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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 424 (Automatic Transmission - 6T75 (M7V M7X) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Harsh Garage Shift

Harsh Garage Shift

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
Checks Causes
Input Carrier Assembly (470) Inspect for worn or stripped ring gear splines
Case Assembly (51)
  • Check the engine for diagnostic codes. If the engine controller signals the transmission that engine torque is inaccurate, the transmission will command high line pressure.
  • Check line pressure at idle is below 800 kPa.
  • Inspect for stuck valves in the lower valve body, particularly the boost valves.
  • Inspect for damaged or fatigued 1-2-3-4 clutch wave plate (458) and low and reverse clutch wave plate (450).
  • Inspect for stripped or worn splines on 1-2-3-4 clutch plate (456).
  • Inspect for improperly positioned or plugged low reverse piston (408) air bleed.
  • Inspect for correct fluid level.
Low and Reverse Clutch Assembly (OWC) (455) Inspect for stripped or sheared internal and external splines on the low and reverse clutch assembly (455).
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