Well after 7 years of flawless performance from my ARB lockers front and rear, my rear ARB failed and got stuck in the locked position after last years Zu-zoo. After sitting for the winter I pulled the diff apart and found that the plastic piston that locks and unlocks the diff was broken. So, I called ARB and they told me to send it to them. That was a week ago. I talked to them today, they were waiting for parts but repaired it today, changed all the seals, cleaned it, packaged it with a new bulkhead kit and airline and shipped it....all at no charge!!!! This unit was 7 years old and tey completely stood by their product! Amazing customer service. Props to Matt and Chris in ARB tech. If you are thinking of buying anything ARB, do it with confidence. Fernando