• 1963-2001 GM RWD Transmission mount shims are useful for tuning drive train and drive shaft angles.
• These shims are designed to work with the late model GM style single centered stud mounts, or the early model GM style dual stud mount with 1-1/2″ between hole centers.
• The base dimensions of 1-1/4″ x 2-3/4″ provide a solid contact between the transmission mount and the transmission crossmember.Attempts to use a standard flat washer as a shim will never provide the same contact or rigidity which these precision shims accomplish.
• These aluminum shims are 1-1/4″ x 2-3/4″ x1/8″.
• This set of 4 individual shims allow adjustments from 1/8″ to 1/2″.
• Note: Check your transmission mount to assure it has the same pattern dimensions prior to purchasing.
• Looking for more transmission mount information? Check out our blog article, “What is a Transmission Mount?”

NOTE: Transmission Mount Shims are non-refundable.