Power Window Motor Repair

[Big_John]

Now you need to clean up and refresh your other motors, or you will have 1 that is faster than the others

I got the speed up on the others by adding relays a few years ago.

Power Window Relays, now with Power Vents

 

[Big_John]

And FWIW, for my power window hat trick, here's a thread I did on fixing power vent windows. Power Vent Motor- Anyone ever take one apart??

 

[commando1]

Definitely the smartest dog on the internet.

 

[chippers65300]

Excellent tutorial Big John. Will bookmark this as I intend to do the same on all four of my 65 300's windows. I prefer using original parts or nos parts. They will work for another 50 years!! The cheap China crap won't last if it even fits.
Both rear motors are out of order now. They barely work, just and 1/8 of an inch or so. Thanks John!!!!

 

[Ghostultramarine]

The cars after about 1974(?) or so seem to have the pucks in the drive. Earlier cars have the spring drive. When they made the change, I don't know.

I think the springs lessen the shock of hitting the up and down stops.

Dorman was making the drive gears, but I can't find them on their site anymore. You might be able to find some on eBay with a little patience.

Here's a link to repairing the drives. You could use nuts or find the "pucks" on eBay. Either way works. How to rebuild Chrysler Power Window motor clutch assembly

You have to install the motor and shaft before putting the drive gear in.

My 1968 has pucks in the drive. I think the springs may be far better ...

 

[Dr. Dodge]

Great thread. Thanks for the schooling.

 

[Dobalovr]

Thanks @Big_John your threads on power window motors have served me well over the years.

 

[jmustian]

I discussed removing the rear window motor in my '70 300 vert here: Removing Motor

The original idea was to just replace with a newer model I had sitting on the shelf, but that didn't work, so let's just fix the old one instead.

The problem was real obvious when I took the old motor apart. The commutator was covered in grease and crap and one of the brushes was stuck and not making good contact.

View attachment 526487

I've freed up the brush, but you can see the crud.

View attachment 526488

Because it's a worm drive, you can count on a thrust washer of some kind on both ends of the shaft. See the little round piece with the hole in it? That goes down in the end bushing.

View attachment 526489

This washer (thicker) goes on the other end. Note the nasty black grease. This was after I started scrapping it out.

View attachment 526490

I did all that with my vent window motor but no luck. Motor refuses to spin, just hums a little.

 

[Big_John]

I did all that with my vent window motor but no luck. Motor refuses to spin, just hums a little.

Sounds like it's stuck. Take a look at the Vent Motor Repair thread instead of this thread for more info.

 

[jmustian]

Sounds like it's stuck. Take a look at the Vent Motor Repair thread instead of this thread for more info.

I read all of that. The gears and all are great and turn by hand. Without the gears attached the motor still just hums. I pulled the armature, cleaned and lubed everything in the motor and it still just buzzes.