K 1500 Truck 4WD V8-454 7.4L (1988)
Transmission Vacuum Regulator Valve: Service and Repair
THM 400/475 Transmission
1. Remove modulator attaching screw and retainer.
2. Remove modulator assembly from case and discard O-ring seal.
3. Remove modulator valve from case.
4. Reverse procedure to install, using a new O-ring seal.
