TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73 R01J003 and both 2 and 4

and both 2 and 4 wheel drive

Each kit fits Holley® 2 or 4 bbl single carb applications

but usable in any application

Cold formed solid steelVehicle Applications: 1973-1987 Chevrolet C10

2015-2017 Polaris RZR XP 1000 EPS

TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73 R01J003 and both 2 and 4GM '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