HPI Savage Differential Lock Alloy Upgrade SAV1025 by GPM  [SAV1025]

Alloy diff lock for Savage trucks

This alloy differential lock is an RC-scale drivetrain component made for HPI Savage platforms, covering Savage, Savage X and Savage K4.6. It replaces the stock diff internals to deliver firmer engagement aimed at tuning traction and load transfer in demanding off-road conditions.

Fitment targets the Savage family and follows standard differential replacement steps: fit the unit into the existing diff housing and secure with the original fasteners. Verify pinion and spur mesh and check clearance before final assembly, then rotate the drivetrain through suspension travel to confirm smooth operation.

From a setup perspective, this differential lock reduces uncontrolled slip during acceleration and braking, making throttle response and weight transfer more consistent on loose or high-traction surfaces. Use it alongside gear choice and shock tuning as part of a wider drivetrain setup strategy.

After heavy use inspect the engagement surfaces and bearings, clear away debris and reapply suitable differential grease to preserve consistent behaviour and service life.