So I just got my brand new Dorman 747-411 power window gear kit for my 1988 5th ave. The installation went fine. I'm glad I tested the new kit out for about 6 cycles up and down before completely putting the door panel on. At the last cycle the window wouldn't go up all the way and it eventually slid down into the door. The 3 solid plastic plugs disintegrated inside the gear. I came up with what I think will be a long lasting fix for it, and it is working great. If anyone is interested let me know and I will post the repair I did.