'92 Legacy SS EJ22t Auto. About 138k miles. Seems to shift through the lower gears OK, but never goes into 4th. I *think* I can feel the TC lock up in 3rd as the RPMS drop slightly sometimes, but not enough to indicate it's going into 4th gear. I recently replaced the filter and fluid... I've only had the car 2 months and had never driven it on the freeway before changing the fluid. It's not throwing any codes and a stall test was within normal range... about 3000 rpms. Any suggestions?

Sounds like the trans is starting to go.  Replacing the fluid can sometimes make things worse, unfortunately.

 

You can adjust the brake band external to the trans, it's responsible for 2nd and 4th gear.

I had an auto trans do this in a Buick, I knew it was going out and I used some Lucas stop leak/trans treatment, it made the trans work for about 3 months longer and I was heavy footed with it. It might be worth a shot if you cant find anything else that will fix it, jut my $0.02

Edited May 15, 201312 yr by mikaleda