Transmission service

It was sort of recomended for harsher shifting. Don't get me wrong I was looking to reduce the stall down a little not improve shiftnig but as stated its thinner that won't happen. All in all I will not jeopardize the box. I have been using Vavoline dexron III since day one. Box shifts perfectly. It was just a question whether it will lower the stall point.
Regards
Billy D...