Overview
The Dana Spicer 10067221 is a rear ring and pinion gear set rated at 4.56 for the Dana 35 AdvanTEK axle. Gear sets like this one set the final drive ratio between the driveshaft and the wheels, so the ratio has to suit the axle it goes into.
The gears are made to original equipment specifications. Matching the axle type and gear ratio is the main compatibility check for this set.
Key features
- 4.56 gear ratio
- Rear axle position
- Dana 35 AdvanTEK axle type
- Made to original equipment specifications, per Dana Spicer
Reading tooth contact
Tooth contact pattern shows how the ring and pinion are meshing under load. A proper pattern sits centered on the tooth face, and it is checked with marking compound before the axle returns to use. If the pattern runs toward the toe or heel, or is too high or low on the face, the setup needs correction, usually by changing pinion depth or backlash.
Gears at higher ratios often see more load per tooth, so setup accuracy and break-in matter. Use the proper tools for measurement and keep the housing clean during assembly. Inspect the pinion seal and check gear oil after the first drives. Noise that changes with load or speed usually points to a setup problem rather than a finished job.
- Mark teeth with compound for a contact check
- Adjust depth and backlash to correct the pattern
- Watch for noise changes after break-in
Specifications
| Brand | Dana Spicer |
|---|---|
| Part number | 10067221 |
| Axle location | Rear |
| Axle type | Dana 35 AdvanTEK |
| Axle manufacturer | Dana |
| Gear ratio | 4.56 |
| Fitment | Universal fit, by axle type |
Vehicle fitment
Fitment is by axle type. This 4.56 set is for the Dana 35 AdvanTEK rear axle, and no vehicle year, make, model or trim is named. Confirm the housing and ratio before installing.
Gears for other axle types or ratios are a different part. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Set pinion depth and backlash with proper tools, then check the tooth contact pattern before the axle is returned to use. Gears like these usually need a professional setup and a break-in period.
What’s included
The rear ring and pinion gear set is the item described.
Not included: Check the package contents for bearings, shims and seals before starting, since they are needed for a complete rebuild.
