This morning I did a test drive of a new '08 RX350. We drove west of Denver up I-70 on the long 6% grade up into the mountains. I noticed that the transmission kept hunting for gears - shifting up, then down, and up again. I tried to keep at the 65 mph speed limit but the tranny kept shifting up and the speed would drop back down to about 55-60. So I would give it more throttle and it would downshift and just as I thought I would be cruising up the mountain at 65 it would shift again and my speed would drop. This was annoying and I had hoped for better performance. Is this typical of this transmission when driving in the mountains at altitude? Or am I just too accustomed to my diesel truck?
Bernie
Denver, CO
