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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (AUTOMATIC TRANSAXLE DIAGNOSIS - 4T65-E)TROUBLE SHOOTINGTORQUE CONVERTER REPLACEMENT GUIDEFUNCTION/APPEARANCE CONDITIONS
1999 GMC Forward Control 5.7 R, Automatic

Function/Appearance Conditions

1999 GMC Forward Control 5.7 R, AutomaticSECTION Function/Appearance Conditions
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If torque converter requires replacement, see REMOVAL & INSTALLATION - CENTURY & REGAL article.
  • If torque converter is discolored/overheated, replace the torque converter.
  • If broken/cracked flexplate, replace the torque converter.
  • If stripped converter bolt holes, replace the torque converter.
  • If torque converter pilot damaged, replace the torque converter.
  • If torque converter ballooning, replace the torque converter if end play exceeds .3 INCH (.7 mm) using Converter End Play Checker (J 35138).
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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.