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Control Valve Spacer Detent Solenoid, & Front Servo

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.
  1. Install guide pins into control valve assembly attaching bolt holes. Install 6 check balls into ball seat pockets in case. If transmission is in vehicle, install check balls in pockets of spacer plate. See Fig 1.
    Fig 1: Check Ball Location
    G96H15989Courtesy of GENERAL MOTORS CORP.
  2. Install control valve spacer plate-to-case gasket. Install control valve spacer plate. Install detent solenoid gasket and detent solenoid assembly. See Fig 2. Connect solenoid lead. DO NOT  tighten bolts at this time. Install front servo spring and spring retainer in case.
Fig 2: Exploded View of Solenoid & Spacer Plate Assembly
G96A15990Courtesy of GENERAL MOTORS CORP.
Fig 3: Valve Body Oil Passages
G96B15991Courtesy of GENERAL MOTORS CORP.