HPI Savage 21 2-speed 39T Delrin second gear DSAV1639T2T by GPM  [DSAV1639T2T]

39-tooth second gear for Savage 21

This Delrin second gear is a replacement part for the HPI Savage 21 platform and is identified as DSAV1639T2T. The material choice gives lower friction engagement in the gearbox and helps maintain repeatable shift behaviour during rough running.

The item is supplied as a 1 pcs set and includes the mounting screws stated in the original product name. It is intended for direct replacement in compatible Savage 21 two-speed gear sets where the 39-tooth second gear is required.

Assembly notes:

• Verify gear mesh and axial clearance before locking components down to avoid premature wear.
• Inspect spur and pinion for pitting or rounding and renew if necessary to protect the new gear.
• Begin with hand-tight screws, then torque evenly to prevent distortion.

Performance role:

• Install this Delrin second gear to help preserve smooth shifting when running stock or mildly tuned drivetrains.
• Delrin lowers internal friction to aid shift quality but does not change ratios; fit alternate tooth counts to alter gearing.