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Folks on this board should really consider what they say before they say it... people are asking for advice and they are at your mercy. This isn't a measuring contest and its not an arena for bullshitting. ITS A PLACE TO HELP OTHERS OUT. Don't post for the sake of posting!
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hey, i am just trying to help someone avoid problems to the best of my knowledge, so give the hostilities a break for a minute.
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Even on an automatic, it does not "learn" shift points and niether did your Caravan. I cannot imagine what would make you think that. At most the computer is monitoring tail shaft speed and deciding when to lock up the converter, (not on the corolla).
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No. My caravan DID learn shift patterns, shift points, etc. as you were driving if you dont have a rack to stick it up on, and drive it with the tires in the air. And i DONT know about the corolla tranny, and it didn't sound like he did either. Hence the reason i was reccommending that he wont want to change it.
"The A604 is the first transmission to control the release of one gear and the apply of another without the use of bands or sprags. It programs its shifting operation by sampling the vehicle's operation pattern while it is being driven" -
http://www.txchange.com/a604.htm
Having had to do this a number of times, i can confirm it. If the memory on the TCM gets wiped (such as disconnecting the battery while working on the car), you need to train the transmission. It will have rough shifts, slippage during shifting, and shift at wierd rpm ranges for the first several miles until it starts to learn. If you dont follow the learn procedure right, and are too heavy on the throttle, shift points tend to be higher until it has a chance to learn them properly. If you dont do this after swaping in a good transmission for a bad one, it can cause serious internal problems. following the old shift behavior, it can try and apply two gears at once, or have a long period of neutral between gears or other dangerous behavior. If you still dont believe that transmissions can learn this information, i can post teh procedure for you if you want.