I have a bad vibration in my car when i hit 100KM...it vibrates so bad that the passenger seat shakes and you can't look out the back window using the mirror..lol...I have a moser 9in in the rear with 3.89 gears, i have the stock driveshaft, and i have a spoohn adjustable torque arm that mounts to the floor not the tranmission tail housing. I have tried 2 different sets of tires on the rear of the car to eliminate the tires as the culprit. That made no difference.

Please throw any ideas my way as i have about a week to get this ironed out before i go on the dyno for tuning.

Thanks

 

ttt

 

Are you sure it's coming from the rear?

 

well its from the center console back...and i know its not the rear tire/wheels as i tried another set that were just balanced.

 

What is the pinion angle set at?

 

I thought it was set at -2 but i checked it last night and i got 2 different readings....i checked it with just the rear axle jacked up and the front wheels on the ground and when i jacked it up more so i could actually squueze in then i got a different reading...If the pinnion angle was off would this cause a vibration at highway speeds....also seems like the rear suspension is binding when hitting a bump or its aweful tight...