i have now broke 2 gripper diffs,running about 600 bhp.both in a 7 inch case.the weak point is supposed to be the cwp,so that should make the gripper part indestructable.but the 2 ive broke ,the cwp was ok.
i now have a 7.5 rear diff,because the cwp is stronger.but as it seems the gripper part is not under warrenty when broken before the cwp,unsure what to do now.cant afford to spend 3 k on a 9 inch diff.