There is a whining/screeching noise when I shift the transmission into reverse and drive?

If it doesn't make the noise in neutral when revving the engine then it is not the belt, it sounds like you have a clogged transmission filter but to be sure can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response.

This guide might help us:

https://www.2carpros.com/articles/automatic-transmission-problems

Please go over this guide and get back to us.

i took it to my mechanic and he tightened a few air lines, and it stopped that noise but now it shakes when i put it into reverse and drive. He thinks it's the torque converter but i called a transmission place and he does not think it's that by what i was describing. He said it could be anywhere from a bad misfire or a bad motor mount.

It drives fine, changes gear fine, no weird noises.... However, when I come to a complete stop, the idle drops to about 400-500 RPMs and the car shakes. If I move it to Neutral or Park, it goes back to a normal idle. this is as well as I can describe what's going on, I'm not a mechanic by any means haha. If you have any ideas by this description, please let me know! Thanks!

i don't know how to edit post but on my last post i stated it changes gears fine but I'm still have the problem when i shift into reverse or drive it is shaking and has a rough idle, as well as when i come to a complete stop.

We need to start a new question for this problem because we only handle one problem pre thread. Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken