4l60e shift trouble
My son in law'* 95 Suburban started not shifting up without lifting off gas. He said it was like that for about a week and now it will only pull in reverse and first. It is just like you shift to neutral on upshift. I unhooked the battery for reset, no help. No codes on scanner (OBD 1), TPS tests good, A & B shift solenoids check good, 1-2 accumulator looks good. I don't have a pressure gauge, but it pulls strong in reverse and first, no slipping. I have the 2-4 servo out. The Teflon seals look perfect but the red o-ring has an odd looking place on it and the servo piston bore is discolored at the bottom and shiney clean the rest of the way around.Am I looking at my problem here?