Overview
The Trail Gear 140425-1-KIT is a stock replacement pinion seal for an 8in. Toyota differential.
Compare the part number and differential size against your axle before buying.
Key features
- Stock replacement pinion seal
- Fits an 8in. Toyota differential
- Sold under a KIT part number
Pinion seal basics
A pinion seal keeps gear oil inside the differential where the driveshaft yoke enters the housing. Leaks at this seal usually show as oil around the front of the differential, often more noticeable after hard driving or high-water crossings. Because the seal sits between the driveline and the gears, it is often replaced with the yoke and bearing work.
Replacing the pinion seal involves removing the yoke, so plan for the pinion preload and yoke nut torque to be set correctly. Take care not to overtighten the yoke nut, since that can change bearing preload. Check the gear oil level after the install, and inspect the yoke sealing surface for grooves or pitting before fitting the new seal.
- Inspect the yoke sealing surface for wear
- Use a new yoke nut and crush sleeve where the design calls for them
- Check gear oil level after installation
Specifications
| Brand | Trail Gear |
|---|---|
| Part number | 140425-1-KIT (also shown as TGI140425-1-KIT) |
| UPC | 70000621499 |
| Product type | Differential pinion seal |
| Application | 8in. Toyota differential |
Vehicle fitment
Confirm the 8in. Toyota differential matches your axle before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Follow the installation instructions for your vehicle and torque all fasteners to the levels required for your model.
- Check the part against your vehicle before starting work.
- Re-check fasteners after the first miles of driving, and again after hard off-road use.
