so i have a honda 1990 accord ex and out of nowhere my transmisition is slipping some time it will go to 6k at 30 mph and other times it wont even roll it will just reve up i need help

 

Does your CEL, S or D4 lamps work? They should come on momentarily when turning the key to II(ON) before start.
If they do, check over by the passenger kick panel and look for a two wire blue connector.
Turn ignition to I(OFF) and jumper the connector with a wire.
Turn ignition to II(ON) and watch for any blinking from the CEL/D4/S lamps.
If no codes, verify the underhood ECM memory fuse is not blown.
Record codes and post back here for further diagnostics.