Yukon Dana 70U Master Overhaul Kit for Rear Differentials
YUKYK D70-U
This Yukon Dana 70U Master Overhaul Kit is designed for rebuilding heavy-duty Dana 70U rear differential assemblies used in commercial trucks, tow rigs, vans, and one-ton applications. The kit includes Timken bearings and races along with seals, shims, hardware, and setup materials to properly restore differential preload, backlash, and long-term reliability.
Dana 70U rear axles are frequently used in high-load towing, commercial hauling, and off-road applications where increased torque and vehicle weight place substantial stress on carrier bearings, pinion bearings, and preload components. Proper setup is critical to maintaining quiet operation and long gear life under heavy load.
Includes:
- Carrier Bearings and Races
- Pinion Bearings and Races
- Pinion Seal
- Complete Shim Kit
- Ring Gear Bolts
- Pinion Nut
- Oil Baffles and Slingers
- Thread Locker
- Gear Marking Compound with Brush
- Differential Gasket
Specifications
- Fits Dana Spicer 70U rear differentials
- Designed for heavy-duty rear axle applications
- Includes Timken bearings and races
- Includes complete shim and setup hardware kit
- Supports differential rebuild and gear installation
- Compatible with 32 spline and 35 spline Dana 70U applications
- Uses HM803110 / HM803149 inner pinion bearing configuration
- Uses 382S / 387A carrier bearings
Fitment
|
Make |
Model |
Year Range |
|
Chevrolet |
G30 |
1984–1990 |
|
Dodge |
B300 |
1971–1980 |
|
Dodge |
B350 |
1981–1994 |
|
Dodge |
D250 |
1984–1993 |
|
Dodge |
D350 |
1981–1993 |
|
Dodge |
Ram 2500 |
1994–2002 |
|
Dodge |
Ram 3500 |
1994–2002 |
|
Dodge |
Ram 2500 Van |
1999–2003 |
|
Dodge |
Ram 3500 Van |
1999–2003 |
|
Dodge |
W250 |
1984–1993 |
|
Dodge |
W350 |
1984–1993 |
|
Ford |
E-350 Econoline |
1982–1998 |
|
Ford |
E-350 Econoline Club Wagon |
1999 |
|
Ford |
E-350 Super Duty |
2000–2012 |
|
Ford |
F-350 |
1970–2002 |
|
Ford |
F-350 Super Duty |
1999–2002 |
|
GMC |
C3500 |
1984–1990 |
|
GMC |
G35 / G3500 |
1973–1991 |
|
GMC |
K3500 |
1984–1990 |
|
GMC |
R3500 |
1987 |
|
GMC |
V3500 |
1987 |
Fitment Notes:
- Fits Dana 70U rear differential applications only
- Compatible with both 32 spline and 35 spline axle configurations
- Verify carrier bearing and spline configuration before ordering
Tech Insight
Dana 70U rear axles are commonly used in heavy-duty towing and commercial applications because of their large ring gear size and high load capacity. Vehicles equipped with Dana 70U axles often experience significant driveline stress from towing, oversized tires, payload weight, and commercial use, making bearing condition and differential setup especially important.
Replacing carrier bearings, pinion bearings, preload hardware, and shim packs during gear installation or rebuild service helps maintain proper backlash and bearing preload. Reusing worn components can result in gear noise, heat buildup, and shortened differential life under heavy load conditions.