My window crank was flopping around like the shaft was broken, I am disassembling the car for paint anyway, removed window and lift mechanism and discovered the start of the problem, the lift assist spring had disengaged leaving the previous owner cranking so hard for long enough to wear a big Groove in the crankshaft. I first had to remove the shaft from regulator requiring drilling out the rivets to get shaft out. I filled in the groove with my mig welder than cleaned up the shaft on the lathe came out nice, next the bushing cap that holds the shaft in place had also worn in the process, I was able to swedge it back to tolerance with a piece of tobing and a hammer. Last step put it back together,didn't have proper rivets so I spot welded it. Good as new. Hope someone finds this helpful. Guy 63R3477