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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (Automatic Transmission - 4L80-E/4L85-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - On Vehicle >> Reverse Servo Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Rear Servo Assembly
    GM512992Courtesy of GENERAL MOTORS CORP.
  1. Install the rear servo to the transmission in the following order:
    1. Accumulator spring (14)
    2. Selective pin (13)
    3. Servo spring retainer (12)
    4. Servo spring (11)
    5. Washer (10)
    6. Piston seal (9)
    7. Accumulator piston (8)
    8. Inner ring oil seal (7)
    9. Outer ring oil seal (1)
    10. Servo piston (2)
    11. Bottom retaining clip (3)
    12. Cover gasket (4)
    13. Cover (5)
    14. Cover bolts (6)
      NOTE: Refer to Fastener Notice .
  2. Tighten the cover bolts.

    Tighten:  Tighten the bolts to 24 N.m (18 lb ft).

  3. Install the transmission filter. Refer to Automatic Transmission Fluid and Filter Replacement .
    4. IMPORTANT: It is recommended that transmission adaptive pressure (TAP) information be reset.
    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain control module (PCM) or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.
  4. Reset the TAP values. Refer to Transmission Adaptive Functions .
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