Overdrive problems

I have a 95 buick century special sedan with the 3.1 v6 and the overdrive seeems to not wanna shift the other day to pass the tranny made a funny noise and now the overdrive os being really tempermental and the weird part is the tranny used to shift nice and hard what is going on (first cars fun huh?:rofl:)

If the fluid is full and clean, it should be scanned to check the tps and you may have to get it scanned for trans solenoid functions and slippage errors to check the pcm controls for o/d.