(see application pages for more detail) Solid Pinion Bearing Spacer with Shim Pack - 12 bolt GM Auto Axle 4101$33.00 Solid Pinion Bearing Spacer with Shim Pack - 8.75 (489 case) Chrysler Axle 4103$33.00 Solid Pinion Bearing Spacer with Shim Pack - 7.5",8.8", 9" Ford Axle 4105$15.00 Solid Pinion Bearing Spacer with Shim Pack - 12 bolt GM Truck Axle 4107$33.00 Solid Pinion Bearing Spacer with Shim Pack - 8.5" GM, 9.25 Chrysler Axles 4109$17.00 Solid Pinion Bearing Spacer with Shim Pack - 63-79 Corvette Axle 4110$34.00 Solid Pinion Bearing Spacer with Shim Pack - 7.5",8.2" GM Axle 4111$17.00 Solid Pinion Bearing Spacer with Shim Pack - 9" Ford Axle (35 spline) 4113$53.00 Solid Pinion Bearing Spacer with Shim Pack - 8" Ford, 7.25",8.25" Chrysler, 7.75 GM Axles 4114$17.00 Solid Pinion Bearing Spacer with Shim Pack - Viper Axle 4116$45.00 Replacement Shim Pack for 4101, 4103, 4105, 4107, 4109, 4110, 4116 1107-A$12.00 Replacement Shim Pack for 4111, 4114, 1131$12.00