Transmission woes...

[5point8LiterImportEater]

Hey guys since this startup thingy started like two weeks ago, *see my other post wierd startup probs* all of a sudden my tranny has started shifting hard. and it kinda shudders going into overdrive. Is this the begining of the end for this thing? it pulled 2 codes when I got it scanned 128, an O2 sensor thing and 625. the 128 was an on demand thing and the 625 was stored. it had to do with the transmission too. something about there being a severed wire or something of the like. Any help would be seriously appreciated.
Chris

 

[Litng1]

Mine did the same thing studdered going into overdrive.It was my stock converter I put in a stall and now all is good.The rest of my trans was fine.Good luck.
Marcus Harrison