Traxxas Part #4981X: Spool; eliminates differential, (T-Maxx 2.5/E-Maxx)
Spool (eliminates differential, use off-road only)(requires #4981 ring gear)
The differential spool replaces the rear differential gear to provide equal power to both wheels no matter what the truck drives over. If you’re building a T-Maxx® or E-Maxx® truck for straight-line sand drags, hill climbing or pulling, you can replace the rear differential with a spool for increased traction.