



RD4039
Upgrade your Ford Mustang limited slip differential with RacingDiffs high-performance clutch plates designed for the Ford 8.8 inch Traction-LOK differential.
This kit is a direct replacement for OEM clutch plates used in Mustang models equipped with 28-spline Traction-LOK differentials. Our friction plates feature a friction coefficient up to three times higher than factory plates, significantly improving traction and durability.
Lifetime Warranty | Direct Bolt-In Installation
This clutch plate kit fits:
*Compatible with Traction-LOK / Posi limited slip differentials.
All components are engineered as a direct replacement for the factory clutch pack.
Prevents separation of the friction layer, a common issue found with factory clutch plates.
Provides optimal friction characteristics and exceptional wear resistance under high load.
Designed to install into the factory Mustang Traction-LOK differential without modification.
For optimal LSD performance we recommend:
Motul Gear Competition 75W140
This oil provides excellent lubrication and stable friction characteristics for clutch-type limited slip differentials.
M-4700-C
Restore the locking capability of your Mustang differential and dramatically improve traction with RacingDiffs high-performance clutch plates.
Engineered for durability, stronger lock and improved driving performance.