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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L80-E/4L85-E - Overhaul >> Repair Instructions >> Low and Reverse Band Servo Assembly Assemble

Low and Reverse Band Servo Assembly Assemble

    Fig 1: View Of Low & Reverse Accumulator Piston Oil Seal Rings & 1-2 Accumulator Piston
    GM40602Courtesy of GENERAL MOTORS CORP.
  1. Install the new low and reverse accumulator piston oil seal rings (67, 69) on the 1-2 accumulator piston (68). Lubricate the low and reverse accumulator piston oil seal rings (67, 69) with DEXRON® III automatic transmission fluid.
    2. Fig 2: Installing 1-2 Accumulator Piston Spring Assembly & Piston
    GM40603Courtesy of GENERAL MOTORS CORP.
  2. Install the 1-2 accumulator piston spring assembly (88) into the low and reverse band servo piston (65).
  3. Install the 1-2 accumulator piston (68).
    4. Fig 3: View Of Low & Reverse Band Servo Piston Components
    GM40604Courtesy of GENERAL MOTORS CORP.
  4. Assemble the following items, in order, onto the small diameter end of the correct low and reverse band servo piston pin (73):
    1. The low and reverse band servo piston spring retainer (72)
    2. The low and reverse band servo piston spring (71)
    3. The low and reverse band servo piston spacer (87)
    4. The low and reverse band servo piston (65)
  5. Install the low and reverse band servo piston pin retainer ring (64).
    6. Fig 4: Installing Low & Reverse Band Servo Piston Seal
    GM40605Courtesy of GENERAL MOTORS CORP.
  6. Install the new low and reverse band servo piston seal (66). Lubricate the low and reverse band servo piston seal (66) with DEXRON® III automatic transmission fluid.
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