Why does the d4 dash light blink on 1996 Honda Civic

D4dash light blinks, rough going into reverse and rough take off, seems hard finding gears

Asked by for the 1996 Honda Civic
'D4' blinking indicates that there are trouble codes stored in the trans control module. Is check engine light on also? If so have that scanned. Post PGM-FI (engine) and A/T codes for more help. Avoid driving car as much as possible.