My driver's side power window gets stuck once its about half way down. I need to use my hand along with the power window switch to get it moving. In the upper half of the travel, it works fine.

Can someone advise what the possible cause could be? Could this be as simple as taking the door panel off and being generous with WD40?

 

what year/model? most likely its either the window regulator or the nylon wheels that are not tracking properly. I'd take the door card off and give it a look around to see if anything is worn or damaged. Interestingly, years ago my mom's 240 DL had something like this happen and it turned out the regulator had just loosened up its mounting bolts.

 

Its a '91 244. Should have mentioned that in my original post....
I thought about it being the regulator, but this problem has persisted for the last 4 years. I got some time this year and want to fix her up. So makes it seem like the nylon wheels theory being more possible.

Is there a write up on how to replace the regulator? I wasn't able to find a Youtube video or write up here. I know how to take the panel off and the insulation, but not much after that

 

Not hard to do... Open it up, see how it works, get to it--that's how you learn.