I just used Auto-Rx in the transmission of my 115,000 mile Volvo, and it does shift more smoothly after the flush & refill.
I'd suggest an Auto-Rx cleaning of your transmission followed by a complete (14 quart?) flush and refill with Toyota T-IV ATF. Alternately, you could use non-licensed Amsoil ATF or synthetic Dexron-III ATF plus Lubegard black-bottle HFM supplement, again a non-licensed concoction.
Ken
I'd suggest an Auto-Rx cleaning of your transmission followed by a complete (14 quart?) flush and refill with Toyota T-IV ATF. Alternately, you could use non-licensed Amsoil ATF or synthetic Dexron-III ATF plus Lubegard black-bottle HFM supplement, again a non-licensed concoction.
Ken