I brought them a mangled trailer axle after a seal leaked the oil out of the hub and the bearing blew up the hub. The ABS sensor holder was squashed.They recommended, and I agreed, that the axle-air system (to keep tires inflated) be removed from both axles. That was the cause of the oil being blown out of the hub when it leaked air into the hub. They grease-packed all the bearings and refurbished the ABS system.I am writing this review and giving them 5 stars because the trailer ABS light started going on a few weeks later, and they took it all apart and did more remedial work on the mangled sensor bracket to better hold the sensor - and provided a new sensor - at no charge. I have driven the rig another few weeks without any further trouble.