This is the optional Differential Spool for the Traxxas Revo, TRAC71**.
FEATURES:Constructed of steelInstalls in diff housing on either front or rear wheels
INCLUDES:One Differential Spool for the Traxxas Revo with instruction sheet
REQUIRES:Differential Ring Gear and Pinion, TRA5379
SPECS:Length: 2.3" (58.4mm)
COMMENTS:Use only on off-road low-traction conditions to avoid damage to driveline components