Okay, so this is going to be a long one so buckle in.

Background: About 8 months ago, my catalytic converter blew out when I was driving. The check engine light started flashing for about 20 minutes but went off after driving for a bit. It took a couple of days for my PCM to relearn the exhaust gas ratios but overall that was fine. After this happened though, shifting into third or fourth gear between 40-45 mph was nearly impossible. (I have an auto.) Every time the car tried to shift in...

2005 5R55S Auto Trans Major Issues