strange shaking/vibration

[Quikstang]

Ok, just a few days ago i was driving the stang and i noticed this strange shake. it does it at around 20 to 25 mph. I swear it feels like the back tires are coming loose. The first time i started noticing it, I pulled over and checked all my lug nuts. shook the car to make sure the rear end was not coming apart. this is really strange. it feels almost like all the tires have a flat spot at alternating corners, if that makes any since.. has anyone else experienced anything like this....

Corey

 

[BadAndy]

move the back tires to the front

 

[06stangtyme]

Have the tires on the rear checked, You may have a separated tire. Moving them to the front will only make
the stearing wheel shake....

 

[Quikstang]

Draglites with skinnys on the front, so moving the tires is not an option. it only happens at an interval like 10 mph. from about 20 to 25-30 mph. Its really strange. we cant figure out what it can be.

 

[06stangtyme]

Have them check for a separation(belts coming apart).

 

[MUSTANGJOE]

This happened to me, it was the drive shaft that was coming loose!, check the bolts on the drive shaft were it attaches to the diff. good luck