual differential configuration should always be verified before ordering rather than relying on vehicle year and model alone.
Includes:
- Carrier Bearings and Races
- Pinion Bearings and Races
- Pinion Seal
- Complete Shim Kit
- Ring Gear Bolts
- Pinion Nut
- Crush Sleeve
- Thread Locker
- Gear Marking Compound with Brush
- Differential Gasket
Specifications
| Specification | Details |
|---|---|
| Product Type | Master Differential Overhaul Kit |
| Axle Application | GM 8.5" Rear Differential |
| Position | Rear |
| Bearing Manufacturer | Timken |
| Carrier Bearing Configuration | LM501314 / LM501349 |
| Carrier Journal Diameter | 1.625" |
| Axle Spline Compatibility | Compatible with Many 28-Spline GM 8.5" Applications |
| Carrier Bearings and Races | Included |
| Pinion Bearings and Races | Included |
| Pinion Seal | Included |
| Shim Kit | Included |
| Ring Gear Bolts | Included |
| Crush Sleeve | Included |
| Pinion Nut | Included |
| Differential Gasket | Included |
| Setup Materials | Thread Locker and Gear Marking Compound with Brush |
Fitment
| Make | Model | Year Range |
|---|---|---|
| Buick | Regal | 1973–1987 |
| Buick | Riviera | 1975–1978 |
| Cadillac | Escalade | 1999–2000 |
| Chevrolet | Blazer | 1987–1994 |
| Chevrolet | C1500 / K1500 | 1988–1999 |
| Chevrolet | Camaro | 1970–1981 |
| Chevrolet | Caprice / Impala | 1970–1996 |
| Chevrolet | Express 1500 | 1996–2003 |
| Chevrolet | Monte Carlo | 1973–1978 |
| Chevrolet | Nova | 1970–1979 |
| Chevrolet | S10 | 1994–2000 |
| Chevrolet | Suburban 1500 | 1992–2000 |
| Chevrolet | Tahoe | 1995–1998 |
| GMC | C1500 / K1500 | 1979–1999 |
| GMC | G1500 | 1979–1995 |
| GMC | Savana 1500 | 1996–2003 |
| GMC | Sonoma | 1994–2000 |
| GMC | Yukon | 1992–2000 |
| Oldsmobile | Cutlass | 1970–1977 |
| Oldsmobile | Omega | 1973–1979 |
| Pontiac | Bonneville | 1970–1986 |
| Pontiac | Firebird | 1970–1981 |
| Pontiac | GTO | 1970–1973 |
| Pontiac | Grand Prix | 1971–1987 |
| Pontiac | LeMans | 1971–1981 |
Fitment Notes:
- Fits GM 8.5" rear differential applications only.
- Compatible with many 28-spline axle configurations.
- Designed for applications using 1.625" carrier journals.
- Uses LM501314 / LM501349 carrier bearings.
- Vehicle year and model do not guarantee fitment because many GM vehicles were available with multiple rear axle configurations.
- Later truck, SUV, and van applications may use different carrier bearings, seals, or axle spline counts.
- Verify ring gear diameter, carrier journal size, axle spline count, bearing numbers, and housing configuration before ordering.
- Professional differential setup is recommended because pinion depth, bearing preload, backlash, and gear contact pattern must be established correctly during installation.
FAQ
What is included in a GM 8.5" master overhaul kit?
This kit includes the carrier and pinion bearings and races, pinion seal, shims, ring gear bolts, pinion nut, crush sleeve, differential gasket, thread locker, and gear marking compound needed for a complete differential rebuild and setup.
How do I know if I have a GM 8.5" rear differential?
Identify the axle by the housing, differential cover shape, ring gear size, casting features, and internal bearing dimensions rather than relying only on the vehicle model. GM used multiple rear axle designs across many of the vehicles listed above.
Will this kit fit both 28-spline and 30-spline GM 8.5 axles?
The supplied fitment information identifies this kit as compatible with many 28-spline GM 8.5" applications. Do not assume compatibility with a 30-spline carrier without confirming the carrier journal size, bearing numbers, and differential configuration first.
Do I need a master overhaul kit when installing new ring and pinion gears?
A master overhaul kit is recommended when changing gears or rebuilding a high-mileage differential because correct setup depends on fresh bearings and accurate pinion preload, carrier preload, backlash, and gear contact pattern.
Why does the carrier journal size matter when ordering a GM 8.5 rebuild kit?
The carrier bearings must match the diameter of the differential carrier journals. This kit is specified for 1.625" carrier journals using LM501314 / LM501349 bearings, so confirming that dimension helps prevent ordering the wrong bearing package.