Corvette C4 Shim Kit

Corvette C4 Shim Kit to help quite down the noisy ZF transmission when using a solid flywheel. This countershaft shim will significantly reduce the gear rollover noise the zf tranny makes when not under a load. The factory installs a 75 thousandths shim which we replace with a 80.5 shim to cut down on all the gear rollover noise caused by the countershaft.