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HOMESERVICE MANUALSCHEVROLET1983STEP VAN P20, 5.7 M, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSOVERHAUL - THM 400SERVICE (IN VEHICLE)
1983 Chevrolet Step Van P20, 5.7 M, Automatic, 400/M40

Service (In Vehicle)

1983 Chevrolet Step Van P20, 5.7 M, Automatic, 400/M40SECTION Service (In Vehicle)

The following components can be removed with transmission in vehicle:

  • Governor Cover and Seals.
  • Governor Assembly.
  • Governor Pipes.
  • Intermediate Servo Piston Assembly.
  • Rear Servo Assembly.
  • Front Servo Assembly.
  • Oil Pan and Oil Screen (Intake Pipe) Assembly.
  • Valve Body Assembly.
  • Check Balls and Valve Body Spacer Plates and Gaskets.
  • Pressure Regulator Parts.
  • Manual Detent Roller and Spring Assembly.
  • Parking Pawl Actuator Rod.
  • Parking Pawl Bracket and Parking Pawl.
  • Manual Shaft and Seal.
  • Manual Valve and Valve Link.
  • Extension Housing and Gasket.
  • Rear Seal.
  • 1-2 Accumulator Assembly.
  • Vacuum Modulator.
  • Oil Filter Pipe and "O" Ring.
  • Speedometer Driven Gear Assembly.
  • Cooler Fittings.
  • Downshift Solenoid.
  • Electrical Connectors.
  • Governor Feed Screen.
  • Pump Pressure Screen.
  • Modulator Valve.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.