This might have been posted before, but I cant seem to find it.

I have a 1992 ford F150, 5 speed, 4x4 with this 4" rough country lift. There's an issue where if I turn too sharply at corners or on say an on ramp to the highway, the front end shakes terribly and it feels like it's about to fall apart. But if I slow down or turn less sharp it goes away and is smooth. It happens on any corner though. It also started being extremely rough going about 59-63 mph, and if I turn in this range then the front end shakes just as bad again. Above and below she drives as sooth as ever. I've had the front end aligned, the tires rotated and balanced, and the U joints and wheel bearings were changed last week. All I could think it might be was the ball joints. Any ideas? Thanks.

 

Didn't the alignment shop do a complete front end inspection?

 

Sounds like loose front end parts or tire balance, a balance weight could fall off. Wheel balance problem will happen with in a set speed if going straight, a turn could set it off too. If the tires are wearing uneven, that will make them unbalanced!