Savage 21 44T First Gear Delrin Low-Wear Replacement DSAV1644T1T by GPM  [DSAV1644T1T]

44T Delrin replacement for Savage 21 two-speed

This replacement is a Delrin 44T first gear made to suit the HPI Savage 21 two-speed gearbox, supplied as 1 pcs. It serves as a direct replacement for the original first-gear part and is aimed at owners maintaining or tuning scale RC drivetrains.

Delrin gives a lower friction interface with metal gears, helping reduce wear in the first gear position. When installing, check the gear mesh, axial endplay, and that the two-speed selector dog engages cleanly to avoid premature wear.

Fitting advice: strip the gearbox cover per your Savage 21 service guide, note shim and bearing positions when replacing the 44T, and confirm differential and spur alignment before final assembly. Perform a slow test run to confirm shifting and revisit mesh after a short running period.