so I'm pretty sure the po filled up the transmission with gl5. i have ordered the mt-90 and will drain and refill but here is the thing. my transmission makes a squeal when i first drive in first and second gear. once it get warm its fine. do we thing new fluid might help? I'm pretty sure the transmission is on its way out but maybe i can get some more time out of it, we will see.

1990 5sp lwb 274,000 miles 80,000 on new motor