Hi all, I have a '75 with an auto transmission, recently it refuses to force a downshift in gears, for example, if you are going uphill you would often put your foot down which would force the transmission to change back from (say) 3rd to 2nd. It doesn't want to do this now, it will still change gears as normal but I can't force a change like this. I've heard conflicting stories over what part of the assembly enables the forced shift, either a controller somewhere on the transmission, or a button under the accelerator pedal. The pedal button makes sense however the button there doesn't seem to contact on anything, so I can't see how it would function. As stated the car used to force shift fine, so its just decided now to play up. If anyone has good experience in this area and has some advice I would be very appreciative, I don't like holding up traffic hugely on the highway and planning trips around the hills isn't an option! Thanks all.