I've cleaned up and lubed the tracks on my quarter windows and they work pretty well now, except the driver side makes a loud pop sound on the way down. When I look inside while rolling it down, I can see the pivot point of the regulator jolt at the same time. I think it must be binding somewhere, but I can't find where.
One difference I noticed between the passenger and driver side is that lower portion of the rear vertical channel on the driver side is firmly bolted to the car. On the...
quarter window adjustment?
