TCI GM Driven Speedometer Gear, 20-tooth blue Momentary Switch If you are doing a

If you are doing a Transmission swap you need our crossmember

Container has molded-in

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The MSD Automatic Coil Selector solves this problem

TCI GM Driven Speedometer Gear, 20-tooth blue Momentary Switch If you are doing aGM Powerglide 200C 375B 475 20 Tooth Speedo Drive Gear.. 20 Tooth Gm Speedo Drive Gear. Speedometer gears include both the drive gear and the driven gear. The drive gear refers to the gear that is on a transmissions output shaft. The driven gear is located in a removable housing, usually in the tailhousing, of transmissions. Be aware that some transmissions will have different driven gear housings depending on the tooth count of the driven gear. TCI