1996 tranny problem
 

hi, need help or suggestions please
I have a 96 jap import galant GT Sports hatch backmodel with the 2lt V6twin turbo with 6A12 model motor(VR4)
Having probs with auto transimission when going from 1st to 2nd sometimes looses gear and has no 2nd at all.
it will come back by either switching it back down to 1st manually then back up or taking foot off the gas pedal and back down again then it will click into 2nd.
some times it will also have problems when taking off it goes straight into 2nd and not 1st.
and can't seem to pull any error codes from the ecu either and transmission place is having problems trying to locate what is at fault.

Thanks