Spacer blocks

You do have a t5 in the car. Was the angle right on it? I've heard incorrect driveline angles cause that failure too.

if the u-joints failed because of the driveline angles, then they would have failed anyway. 2" lowering blocks change the driveline angles very little overall. likely the u-joints just wore out from time.

Yeah i have had 2"blocks in mine for 4 years now and not a single problem. The blocks are to lower the car not to raise it. So it raises the rear in the car, but the car sits lower. Opposite of most trucks.

Wouldnt lowering using the diffrent eye'd springs still chage your pinion angle?

The object is to get the tranny output shaft and pinion to point right at each other. The U-joints allow the suspension to move but you want them, for optimal power transfer and longest life, to be straight on each other the bulk of the time(ride height).

If you had an empty engine block bolted to an empty transmission bolted into your car you would want to beable to run a string right down the crank centerline, through the center of the transmission and right through the centerline of the pinion in the rear end at ride height for optimal power transfer.

Angles produce higher stresses because as everything spins up it trys to all line up in a straight line putting latteral stresses on things such as your transmission housing, rear end, and u-joints.