Thanks for your help. Guess I still need a picture. I've got the unit out on the bench. Shouldn't be this difficult. I looked at several springs offered on ebay and most were the same for the 36. This one was even shown with NOS box, (which didn't arrive with the spring) but like you say, it may not be correct. Ebay may have got me again! Don't want to pull the other passenger side out because it has the outside lock mechanism and, of course, it's frozen in place. But may have to. Thanks again!