Overview
It is a 4.56 gear set for the AMC Model 20 axle, and it fits front or rear positions.
The gears are made to original equipment specifications and are double lapped and double shot peened. A 10 year warranty applies to the set.
Key features
- 4.56 gear ratio
- Front or rear position
- Double shot peened
- Double lapped
- Manufactured to O.E. specifications
Tooth contact and break-in
Tooth contact is the check that shows whether a gear set has been set up correctly. A pattern that sits toward the center of the tooth and runs evenly along the drive side is the usual target. Patterns that run too close to the top or toe point to pinion depth issues, and those should be corrected before the axle goes into regular use.
Break-in is part of the install. Fresh gear oil at the start helps catch fine metal from the new teeth, and checking the fluid after the first trips shows whether the setup is settling. Warm the gear oil before a long run, and avoid heavy loads for the first stretch of driving.
- Use fresh gear oil at the start of break-in
- Check the drained oil for fine metal particles
- Recheck carrier cap bolts after the first trips
- Keep a record of pinion depth and preload settings
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | 2-2025-456 |
| UPC | 631410093704 |
| Axle type | AMC 20 |
| Axle location | Front or rear |
| Gear ratio | 4.56 |
| Carrier | 3.07 and up |
| Warranty | 10 years, per G2 |
Vehicle fitment
Universal fit is listed, but no vehicle is named. The set is for the AMC Model 20 at 4.56, so confirm the carrier and axle before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A 4.56 set needs the carrier at 3.07 or higher. Tooth contact checks and break-in are part of a correct install.
What’s included
One ring and pinion set.
