Got a new transmission, shipped dry new. Put in a 3000 stahl revmax converter. Ran fine for a few months, now it's holding first too long. Checked the tps. Voltage all checked out. Have the 5 volts, solid ground, no rapid jumping in voltage when opening throttle. Any ideas? 1-2 solenoid? Vss, accumulator spring? Any help would be appreciated

 

Check your trans fluid and make sure its ok

 

I'm gonna drop the pan, replace the fluid and filter and change the solenoids. They're pretty cheap. I also read the 1-2 one has a spring in it and hit it with some wd/40. I'll probably check out the accumulator while I'm in there. Just weird how it ran perfect for months now just started doing this. I know o/d is working because I'm at 3000rpm at 90 and that's right on with 3:23. Thanks for the advice. I hope it's that simple. The last one I lost drive and overdrive, I just bought a new tranny. It had like 120k on it. I figured new motor might as well buy a new tranny