[DeTomaso] Lowered Pantera equals VIBRATION

[sean mundy]

This past week I was experimenting with my ride height.  I lowered the car a couple inches but still had lots of clearance all the way around and then took it out for a spin.  Under hard acceleration there is a bad vibration coming from the rear end.  I didn't have this before the lowering so I'm guessing its not a wheel balance issue?  I then raised the car back up to where I had it before and no more vibration under acceleration.  

I checked the wheel nuts were all tight and all my axle bolts tight. When lowered, could my axles be causing the vibration because they have changed angles and under acceleration the angle is even more severe?  Are they out of balance? Any other ideas ?