High/Low Clutch

Fig 1: High/Low Clutch (First And Second Design)

Courtesy of GENERAL MOTORS COMPANY

The first design high/low clutch can be identified as having a 30 tooth design with a gear tooth outside diameter (a) of 65.50 mm (2.58 in).

The second design high/low clutch can be identified as having a 29 tooth design with a gear tooth outside diameter (a) of 63.25 mm (2.49 in).