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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - 4T65-E - Symptom Troubleshooting & Diagnosis) >> Locked Up in Drive/Reverse

Locked Up in Drive/Reverse

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Checks Cause
DEFINITION: The vehicle cannot be moved forward or backward during the following conditions:
  • The engine is running.
  • The transmission is in Drive or Reverse range.
  • The vehicle brakes are not applied.
  • The throttle is closed (idling).
Manual Linkage Misadjusted
Input and Reaction Carrier Assemblies The input carrier assembly (672) or the reaction carrier assembly (675) components are damaged.
Differential Carrier Assembly
  • The park pawl assembly (694) is broken or damaged.
  • The sun gear shaft (689), the internal gear assembly (693), or the carrier assembly (700) components are damaged.
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