TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73 H77603FM 5" in diameter and has

5" in diameter and has straight vane for cooling and strength

1968-1972 Chevrolet Impala

this unit is simple to calibrate and designed with the type of durability you expect in an AutoMeter gauge

 Lap Belt Adjusts 40†³ to 78†³

The new aluminum medium dish structure allows the wheel to come towards the driver to facilitate the usage of aftermarket MPI hubs or quick releases

TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73 H77603FM 5" in diameter and hasGM '63 '73 Powerglide Adjustable Vacuum Modulator Valve. This TCI Adjustable Modulator Valve is designed specifically for GM '63 '73 Powerglide Transmissions. The vacuum modulator is a vital component of automatic transmissions. It tells the transmission what kind of load is being put on it, allowing the transmission to react with the proper line pressures and shift points. Over time, modulators can develop leaks, suffer ruptured diaphragms, become