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Discussion Starter · #1 ·
I recently had a TCM installed in my 2016 Sienna. The old one was broken and cracked, so I received a new one as part of the repair.

I'm not sure what steps are necessary to reprogram it, though. I've heard that techstream is the best way to do it. If anyone knows what the steps would be to reprogram this TCM via handel or other means please let me know!

The transmission still doesn't shift right. It seems to be very delayed when shifting into reverse and first gear, and it's also very hesitant when shifting into third gear.
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