1. Throwout Bearings.
I have a 91' ZF S6-40 Transmission (Black Label) Parts List No 1052-000-035 with a collar diameter of 1.373 inches and a 94'-95' ZF S6-40 Transmission (Blue Label) Parts List No 1052-000-087 with a collar diameter of 1.305 inches.
Post 38 - Throwout Bearings and Clutch Forks
Post 241 - Rebuilt Black Label Transmission Installed and New Driveshaft U-Joints