Okay guys I'm new to this website. And I have a 2001 f150 5.4 . And my rear end is squeaking when I accelerate. From what I have seen it sounds like it's a u-joint. The other day I was on the highway going around 65 and it started to shake but about an hour later when I got out of town I went that fast and it didn't shake at all. All it does now is squeaks. Any input would be greatly appreciated,
Thank you