I'm just checking to see if anyone ever had this problem. When im going down the "track" i get a vibration at 75-85 mph no vibration before 75 no vibration after 85 mph, even past 100mph it runs smooth. if i push in clutch at 80 vibration is still present. ofcourse nothen is stock new trans, driveshaft hasnt solved the prob would the gear set cause this or maybe a twisted axle? any ideas would help

 

what are you driving?

what wheels and tires? is the vibration in the steering wheel?

 

Sorry i ran out of time, its a 72 challenger. My set up is 360 6pack, kiesler 5 speed, 8 3/4 rear with 3.91 richmond gears, rear tires are 275/40/18, front are 215/45/75. driveshaft angle is 2.5 degrees both front and rear.I had the tires rebalanced couple weeks ago. the steering wheel dont shake it feels like it comes from the rear of the car. if i knew how to post a pic i would Thanks again