Hmm, Ive had. Stock tires, no vibrations, replacement winter tires, no vibrations, replacement summer tires, no vibration.

Sounds like operator errors to me. 3 different sets of tires on my car, zero vibrations

 

Sound to me based on the speed that it is most likely related to the roads you are driving on. Can you give a better explanation of the vibration?? And since no one else has asked. Do you have any type of suspension mods done to the car?

Richard

 

Ok No mods to the car vibration has been there for 4,500 miles. Get the car to 75 mph you can feel it in the seat and when you look at the passengers seat it's shaking. above or below that speed it's wonderful. Last night while driving it I did notice if your holding it at 75and hit a incline there is a increase in vib with added throttle to keep the speed steady.Beging to think maybe pinion or gear related just wondeering why only at that speed? For anyone who has driven a old Inline 6thisvibration remindes me of those motors. I think also there is now anoise also I can here I would call it a droan. just want it to be fixed cause theres a whole bunch ofparts waiting to be put on.
Thanks for the help.
Car has been driven on texas, oklhoma, missouri,arkansas roads and vibritated on all.

 

I had the exact same vibration until recently. read this thread:
https://mustangforums.com/m_1563734/...tm.htm#1563734

I decsribe my problem on and after page two. In my case, it was (apparaently) the driveshaft.

 

I haven't noticed any vibration. My steering wheel shock when i first bought it, but it flattened right out after 50 miles. My passenger seat sure as hell doesn't shake at 70-75mph. Is this vibration on smooth roads?

 

Nope... Its at the mall, in the parking lot... where else?

 

Very helpful! Thanks for your participation.

 

Thats more then a vibration if you can see the back seats shake man... I feel for ya and that sucks! See what the tires do then shoot for a driveshaft

 

Vibration is there on every highway it's been on. Smooth rough 2 lane 4 lane it doesn't matter.The more
I think about this it's atspeed so would'nt it make more since for driveshaft imbalance than rear gear.
Just dropped it off at the dealer AGAIN!

 

No vibration from 0-100 for me