[nhra78]

Vehicle is a 2002 Chevrolet Monte Carlo with 158K miles on the 3.4 liter. The car was given to me with known head gasket leak and possible transmission issues. I repaired the head gasket leak, now for the tranny. I take off in D and it has good acceleration with no slipping hesitation or surging it feels normal. It will never shift out of first gear even if I manually shift through the gears it stays in first. I went up to 4000-4500 rpm and no shift at that point if you let off the throttle and get back on it it acts like it is in neutral. Fluid is full not the best or worst I have seen as far as cleanliness but full.

I borrowed a Modis Edge from a buddy and I can see the solenoids 1 and 2 changing state on/off in the proper order to shift to 2nd and third but it never does.

There are no engine or transmission related codes.

I have spent hours searching and reading the net whenever I find a similar post it ends with no resolution.

My next plan of action is to pull the pan and see what I see.

Thanks.