Installation Procedure

Fig 1: View Of Reverse Boost Valve, Pressure Regulator Valve & Components

Courtesy of GENERAL MOTORS CORP.

Install the pressure regulator valve (1).
Install the pressure regulator isolator spring (3) and the pressure regulator valve spring (2).
Install the reverse boost valve (4) in the reverse boost valve sleeve (5).
Install the reverse boost valve (4) and sleeve (5) in the oil pump cover.

Fig 2: Locating Reverse Boost Valve

Courtesy of GENERAL MOTORS CORP.

Compress the reverse boost valve sleeve into the bore of the oil pump to expose the retaining ring slot.
Install the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve sleeve.
Install the transmission filter. Refer to Automatic Transmission Fluid/Filter Replacement .