I kind of pushed my luck with the 65 dollar C-4 thats in my 55 on the trip to Daytona and back,I noticed it making a noise when first fired up after sitting over night the next day after I got back. I would had a much larger tow bill since my trip was about 950 miles each way but it made it back home. We had snow since I got back so I have not driven it to see if then trans still shifts.