I changed tranny & rearend lube yesterday, installed D4 ATF in tranny, and 75W140 in rearend with 4 oz. Ford friction modifier- Both lubes were Red Line products. I also installed a set of Steeda urathane shifter mount bushings and a Saleen Short Throw Shifter block Kit on the stock shifter.. These last two items are really cool- I don't think an aftermarket shifter could be much better than my stock shifter with these two additions. All in all, a big improvment in the shifting dept.