All I’ve been dealing with the notorious vibration issue that starts around 50 mph. I’ve swapped axles twice, installed new tires, and performed a drain and refill on the tranny fluid. I also had the car aligned which shouldn’t cause a vibration. Any other ideas?

 

Check the tie rod ends and lower ball joints for play

 

Thanks for your reply. I’ve checked all this. It’s like clock work. It starts at 50 mph

 

welcome to the forum. vibration at 50 mph. wheel warp or out of balance, tire out of balance. bubble balance not good, must be high speed spin balance. alignment is good. also wheel wobble.

 

I believe the tie rod ends and lower ball joint are suspect
On top of that, the wheel alignment may be off.
A high speed wheel balance is a good idea.

tie rod ends and lower ball joint are probably weak
so when vehicle hits 50 mph the weakness shows up
if they have grease fitting then try filling them with grease
This should stiffen them up a little.

 

Its worth a try. I had the front end checked out when I got an alignment and they said everything was good.

 

you may have to look for a shop that has the old style wheel balance, it spins the wheel on the car and you can see if the wheel wobbles. or jack up the car on good jacks, and take each wheel and tire and place it on the turning shaft and spin it up to 50. be real careful if you do this yourself. always a danger of the car shaking off the jacks.

 

Only a few things more could be causing this issue
Power steering, rack and pinion isn't tight
See if there are any leaks in the power steering system??

 

Oh, don't know if the thread starter found out the issue or not
But, have heard that weak motor mounts can cause these exact issues with vibration at higher speeds.
Check motor mounts and see if they are broken and need replacement.