I took our Mountaineer to Pro after it mysteriously stopped after reversing for a few feet.(It took a while for my husband to get it out of the garage!). The Pro mechanics were unable to discover the problem. They took it on several test drives, parked it overnight and tried again. The gentlemen advised me to just bring it back if the problem returned. They did not charge me for their efforts. I trust these guys and will definitely use their services in the future.