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my mustang vibrates pretty bad between 55 and 85, i changed both u-joints hoping this would fix it but no luck. i had to change the t-5 because it took a crap, but had the problem before this anyways so i ruled the tranny and u-joints, it does have aftermarket gears in it but that was before i owned it, the drive shaft does have some small dents towards the front yolk, any ideas guys?i have had 6 mustangs including a supercharged 90 mustang and never had a prob like this.
Has it always had this vibration? How is the tranny mount? Are the tires balanced good? If the driveshaft is dented it may not be a bad idea to swap driveshafts with another car.
the dents are small, but i work on a open wheel modified dirt car and have had the same prob, the right motor mount appears to be ripped all the way through, but cant tell unless i pull it