Years ago I had a 86 GT. It was stock with 3:55's and it killed 2 T-5's. I bucked up and got the WC T-5. 2.9? first gear ratio and it lasted about 1 year. T-5's can last if you are nice to them. I just don't drive nice. My AOD has a shift kit and a TCT 2,500 stall. It is on life support now and soon it will receive it's last rights. The AOD is behind a mild 302.