Sounds like low fluid level to me. Possibly a weak pump. Edit: That's going by my experience with much older auto trannys. Could be a lot of other things with a TCM-controlled transmission.
With the proper OBD/CAN software, you can monitor/log transmission parameters to get a better idea of what's going on.
Last edited by SouthArk370Z; 06-17-2015 at 12:37 PM.
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