Hey guys I was wondering if anyone could tell me what could possibly be causing my firebird to vibrate. Its usually pretty bad when I 'am traveling the intersate. The car vibrates and so does the steering wheel. Any info would be Great! Thanks everyone!

Jason Burnett

 

Could be your tires need balancing or if you have a steel driveshaft it could be out of balance.

 

My 87 TA had a vibration between 45-65 mph. Turned out to be a worn out ouput shaft and yoke on the tranny.

I upgradded to a factory aluminum driveshaft to help fix the vib when I changed the yoke and output shaft.

 

Start with the simple stuff. Most likely out of balance tires, a separated tire, or a bent wheel.

And dont forget anything on that rotating assembly that isnt even will cause a vibration. Lugnuts with large size or weight variations, heavier valvestem caps like the light-up ones or something (need to be on the wheel when it's balanced), and something inside the tire like fix-a-flat can all cause vibration issues.

(Fix-a-flat itself will disperse when you get up to speed, but what causes the vibration is most wheel balancers will not spin a tire long enough to let the fix-a-flat spread around, therefore you get an inaccurate readout from the balancing machine and shifting weight numbers making it virtually impossible to properly balance the tire.)

 

Yup, while its in the air for the tires, grab the driveshaft near the yoke at the tranny end and see if the yoke has any slop in the tail housing.