91 olds eliTe, STarTing in drive car seems to be in high gear. Manually sHifT to low gear and it seems to be in second. CHEcK ENGINE codes are 26 and 36

Shift solenoids are inside the tranny, 1 for each gear. They will have a wire going to each on the exterior of the tranny, but the only way to test for certain is with a pressure guage as each actuates when the flulid gets to a specific pressure which triggeres the solenoid to move forward/backwards and this upshifts/downshifts the car. The only true way to diagnos is for some to physically drive the car to see if it is demonstrating the problems associated with the solution. This is truly not a guaranteed solution but merely a suggestion as I/anyone can't accurately diagnos tranny failure over the net. Start witih the simple things, hows your fluid level, is it smelling burned when was the last time it was flushed (by removing the pan) and filter changed. And also you never answered if you go down 3 clicks from park to D (don't look at the indicator) go by feel does it drop into R at 2 clicke, D at 3 clicks, 2 at 4 clicks and 1 at 5 clicks?? Shift solenoids are inside the tranny, 1 for each gear. They will have a wire going to each on the exterior of the tranny, but the only way to test for certain is with a pressure guage as each actuates when the flulid gets to a specific pressure which triggeres the solenoid to move forward/backwards and this upshifts/downshifts the car. The only true way to diagnos is for some to physically drive the car to see if it is demonstrating the problems associated with the solution. This is truly not a guaranteed solution but merely a suggestion as I/anyone can't accurately diagnos tranny failure over the net. Start witih the simple things, hows your fluid level, is it smelling burned when was the last time it was flushed (by removing the pan) and filter changed. And also you never answered if you go down 3 clicks from park to D (don't look at the indicator) go by feel does it drop into R at 2 clicke, D at 3 clicks, 2 at 4 clicks and 1 at 5 clicks??

Also could be your clutch packs as well if they are worn you will get slippage and hesitation in one or more gears, if they are worn your looking at a tranny rebuild. Its possible the 1st gear clutch paks are worn and thats why its has no power when off the line and you switch it to another gear with more friction pad on the discs... Also could be your clutch packs as well if they are worn you will get slippage and hesitation in one or more gears, if they are worn your looking at a tranny rebuild. Its possible the 1st gear clutch paks are worn and thats why its has no power when off the line and you switch it to another gear with more friction pad on the discs...