Hi guys, I have 2003 F150 FX4 supercab XLT. I've read some post on here in the past and they were very helpful, I have a vibration and or thumping in the front end, it is more noticable the slower I drive. I went ahead and changed the wheel bearing hubs and the cv axels on both sides and the vibration/thumping is still there, does anyone have any ideas?

 

Sounds like it could be a bad tire, as in a broken belt or bulge in the sidewall.

 

I thought about that, I have fairly agressive tires on the truck and the tread is getting pretty worn. But if I'm going slow almost to a stop it feels like a grab and release, grab and release, grab and release type of wabble. I read a forum on here about a guy who had a bad vacume line on his transfer case, I was wondering if one side of the 4x4 might be grabbing. I'm going to have the tires spun balanced today to see if thats the problem.

 

Warped rotors and dragging brakes maybe?

 

Don't overlook bad tie rods and or ball joints. Another is the stabilizer bar end links.