I'm helping a buddy who has a 2010 Dodge Avenger Automatic. A couple of days ago the vehicle stalled and refused to shift gears. It was stuck for a long while not wanting to do anything then it shifted to reverse where it was fine. Later that day I found there to be minimal transmission fluid so he filled it up. The transmission was loud but did quiet down considerably after that; who would have known right!?

So now the vehicle shifts to reverse fine but in neutral or drive it sounds like someone is spinning. He replaced the speed sensor that screws into the trans but that didn't fix the problem. Where could we look now?

I hate misspellings and I see one in the title. I guess I'm stuck.

 

If the transmission is full...... doubtful there is anything you could check.
"Hearing" the transmission is not usually a good sign.
Either the transmission or the torque convertor may have been damaged from running low on fluid.

 

Lets rule out trans fluid at the moment; what all can we check?

 

You can start with getting it checked for codes. The transmission codes don't always illuminate the check engine light. Not sure about your make/model.

Beyond that, I second PJ's comment; noises are generally a sign of major issue and you may need professional diagnosis. Are there any good independent tranny shops in your area? [I'm not big on the big franchised chain tranny places, some of them tend to sell "rebuild" as a fix for everything].

 

What about the torque convertor being bad? That sounds like where the issue is, it's a spinning sound.

 

Possible, but that's a diagnostic job for an educated ear.