thaywood
Dedicated LVC Member
Okay. Another (possibly stupid) question: I just replaced both the OSS and VSS on my 4R70W in the 'Bird. It didn't change anythng. It still won't go into 2nd without manually shifting it and the CEL is still on and OD OFF light is still blinking. Dammit! And it's still pulling the same code for output shaft speed sensor out of range. I don't get it. But it occurred to me that maybe it could be the 1-2 shift accumulator piston. Maybe? I don't think this transmission has ever been serviced. The pan looks like it's never been removed. So the piston upgrade was probably never done. I'm thinking that if I do that, it may fix, or at least help the problem. Because it only has a problem in 2nd gear. Once I manually shift into 2nd, and then into D, it shifts relatively fine after that. Except for the hard shifting into 2nd. I'm just grasping at straws here. I'm getting frustrated and I don't want to pay a stealership hundreds of dollars if I can figure it out myself. So far I've put $42 into the sensors to no avail. Any suggestions?