Differential Locker Spool - Traxxas

Differential Locker Spool - Traxxas


Hot Racing 



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Hot Racing front or rear differential spool locker, fitting multiple Traxxas vehicles. See comments section below for fitment. This is the NEW revision of this item that features a wider range of vehicle compatibility


  • Steel shaft and 6061 aluminum gear hub construction
  • Steel shaft is black oxide finished
  • Aluminum hub is blue anodized
  • The locker/spool eliminates differential action for greater acceleration and climbing. It is recommended for off-road use only

In the Package:

  • One (1) differential spool


  • Output shaft diameter: 6mm
  • Overall length: 45mm
  • Driveshaft screw pin thru hole: 2.5mm
  • Weight w/o screws: 16g


  • Recommended to use a removable-type locking adhesive on screws threading into metal
  • Check hub setscrew for proper torque prior to installation
  • Ring and pinion gears and factory Traxxas 5380/3979 differential housing, 5118 8x16x5mm bearing, and 5119 10x15x4mm bearing


  • Replaces entire Traxxas 5381 differential assembly to lock the axle
  • Compatible with:
  • E-Maxx
  • E-Revo
  • Revo 3.3
  • Slayer Pro 4X4
  • T-Maxx 3.3

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