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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 588 (AUTOMATIC TRANSAXLE - 4T65-E (INTRODUCTION, SERVICE & REPLACEMENT))REPAIR INSTRUCTIONSTRANSMISSION REPLACEMENT (LY7)REMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Transmission oil circulates between the transmission assembly and the transfer case. In situations where transmission related failures circulate debris into the transfer case, the transfer case must be disassembled, cleaned, and inspected for damage.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    2. Fig 1: View Of Transmission Lower Bell Housing Bolt
    GM1395562Courtesy of GENERAL MOTORS CORP.
  2. Remove the transmission lower bell housing bolt located between the engine oil pan and the transmission oil pan.
  3. Remove the powertrain (engine, transmission and frame) from the vehicle. Refer to Engine Replacement in Engine Mechanical - 3.6L (LY7).
  4. Remove the filler tube. Refer to Fluid Filler Tube Replacement (LA1)  or Fluid Filler Tube Replacement (LY7) .
    5. Fig 2: Identifying Transmission Bell Housing Bolts
    GM1395501Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission bell housing bolts (2).
  6. If the vehicle is equipped with All-Wheel-Drive (AWD), remove the transfer case brace. Refer to Support Brace Replacement (LA1) or Support Brace Replacement (LY7) in Transfer Case-Steyr.
  7. Remove the coolant inlet pipe. Refer to Coolant Pipe Replacement - Inlet in Engine Cooling.
  8. Remove the transmission mount with the transmission mount bracket. Refer to Automatic Transmission Mount Bracket Replacement .
  9. Remove the starter motor. Refer to Starter Motor Removal in Engine Mechanical - 3.6L (LY7).
  10. Remove the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement (LA1)  or Flywheel to Torque Converter Bolt Replacement (LY7) .
  11. Remove the transmission lower brace. Refer to Automatic Transmission Brace Replacement (LA1)  or Automatic Transmission Brace Replacement (LY7) .
    12. Fig 3: Identifying Transmission Upper Brace Nut
    GM1395483Courtesy of GENERAL MOTORS CORP.
  12. Remove the transmission upper brace nut located behind the power steering pump and above the transfer case.
    13. Fig 4: Locating Transmission Bell Housing Bolts
    GM1395484Courtesy of GENERAL MOTORS CORP.
  13. Remove the transmission bolt near the crank sensor and the engine coolant (block) heater.
  14. Separate the transmission from the engine.
  15. If the vehicle is equipped with AWD, remove the transfer case. Refer to Transfer Case Removal in Automatic Transaxle - 4T65-E Unit Repair.
  16. Flush the transaxle oil cooler and the transaxle oil cooler hoses. Refer to Automatic Transmission Oil Cooler Flushing and Flow Test (J35944-A) or Automatic Transmission Oil Cooler Flushing and Flow Test (J45096) in Automatic Transmission - 4T65-E.
RENDER: 1.0x

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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.