Make your differential perform even better than it did from the factory with one of Ford Racing's 8.8 in. Traction-Lok rebuild kits. These rebuild kits allow you to do the job right and can save you a big chunk of change by rebuilding in lei of having to do a complete total replacement. Performance to mileage, or a little in between, no one knows how to make your Ford perform better than Ford Racing, so make them your #1 source for performance parts for your Ford vehicle. Traction Lok Rebuild Kit; Fits All 8.8 in. Traction-Lok Differentials; Carbon Fiber Clutch Pack And Shims;