Art, it only takes about 3 miles of stop/go/stop driving for the computer to learn a new "foot." IN the case of "learning" the car is now in hilly terrain, it takes two part throttle downshifts to figure out a new shift schedule.
(a) Camry auto trans is a 4sp unit + torque converter lockup.
(b) If you have ascended a hill at above 42 mph and start coasting down the other side, the transmission will sometimes downshift to 3rd to assist braking. Depends on how hard you applied the brake.
(c) You may well have a complaint at this speed that the dealer may be able to correct.
(d) The transmission will perform a downshift to 1st while the car is still rolling if you resume acceleration below 11 mph. This 11 mph threshold will be reduced to about 7 mph if the engine temperature is still cold.
(e) Normal. Neutral to Drive will produce a soft engagement of 1st gear with a "double bump" sensation.
Phillip: The condition is DRIVE to NEUTRAL, not the other way around. Same comment?
Thanks for your valuable info.
WN
Good better best, never let it rest, till your good is better and your better is best.
Then I wonder if there is a break in period for the AT. In my Avalon it took a while for it to shift smoothly. Don't know if it was as long as 1500 miles but it wasn't just 3 miles.
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Break-in is a subject quite separate from the transmission ECU adapting to a new driving environment. In the days preceding all this electronic intervention in transmission performance, one could safely say that if a transmission survived the first hour of use, it was stabile.
Pardon me, I erred. Drive to Neutral should be a simple disengagement further cushioned by the torque convertor. If for some reason a clutch pack is being momentarily pressurized, then electronics diagnosis followed by a thorough bench examination of the valve body is in order. This may be related to your 25 mph downshift roughness. There are "accumulators" that are supposed to soften clutch applications... one of these pistons may be stuck in it's bore. Sad thing about new components is that all sorts of wierd stuff can happen outside of the normal stuff.
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