Heres a tip when fitting these, before you tighten everything up and drop the car down on its wheels check that you have a full suspension arc travel from full droop of your damper to full compression !You will almost certainly find that if the rose joint at the chassis end is anything but completely "plumb" that you will run out of travel and that the resultant "binding " of the top hats either side will cause the stresses that i reckon contribute to these problems at the TCA end ! I think Comp brake have addressed this issue but i still had to grind a 45 degree radius on the top hats to allow anything like full radius movement .