I have a 2001 Super Crew with the 4.6 and auto tranny. I recently noticed small amounts of tranny fluid on the driveway that looked like it was coming from the rear transfer case seal by driveshaft. I took it to a trans shop but they said the seal was fine but the yoke was leaking. Is there a seal in the yoke? The fluid seems to be coming from the center of the yoke. I contacted Ford dealer who said a new yoke is $130. I'd hate to buy one if there is a simple fix. Any help would be appreciated.

 

If the yoke is worn or pitted, it will tear up the seal causing the leak. The yoke itself is less then 100$, if somewhere will sell it by itself, and an hour job at a shop. 160$ with labor.