Car bucks hard going into and out of first gear and reverse (not as bad in reverse) and slips into neutral rather than shift. Once (if) I get to 2nd gear, car shifts perfectly with NO issues. As a temporary solution, I pulled the O2 sensor fuse, which also controls the trans. This puts the car in limp mode....stuck in 2nd gear....and I can get along doing that. Notes: I had a TCC solenoid light, so I changed all soleniods....no luck. Also put in brand new VSS, as this appeared to be the most likely culprit...no luck. Filter and fluid are new. Any thoughts on what issue could be unique to fist gear? Thanks.