There is a lot to search on regarding the windows, and this is my third time to work on mine (I've had my car over 20 years, so....). The first time I took the gearbox apart, it was like green glue. I cleaned it all up and put white lithium grease in and that helped a lot. Second time apart it was like brown/white glue and I put new white lithium grease in again. Last night I found the same thing again. For those who have been in that gearbox before, think of that little worm gear that drives the big gear....there are two little copper bushing things (one on each end of the shaft coming from the motor with the worm gear). The old grease was so sticky that I could not move that shaft by hand at all. I had to really work those little bushings before I could pull them off and clean the worm gear. No wonder the motor couldn't drive the gears. So....my only question here is what type of grease do you recommend putting in these gearboxes, and in what quantity?