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Eaton 912A642 is a driver-selectable electronic locking differential selected by the exact axle, spline, ratio, and dimensional requirements in this listing. Similar Eaton units are not interchangeable across axle families, ratios, spline counts, or shaft dimensions.
Key Features
- Driver-selectable electronic locking
- Open-differential operation when unlocked
- Exact axle and spline application
- Wiring and switch installation required
Fitment
This component is selected by axle family, position, spline count, shaft diameter, ratio range, and exact Eaton part number rather than vehicle year, make, and model. Confirm the installed axle before ordering.
Specifications
| Manufacturer | Eaton |
|---|---|
| Manufacturer Part Number | 912A642 |
| Product Type | Differentials |
| Fitment Type | Axle and specification specific |
| Spline Count | 28 |
| Axle Position | Rear |
| Ring Gear | 8.5in |
What's Included
- One Eaton differential assembly in the exact listed configuration
- Manufacturer packaging and documentation supplied with the exact part number
About Eaton
Eaton manufactures locking and limited-slip differentials, axle service parts, installation kits, and ELocker controls for performance, off-road, towing, and commercial applications. Correct selection depends on the exact axle and differential configuration.
Related Eaton Products
- Eaton Detroit Truetrac Differential 28 Spline 1.20in Axle Shaft Diameter 2.73 & Up Ratio Rear 8.5in
- Eaton Detroit Truetrac Diff 28 Spline 1.20in Axle Shaft Diameter 3.23 & Up Ratio Rear 7.5in/7.625in
- Eaton Detroit Truetrac Differential 30 Spline 1.32in Axle Shaft Dia 2.73 & Up Ratio Rear 8.5in/8.6in
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Frequently Asked Questions
How do I confirm Eaton 912A642 fits my axle?
Identify the axle manufacturer and model, front or rear position, spline count, shaft diameter, carrier break or ratio range, ring-gear size, and any housing revision. Vehicle year alone is not enough.
Does this differential include everything needed for installation?
A differential generally does not replace the axle-specific bearings, seals, shims, ring-gear bolts, lubricant, additive, wiring, or setup tools. Review the exact package contents and order a matching install kit where required.
Who should set up the ring and pinion after installation?
A qualified drivetrain technician should establish pinion depth, bearing preload, backlash, and contact pattern using the vehicle and axle manufacturer specifications.
Installation Instructions
Professional drivetrain installation is recommended. Confirm the axle and component identity before disassembly, inspect all reusable parts, follow current Eaton and vehicle service procedures, establish bearing preload and backlash, verify the gear contact pattern, use the specified lubricant, and test operation before returning the vehicle to service.
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