I have a 98 Ranger, 4.0 Had to put new lower ball joints. We had the front end lined up but there seams to be something worn, you get a shimmy at around 50 and it get some what worse the faster you go. But I can kind of feather the excelerator to where it is not pushing the truck or backing off and it will smooth out a lot. It acts kine something is worn like a universal but all are tight. Nothing is worn, the ford dealer told me it was my tires, changed them and it still does it. I am ready to just run it till something breaks then I will know what was wrong. Any help would be appreciated

 

Check you front diff mounts and rear u bolts. Maybe the diff is slightly moving when torque from the engine is applied causing the u joints to bind. Or it could really be bad U joints.

 

bring it some one to Balance your tires f the dealer they said the same thing to my mom ford van i had a body rebalance the tires now it fine

 

yeah id get your tires balanced out again just to be sure. take it there and tell them you have vibrations and hopefully they will take care of it right. its easy to skimp on how well you balance tires to save time

 

Take it somewhere else and have them balance and Roadforce your tires.(If their machine can Roadforce Balance) Also have them check the run out on your wheels to make sure they are not bent.