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Yukon Gear Axle End Play Shim 0.003in Thick for AMC Model 20 Differential
The SK M20-3 from Yukon Gear and Axle is an axle end play shim kit for the AMC Model 20 differential, providing shims at 0.003in thickness along with other sizes for complete end play adjustment capability. Part number SK M20-3 fits 1968-1986 AMC and Jeep vehicles that use the Model 20 rear axle, including the Jeep CJ5, CJ7, J10, Scrambler, and Wagoneer, as well as AMC Hornet, Javelin, Matador, Pacer, and Concord models. The SK M20-3 also covers the Hummer H1, which shares the AMC Model 20 axle configuration. The kit includes 2 shims each of 0.003in, 0.005in, 0.010in, 0.015in, 0.020in, and 0.030in to provide a full range of end play adjustment in a single package.
Features and Benefits
- Designed for the AMC Model 20 differential axle end play adjustment
- Primary shim thickness: 0.003in
- Kit includes 2 shims each of 0.003, 0.005, 0.010, 0.015, 0.020, and 0.030in thicknesses
- Covers 1968-1986 AMC and Jeep CJ, J-series, and Wagoneer applications
- Compatible with the Hummer H1 AMC Model 20 axle
- Manufactured to Yukon Gear tolerances for accurate end play control
- Eliminates excessive axle shaft end play that causes noise and premature bearing wear
Fitment
| Year | Make | Model | Notes |
|---|---|---|---|
| 1972-1983 | Jeep | CJ5 | AMC Model 20 rear axle |
| 1976-1986 | Jeep | CJ7 | AMC Model 20 rear axle |
| 1981-1985 | Jeep | CJ8 Scrambler | AMC Model 20 rear axle |
| 1974-1987 | Jeep | J10 / J20 Truck | AMC Model 20 rear axle |
| 1974-1991 | Jeep | Wagoneer | AMC Model 20 rear axle |
| 1970-1977 | AMC | Hornet | AMC Model 20 rear axle |
| 1968-1978 | AMC | Javelin | AMC Model 20 rear axle |
| 1971-1978 | AMC | Matador | AMC Model 20 rear axle |
| 1975-1980 | AMC | Pacer | AMC Model 20 rear axle |
| 1978-1983 | AMC | Concord | AMC Model 20 rear axle |
| 1992-2006 | Hummer | H1 | AMC Model 20 axle configuration |
Specifications
| Specification | Detail |
|---|---|
| Part Number | SK M20-3 |
| UPC | 883584550600 |
| Differential | AMC Model 20 |
| Kit Type | Axle End Play Shim Kit |
| Primary Shim Thickness | 0.003in |
| Included Thicknesses | 0.003, 0.005, 0.010, 0.015, 0.020, 0.030in (2 each) |
| Warranty | Yukon Gear limited warranty |
What's Included
- 2x shims at 0.003in thickness
- 2x shims at 0.005in thickness
- 2x shims at 0.010in thickness
- 2x shims at 0.015in thickness
- 2x shims at 0.020in thickness
- 2x shims at 0.030in thickness
Frequently Asked Questions
Q: What differential does the SK M20-3 fit?
A: The SK M20-3 is designed for the AMC Model 20 rear differential used in 1968-1986 AMC and Jeep vehicles, as well as the Hummer H1.
Q: What shim thicknesses are included in the SK M20-3?
A: The SK M20-3 includes 2 shims each of 0.003in, 0.005in, 0.010in, 0.015in, 0.020in, and 0.030in for a complete range of end play adjustment.
Q: What is axle end play and why does it matter?
A: Axle end play is the amount of lateral movement allowed in the axle shaft. Excessive end play causes noise and premature bearing wear. Shims are used to control this clearance within the manufacturer's specified range.
Q: Does SK M20-3 fit the Jeep CJ7?
A: Yes. The SK M20-3 fits the 1976-1986 Jeep CJ7, which uses the AMC Model 20 rear differential.
Q: Is this kit compatible with the Hummer H1?
A: Yes. The SK M20-3 covers the Hummer H1, which uses an axle configuration compatible with the AMC Model 20 shim dimensions.
Q: Does this product come with a warranty?
A: Yes. Yukon Gear products are backed by a limited warranty. Under the Magnuson-Moss Warranty Act, using warranted Yukon Gear parts does not void your vehicle's factory warranty when correctly installed.
Q: Can SK M20-3 be used during a full axle bearing replacement?
A: Yes. The SK M20-3 provides the shim selection needed to correctly set axle end play after installing new axle bearings in the AMC Model 20 differential housing.
Q: Is professional installation recommended?
A: A dial indicator is required to accurately measure axle end play. Professional installation is recommended for correct shim selection and proper end play setting.
Installation Instructions
- Raise and support the vehicle safely. Remove the axle shaft(s) from the AMC Model 20 housing.
- Remove the existing axle end play shims from the axle tube end.
- Install the axle shaft back into the housing without any shims and measure axle end play using a dial indicator against the end of the shaft.
- Subtract the specified minimum end play value from the measured end play to determine the required shim pack thickness.
- Select the appropriate combination of shims from the SK M20-3 kit to achieve the specified end play (typically 0.001-0.005in).
- Install the selected shim pack on the axle tube, then reinstall the axle shaft.
- Recheck end play with the dial indicator and adjust as needed.
- Reinstall all retaining hardware, brake components, and wheels. Torque all fasteners to specification.
- Check for any leaks and road-test before returning to service.
Proposition 65 Warning: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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