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Home >> Jeep >> 2006 >> Commander Base, 3.7 K, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 219 (Final Drive Control Module (FDCM) - Electrical Diagnostics) >> DTC Troubleshooting >> C1421-Rear Differential Clutch Performance >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
WIRING HARNESS INSPECTION
DIFFERENTIAL (MECHANICAL)
REAR DIFFERENTIAL SOLENOID
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