Plain and Simply it needs repaired get it to a trusted repair shop.
Good Luck.
This problem could be the linkage in the transmission. The transmission could also be going out and would need replaced.
The transmission is the same.
make sure you not in LOW Range 4-wheel drive That could do it! ALSO THERE IS A VACUUM LINE GOING TO TRANSMISSION THAT SOMETIMES GETS WORKED OFF. CHECK THERE AND THAT WILL PROBABLE BE THE PROBLEM
The shift censor could be going bad. There may also be a problem with the transmission linkage which would cause this problem.
you could be running low on transmission fluid, or your torque converter could be going out
Depending on the speed you are going, yes it could really kill your transmission and your engine! But don't be afraid, your car is not suppose to allow your transmission to downshit if your going to fast for that gear.
linkage bind
There are a couple of reasons why you car is jerking when you are going below 60. It could be the result of a problem with your transmission, or your fuel pump could be going.
NO. A knocking noise in the engine is a problem in the engine.
Another problem might be the sun gear drive shell in your auto transmission. GM 4L60 transmissions are notorious for this problem causing a no reverse symptom. this means that you will need some serious work done on your vehicle
Drive it forward to a transmission shop.
Of course not. Without a working transmission you are going nowhere.