Hello and thanks in advance for any and all help.
I have a 94 Honda Accord EX with 214000 miles on it. The car runs good, trans shifts smooth for about an hour or 30 to 40 miles of freeway driving. Then on the freeway the trans will downshift in to second gear and stay there, then the next day it starts all over again, runs fine until freeway for an hour. I have tried to test the TCM but get no blinking from the D4 light. The trans oil is a bit brown but no burnt smell at all. I changed the trans fluid with Honda ATF-Z1 trans fluid. I’m testing it now to see if that helps.
Any ideas what it could be and how to test for it?

 

you need a rebuild as an internal seal has failed on the unit and 2nd gear is the the default when the trans has suffered an internal hydraulic leak

 

YeuEmMaiMai
Thanks for the reply back. It is just so weird that it will drive back and forth to work all week, but if I take a drive that is a little farther it down shifts into second. And then the next day it will drive back and forth to work for the week.

 

You have a bad "A" solenoid sir

 

mavvrik,
Thanks for the reply. The lock-up control or the shift control solenoid? I tested the ohms on the both and they seemed to be with in specs (12-24). I pulled off the lock-up solenoid for a quick clean and found the A side a bit dirty. But not blocked.

 

I agree with the 1st response and 2nd but have you taken either soleid off to see if it is sticking in one position. I know that their are screens that can plug up. The next thing to look at is the adjustment of the dent cable make sure when the trottle closes so does the throttle valve