"Something in the Orange"
As long as I had orange car, it had a mild vibration at higher speeds. Changing the stance did not help so I spent a fair amount of time trying to understand my pinion angle. Without the proper tools, I spent about as much time attempting to get good angle measurements. The first thing I did however, was drop the car off at a drive shaft shop in Houston. They balanced it and installed new universal joints yoke and aft. I remember not being very happy on the drive back up north as it seemed to vibrate even more. I learned a couple things from members here and through experimentation; That flipping the driveshaft 180° and reinstalling it has an effect, as does centering the bearing caps and tightening the retainers to spec!
I was reasonably sure however that I also had a +2° variance in the pinion angle so I installed some shims. i think the car felt more responsive to the throttle but I still had a little roving rumble at about 70-80mph. Oddly, I tried an old counter balance to the tail of the transmission and that ironed the last of the vibrations out of the car. I'll try to find a photo of it, I remember a post on here around that time....
As long as I had orange car, it had a mild vibration at higher speeds. Changing the stance did not help so I spent a fair amount of time trying to understand my pinion angle. Without the proper tools, I spent about as much time attempting to get good angle measurements. The first thing I did however, was drop the car off at a drive shaft shop in Houston. They balanced it and installed new universal joints yoke and aft. I remember not being very happy on the drive back up north as it seemed to vibrate even more. I learned a couple things from members here and through experimentation; That flipping the driveshaft 180° and reinstalling it has an effect, as does centering the bearing caps and tightening the retainers to spec!
I was reasonably sure however that I also had a +2° variance in the pinion angle so I installed some shims. i think the car felt more responsive to the throttle but I still had a little roving rumble at about 70-80mph. Oddly, I tried an old counter balance to the tail of the transmission and that ironed the last of the vibrations out of the car. I'll try to find a photo of it, I remember a post on here around that time....