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Possible Causes

Possible Causes 
LOW FLUID LEVEL
ABS DTCS PRESENT
TRANSMISSION SOLENOID, SPEED SENSOR AND/OR OTHER ELECTRICAL RELATED DTCS PRESENT
INTERMITTENT STICKING VALVE IN THE VALVE BODY
INTERNAL TRANSMISSION PROBLEM
TRANSMISSION CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure   .

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