Control Valve Assembly
WARNING: This page does not describe the selected car, but rather 124 other vehicles, including the 1991 Chevrolet Pickup, 1991 Chevrolet Cab & Chassis, 1988 GMC Vandura Special, 1988 GMC Vandura, and 1988 GMC Value Van. However, it is still accessible from the selected car via links, so may be relevant.
Remove control valve attaching bolts, manual detent spring and roller. Note size and location of each bolt for reassembly reference. Remove governor oil pipes from case and rotate away from holes. Remove governor oil screen from inboard hole. Remove control valve assembly.