My son has now gone through 2 transmissions over a 114,000.00 of use. He is not an off-road user nor drives a lot of miles. Jus back and forth from high school. This last transmission only lasted 14k miles. My transmission guy is sympathetic, but not completely as far as fixing for a reduced price. We do not know what is going on here. My son has large tires and a small lift kit. This was what the original owner had. Should there have been a a gear change with larger tires ? Could this in anyway be a result of early transmission failure if the gear change did not take place with larger tires ? Any help or advice would be appreciated.