Could be the window is seized or the motor no longer has enough power to operate with the window.

 

Just put one of these in my pickup about a month ago - need to check if it fits your truck

 

The OP needs to locate the actual problem rather than blindly swapping parts.

Hunter Kesler: You say when the motor is disconnected the window travels the path of the regulator. Is the motor functioning when activated after being disconnected from the regulator? If it is, then the issue is in the motor gear setup. Note the three plugs in this eBay image. Those disintegrate over time, but I don't know if the Dodge motors have them.

Also, is the problem when the window is operated from the driver's door, passenger's door, or both?

 

He didn't say that.

He already answered that question.

I was only trying to help by suggesting a part.
It's up to him as to what to do, but from what he described something is wrong with the regulator assembly.

Yes, he can throw 20 dollars at a part plus his labor and maybe that will fix it, maybe it won't,
or he can switch out the regulator assembly for 50 dollars and have it all brand new with a warranty.
Ultimately it's his call.

 

Here is the window motor gear assembly from my 96 Ram 1500


and here is just the driver and drive gear


No insert plugs/bushings as suggested by Gary-L

 

If the motor will lower the window, but won't raise it, its likely the motor itself is bad.

 

His post was as vague as could be, so I was trying to clarify.
He doesn't state how there is an issue with the window -- is it when operating from the driver's side door or passenger's side door? He disconnected the motor from the regulator "and it works fine". How? Up; down; both; which door?

It should be diagnosed before money spent on the repair. All too often, people visit this (and many other) forums with a laundry list of items replaced that didn't fix a problem which, it turns out, was not properly diagnosed.