I have 103,000 on my one ton and am experiencing some slippage with the TC while pulling my fifth wheel. I think it is about time to reach in the old wallet and get a new trans and TC. I have read about ATS, DTT, & Dunrite. Do any of you have any personal experience with any of the three and what would you recommend as the best of the the three. I do not know if the trans is bad, but I felt with mileage it would be best to replace the old automatic. Thanks for your suggestions.