Ball Differential: SRT by Traxxas
Designed for all out competition, this Pro Ball Diff features dual ball bearings, metal thrust bearing ring and carbide differential balls for the smoothest operation possible. Our patented mechanism allows instant trackside adjustment without disassembly.
This product was added to our catalog on March 19, 2008.
Be sure to loosen your slipper by 1/2 a turn than usual!
My edit was a flaw in my judgment. Another part is getting a bad review.)