I have a 2005 f 150 XLT 4.6 4X4 with 80.000 miles on it. the is a strange hum or like a zipping noise coming from under my center console. I though it was my transfer case but that is located under my front seat. Is there a place to grease on the drive shaft from the transmissions to the rear end. if there is is there a Zerk or do I need a needle to grease it. thanks.

 

The u-joints are completely sealed - no zerk, no place for a needle.