Thank you, I don't believe the spring is broken on this one- I had it diss connected from the window and it definitely has tension on the arm. but very worn I know. if I end up needing to replace the unit- I'm thinking I'd have to remove the front window channel along with the wing window to get the mechanism out. is that correct? also I have used several parts from LMC and while most have been serviceable I can't say that some weer near OEM quality.is there a better source for something like the window regulator mechanism?