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Home >> Buick >> 1987 >> Electra Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul - 200-4R >> Transmission Disassembly >> External Parts >> Notes

External Parts: Notes

  1. Mount transmission in a holding fixture and remove torque converter. Rotate transmission so that oil pan is facing up. Remove oil pan and gasket. Remove oil filter intake pipe and "O" rings. "O" rings may be located in pump bore.
  2. Disconnect wire leads at electrical connector and pressure switches. See Fig 1 . Using a 3/4" box wrench to compress connector tangs, withdraw electrical connector and "O" ring from case. Remove converter clutch solenoid assembly bolts, clips and solenoid.
    Fig 1: Bottom View of Transmission Case
    G96H15880Courtesy of GENERAL MOTORS CORP.
  3. Using care not to bend throttle lever link, remove throttle lever and bracket assembly. T.V. exhaust valve lifter and spring may separate from lever and bracket assembly. Remove manual detent roller and spring assembly, signal (Drive "2") oil pipe retaining clip and oil pipe.
  4. Remove 4-3 pressure switch and retaining bolt. Remove remaining bolts attaching valve body to case. Identify bolts for replacement in correct location during reassembly. Hold manual valve in bore and carefully lift control valve assembly from case. Care must be taken as 3 check balls are located on top of spacer plate-to-valve body gasket. Remove check balls.
  5. Remove 1-2 accumulator housing. Withdraw spring, gasket, plate and piston from housing. It may be necessary to apply low air pressure (approximately 3 psi) to orifice in accumulator housing passage to remove piston.
  6. Remove control valve assembly gaskets and spacer plate from transmission case. Withdraw 3-4 accumulator spring, piston and pin from bore in case. It may be necessary to apply low air pressure (approximately 3 psi) to orifice in case core passage to remove piston. See Fig 2 .
    Fig 2: View of Case Core Passage
    G96I15881Courtesy of GENERAL MOTORS CORP.
  7. Remove 9 check balls from the core passages in the case. See Fig 3 and Figure . Remove governor cover and gasket from case. Remove governor assembly while rotating output shaft counterclockwise to ease removal.
    Fig 3: Removing Check Balls From Case
    G96J15882Courtesy of GENERAL MOTORS CORP.
    NOTE: DO NOT  use pliers to remove governor assembly.
  8. Pry intermediate servo cover retaining ring from groove in case. Remove servo cover and discard seal ring. Remove servo piston and band apply pin from bore in case.
NOTE: Before continuing with transmission disassembly, check for proper intermediate band apply pin as follows.
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