Superior TRACTION + HANDLING: Upgrade a factory open differential without removing the transaxle. Decrease torque steer on all surfaces and improve grip on wet roads, in snow, ice, and in general rally conditions. This shim kit makes an open differential behave more like a plate-type race diff but without any of the ill side effects.

Volkswagen designed in a similar solution at the factory. Placed behind the drive flanges and spring retainers are locking rings that put pressure on the the trunion shaft and the differential housing. These preload the differential and provide a very slight amount of limited slip assistance. However, the original parts are made of silicone bronze which is very inflexible and brittle. They break in several places and become completely useless over time.

Whereas, our shims are made of brass. This material is more flexible and locks more aggressively. It also transmits less heat to gear oil, the differential housing, axle shafts, axle flanges, and CV joints. Thus, instead of failing after several thousand miles, it will perform year after year.

Our shim kit includes: pair of CV flange seals, 2x C-clips, 3x brass shims, thrust washers, and steel puck seals with O-rings.
Fits:
Mk1 Golf/Rabbit, Cabriolet, Pick-Up ("Caddy"), MK1 Jetta, Mk1 + MK2 Scirocco
Mk2 Golf/Jetta
Mk3 2.0 ABA Golf/Jetta
Note: Best implemented on 1984+ transmissions with 100mm flanges. If you have 90mm and your transmission is from 1984 or later, a small amount of filing/grinding is required to custom fit. If your gearbox is from 1983 or earlier, this kit will almost definitely not fit. Installation is easy with the transmission in place.