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Reverse Servo (4L80-E): Installation

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the rear servo assembly into the transmission case as follows:
    • Accumulator spring (14).
    • Selective pin (13).
    • Servo spring retainer (12).
    • Servo spring (11).
    • Washer (10).
    • Piston seal (9).
    • Accumulator piston (8).
    • Inner ring oil seal (7).
    • Outer ring oil seal (1).
    • Servo piston (2).
    • Bottom retaining clip (3).
    • Cover gasket (4).
    • Cover (5).
    • Cover Bolt (6).
  2. Install the cover bolts and tighten the bolts to specification. See TORQUE SPECIFICATIONS .
  3. Install the transmission oil pan and filter. Lower vehicle. Fill transmission with appropriate fluid to proper level. See LUBRICATION .
Fig 1: Removing & Installing Reverse Servo Assembly
G00089920Courtesy of GENERAL MOTORS CORP.
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