I had a w2 360 with 727 and 8" turbo action converter. Switched to 904 with 8" turbo action converter. Picked up almost a 1/10th in the 1/8 and close to 15/100's in the 1/4. All we did was good clutches and band with the turbo action transbrake valve body. 600-700 passes between rebuild jobs. It never failed on us we just freshened it up every 18-24 months.