Anyone have a fix for the driver side window rolling up slower than the passenger side. Sounds like the motor is having a harder time moving it. I can hear the motor straining. Anyone successfully lubricate the regulator and fix this? I'd like not to have to replace the motor.

 

I have the same issue. I think the only solution is to open up the door and clean/lubricate everthing. I'll probably do it next winter while the car is stored, but I haven't seen a good guide for it yet...

 

The window regulator needs to be cleaned and lubed. Over times and maybe triple the used vs passenger window it has collected mre dusts and grimes to slow the speeed. Maybe one day the motor may burnt out and quit. I did the cleaning on my old LS430 and even before that, my old 86' and 96' Porsches. After the work done, they all improved.

 

Crap, I have had that door opened up four times now and never thought about lubricating the window regulator...my drivers side is slower.

 

When I take it apart to install a new sound system I'll lubricate it then