GM #3978758 ("large" 8-tooth) 1.84" O.D. Designed for use with nylon gears from 18 teeth to 22 teeth and 3:08-3:70 rear end ratio. NOTE: These gears have 35mm bore, used with 32 spline mainshaft.
Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
