i find it hard to be leave has has Busted a gripper diff! Do you mean he has Busted the crown wheel or pinion! I have a gripper and its a good diff I have busted 1 c.w.p but I do have around 500lb ft of torque now I have a shot peened one but don't drive like a twat so I'm confident it will be fine! Mate also has a supra one and it dosnt lock the wheels that well