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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1738 (Automatic Transmission - ALLISON - Symptom Troubleshooting And Diagnosis) >> Torque Converter Diagnosis >> Poor Acceleration at High Speed

Poor Acceleration at High Speed

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If the stator is locked up at all times, performance is normal when accelerating from a standstill. Engine RPM and vehicle speed are limited or restricted at high speeds. Visual examination of the converter may reveal a blue color caused by overheating.

You should be able to turn the race clockwise, but should have difficulty in moving the race counterclockwise, or you may be unable to move the race at all.