I left my hot rod there to get the differential serviced and I had to tow my car home. I parked the car there with no issues. I picked the car up with a knock that turned out to be a spun rod bearing. The owner said that it knocked when they started it up after I parked it. It is hard to believe that I drove it 40 miles with no knock and all of a sudden it has a knock when they start it up to move it in the shop . It doesn't just spin a rod bearing just sitting there, and I would not have made it to the shop in that condition. The car was either taken for a joy ride or revved past its limits while in their care. Unfortunately I cannot rate the work done on the differential because they ruined my engine.