Okay so please help me out here, I have a 04 Dodge Ram 1500 5.7L 2WD. I have tried many things so far and cant figure out why it shakes at highway speeds (65-above). I have replaced both wheel hubs, and all balljoints and tie rod ends, got an alignment and rotated my tires and it still shakes after all those things. I dont know what else it could be besides maybe balancing tires but it made the same vibration before i rotated so i doubt all four tires are badly out of balance. Any suggestions?

 

steering rack... you should have seen mine, my man.. it was a curious wonder I could direct that trucks path at all..

play develops in the rack and that play is most obvious at highway speeds.. get it fixed.. it isn't something to goof around with..

 

Vibration at accel and decel different?? Driveshaft/U joint !! If same , tires .. period !!

 

which is what I thought too... until I found out otherwise..

op: does it go bezerk when you brake at highway speeds?

 

Well depends if it vibrates in front and shakes steering wheel or if the back end shakes, mine along with some others I know had same problem(back end shaking), I changes my brake rotors first just thinking easy fix and nope still shaked so I went ahead and changed U Joints and that took about 85% of the shake out so it's now ok to drive at them speeds and Not be so bad but I believe one of my friends driveshaft was out of balance and that fixed his problem but he also replaced U Joints while driveshaft was off so it could have been either or

 

doesnt go bezerk while braking at highway speeds, and its the same vibration but only once i get to highway speeds. and i can feel it in the steering wheel

 

if it is the rack what goes bad? a seal or what?

 

Bent rim? When was the last time you re-balanced tires? Tires go out of balance as they wear. less rubber than when there where new. Start with the simple things first. Good luck, let us know what fixes it.

 

Make sure all the tires are round with no knots in them or separation also

 

tires are wearing evenly so that looks good, ill try balancing them but i found PS fluid in one of the bellows in my PS rack so.... looks like i need a new rack, im guessing thats where my vibration is coming from but i could be wrong