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Home >> Jeep >> 2017 >> Wrangler Rubicon, Standard Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> (Transmission Control Module (TCM) - Electrical Diagnostics) >> DTC Troubleshooting >> P1639-TCM Internal-Can 2 Ram Performance >> Possible Causes

Possible Causes

Possible Causes
TRANSMISSION CONTROL MODULE (TCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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