ivaan

Hello everyoneee,

well, I have had this problem since i got my truck,
it runs smooth in the city but when i get on the highway
especially when i go 45MPH and above it starts to vibrate,
then when i get to 60MPH it feels a little less but still vibrating..
I already balanced the 4 tires a week ago and it still vibrates a lot :/
any help!? or ideas of what this is? :D thxx

fordo66

The way you describe it, it sure sounds like a u-joint going bad. At 45 mph as you say is where it is the worst and then gets better as you increase speed points right to a u-joint. Check it out and let me know what you find.

Jeff

Big Block Ford

If the vibration is in the steering wheel then it is still likely to be a problem with the front tyres or perhaps the rims.

If it is a general vibration through the vehicle then maybe the u-joints or the rear tyres/rims

__________________
Lance
71 429SCJ Mustang

fordo66

If it's in the steering wheel then I would look to a tire. One way to check a tire for an issue that will create vibration is to first at a crawl in a parking lot or something let go of the steering wheel and see if the steering wheel rocks back and forth. This could indicate a broken belt under the tread. Usually this will also create a pull to the right or left depending on which side of the vehicle it's on. If you get no indication from that put the front tires on the back and see if the vibration moves to the seat and out of the steering wheel. If it does then narrow it down to the bad tire.

AtlMax

I have the exact same problem at the exact same speeds, 45 and 60, on my 05 3.0. My problem reared it's ugly head imideatly fallowing both U-Joints being replaced. Kinda got me scratching my head.

jimbot58

You could many causes including a defective tire, bad shocks, improperly balanced tires (Sometimes tire jockeys lack proper training or experience) even water left inside the tire! (This happened to a friend) Check the tires for any obvious damage, such as cuts or missing treads, bulges, cracks indicating dry rot and or sun damage, exposed cords and any signs of the tread de-laminating from the carcase of the tire, usually caused by driving on underinflated tires. That is a good suggestion to move the tires front to back and visa-versa to see if it changes. If it remains the same, I would look to the u-joints or other mechanical areas. Check the front end (or have it checked) for worn ball joints, tie rods, idler arm, etc. and any signs of leakage on the shock absorbers. Even improperly adjusted wheel bearings.

As to AtlMax-I would bet that either the u-joints or the drive shaft it self was damaged during the repair. Needle bearings can be lost or damaged if the bearing caps are not held in place during the install and the yoke of the driveshaft can be bent if incorrect procedures were used during u-joint replacement.