I have had to rebuild my transmission for the second time. I did not know but the 700r4 has a week spot. The input shaft housing has a tendency to crack. I have 5000 miles on my car and I lost 4th gear coming back from a trip with my wife. Turns out when the housing cracks it drops the pressure for 4th gear and it will slip. By the time I got home I had burnt up both clutches in 3rd and 4th. When you have the transmission rebuilt have a good look for hairline cracks on the input shaft housing. This is not something you can inspect without tearing apart the transmission. Buy the way you can pull a 700r4 out of the car from the bottom but it is real tight. Have fun and ride on my friends!