TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73 H77603FM Purpose Built and Modified Chassis

Purpose Built and Modified Chassis Drag Race Cars

Can be used with the following Fuel Filters: 12301

Will fit most side mount fifth-wheel hitch applications

2017-2019 Ford F-250 Super Duty XL Standard Cab Pickup

TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73 H77603FM Purpose Built and Modified ChassisGM '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