Motor Grader Differential Assembly – Ratio, Housing and Axle Guide
A motor grader differential assembly divides torque across the axle. Assemblies that share a housing shape may use different ratios, side gears, bearing settings or locking arrangements.
Ordering basis: Confirm axle identification, ring-and-pinion ratio, carrier housing, bearing locations and shaft splines.
Differential identification evidence
Record axle plate and carrier casting numbers.
Count ring and pinion teeth when service data is unavailable.
Measure flange, pilot and side-gear spline interfaces.
Identify locking, limited-slip or conventional configuration.
Determine the cause of gear damage
Noise, metal debris or broken teeth can follow low lubricant, bearing preload loss, backlash error, contamination or mismatched tyres. Inspect the axle before installing another carrier.
Setup is more than bolt-on replacement
Use the axle service procedure for bearing preload, backlash and tooth contact. Clean the housing and oil passages, fill with the specified lubricant and monitor noise and temperature during run-in.
Product record
| Component | Axle differential assembly |
| Part number | Not shown — verify from the original component or parts catalogue |
| Fitment rule | axle model, gear ratio, housing interfaces, spline data and machine serial number |
Related product reference
Review the motor grader gear matching guide for another component-level identification workflow. The linked product is a reference only and does not establish interchangeability.
FAQ
Can different differential ratios be mixed on one machine?
No. Ratio mismatch can create driveline wind-up and component damage.
What proves the ratio?
Use the axle data, gear markings or verified ring-and-pinion tooth counts.
Why inspect the housing after gear failure?
Debris, damaged bores or bearing movement can quickly ruin a replacement.
Compatibility note: Axle identity, ratio and spline interfaces must all match.
