2004 and later Ford Explorer and Mercury Mountaineer – erratic Transfer Caser Operation and Codes

4410 Gasket
2004 and later Ford Explorer and Mercury Mountaineer – erratic Transfer Caser Operation and Codes

 

These vehicles use Borg Warner 4405, 4406, 4410 and 4411 transfer cases which require a special gasket to complete the ground circuit for the transfer case. The bolts used to attach the transfer case to the transmission have an anti-corroding compound on them and do not provide a proper ground.  Because of this, the gasket has a metal ring at one of the bolt hole locations to complete the ground. Using a non-grounding gasket will generate a series of transfer case codes and cause erratic transfer case operation. The part number for the gasket is: 4L2Z-7086-AA

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