I have a 1993 accord that won't up shift once the car has been running for 10-15 minutes. It will down shift with out a problem but then won't shift past second gear. But then at other times it will shift quickly back and forth between first and second for no apparent reason.

Is this an electrical problem or transmission problem?

 

When was the last time the fluid was changed, or level checked?

Are there any stored codes in the TCU or ECU? D4 light on, blinking.

If all of the above check out, guess what...I'm betting the tranny is dead. Sorry.

 

tranny filter is probably plugged up.