It is known that high power loads tend to concentrate on the small area of the ring and pinion. This makes the backlash setting and maintenance extremely important for the longevity of the final gear. The stock pinion spacer, due to its structure and material, does not have the strength and can be prone to change the backlash and in a worst case scenario, to collapse. Most of the differential noise and blow are caused by this backlash change. J's Racing Special Differential Distance Collar is made of S45C carbon steel and replaces the stock pinion spacer. By maintaining the proper backlash, it prevents the differential problems that can occur.
