Because the wife needs to carry a heavy load in the trunk at all times dur to her work, I got clever one day at the boneyard and pulled a pair of 245 rear springs for my '86 240 sedan.

treating the set up like these are overload springs, just without the cost.

All seemed O.K., but the right spring persists with a loud "sproing" noise whenever tackling a bump, like a speed bump. No problems in usual driving, if nothing of that magniture is hurddled.

The top of the coil looks properely seated in the notch of the upper spring cup. and I repositined the "D" shaped retainer at inside the bottom end of the coil, but to no avail.

Any ideas?

I beleive we can rule out the recently installed Starla exhaust system hitting the axle. It just isn't an exhaust kint of noise, but a "sproing"