Part 1 step-by-step procedures for overhauling a powerglide in your own garage By C.J. Baker Begin with a thorough inspection of the case, ... Save the modulator pin when you remove the modulator.

Install the vacuum modulator, pin and valve, as shown. Tighten to 15 ft.-lbs. Install the pan with a new gasket. Tighten the pan bolts to 7½ ft.-lbs.