Overview
The Crown Automotive J3208474 is a pinion seal and nut set for the AMC Model 20 axle. It is a direct fit replacement, and the seal keeps oil in the pinion area while the nut secures the pinion.
The AMC Model 20 is the only axle application for this set, so the axle type is the main match point.
Key features
- Pinion seal and nut named in the title
- AMC Model 20 axle application
- Direct fit replacement
Pinion seal service tips
The pinion seal sits where the driveshaft joins the differential, and it holds gear oil inside the housing. A worn seal often shows as a damp spot or drips under the axle. Replacing it early can prevent oil loss and a costly gear or bearing failure.
Pinion nut torque matters, because bearing preload depends on it. Tighten to the value in your service manual, and recheck the preload after the first drives. Use a new seal rather than a reused one, and clean the sealing surface before installing.
Replacing the pinion seal is a good time to inspect the pinion bearings and yoke. Look for play, rough rotation or grooves where the seal rides. A worn yoke can tear a new seal quickly.
- Check for oil drips at the pinion
- Inspect the yoke sealing surface
- Use fresh gear oil after the job
- Recheck preload after the first drives
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J3208474 |
| UPC | 848399079333 |
| Components | Pinion seal and nut |
| Axle | AMC Model 20 |
| Fitment method | Direct Fit |
Vehicle fitment
Match the AMC Model 20 axle before fitting the seal, since the set is sized to that axle type.
Confirm your vehicle’s year, model and trim before ordering.
What’s included
The pinion seal and nut come as the set. Lay out the arriving parts against your install plan before fitting.
