Baffled and Confused (2006 F150)

^ LOL :bigtup:

I use these on my truck…

Went though this on my other earlier thread. I’m 99.9999999999999 % sure it can’t balancing issue. It would be constant.

Ya this seems a lot more like something is binding somewhere with how intermittent it is and speed sensitive. I doubt its an out of balance drive shaft either. Hopefully its not something in the diff