Have Transmission Questions? Ask a Mechanic for Answers ASAP
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the light blinking indicates a fault in the transmission control system. it will store a code. once we know the code, we can further help you. if you just had it overhauled, most likely this is going to be a warranty issue with the shop that performed the work.
it will be stored in the tcm module, not the pcm for engine controls. do you have a scan tool?? a code reader may not pick it up.
if not, then you can go to a parts store and they should be able to read it for you for free.
The TCM for the transmission is mounted on top of the main control valve body. The control module for the transmission has been designed to operate correctly in the environment in which the TCM is located.