Dbeck002

ok dudes, for the longest while my car has been vibrating at higher speeds not RPMs. how do i know this?

before i got the gears the vibrations would start at precisely 100 MPH. in this case i did not know if it was the engine out of balance or the drivetrain or both.

after i got gears i used a technique as a reference to tell whether or not itwas the engine vibrating or the drive system. at about 90 MPH i felt the exact same threshhold of vibration, this means that it is indeed not engine RPM but Wheel or drivetrain RPM causing this. If i disengage the clutch at 90 MPH it will still vibrate even when the engine is revved low, i suspect the engine has nothing to do with this. I am worried because the vibrations are REALLY bad at around 95-100 with gears and were just as bad at 100-110 before the gears. i have an aluminum driveshaft that came with the car, since the rearend rebuild, a lot of things were replaced like the bearings and bushings and all the neat stuff etc... this leads me to conclude that the vibrations could be coming from the driveshaft/yokes/U-joints or the front disk brakes. what do you guys think could be a potential problem.

bobby

maybe you didnt break in thos gears like theinstruction CLEARLY state, lol

Dbeck002

vibrations were there long before the gears bobbo lol....

bobby

hmmm...... man, i dont know, your tires could very well be out of balance, whens the last time you had em balnced? this sounds like the could definetly be a possible cause

mustang8719

Tires could be out of round.After I got my car I had a vibration like that later I found out one of the axles were slightly bent.Also check for play in the tail shaft of the trans.Try pushing the yolk of the driveshaft up and down and see if there is any play.You should try with the rear wheels off the ground.The tail shaft bushing may be worn.

1994gtchris

my shifter vibrates at about 65 but i think its my wheels.i threw my wheels on a balancer and 3 of them had a whobble.maybe thats what is wrong with yours too?good luck dude -chris-

Mustangous

I would guess the drive shaft. My aluminum drive shaft does the same..I wanted to get it balenced but i took the car off the road before i did that. Not its stripped so ill have to wait. But it sounds like the same as my car. its different then a out of round wheel feel. Can you try a different one, like an old one from someone?

Dbeck002

the vibration is really bad if you hold the shifter ****. if im going 100 now and hold the shifter **** i feel like the tranny will explode because of so much vibrating. this scares me... [sm=smiley6.gif]

bobby

man, im out of ideas, something in the tranny im thinkin anyways off to bed, tty tommrow dbeck

88_5.0

i had that problem and i replaced my u-joints and it helped quite a bit but your still gonna have somewhat of a vibration.