Doug, I just read through the installation process in the 1954 Shop Manual on pages
1-2,
1-3 and
1-4.
Nowhere in those instructions does it indicate to use soapy water or lubricant to install the rubber to the glass or body opening. I think the soap water is causing your difficulties. Dry everything off and install the rubber to the glass that way. I read in this related
Window Install Tech Tip suggesting: " So a previously mentioned light copper wire was wrapped around the north / south axis of the assembly in a few places." to help hold the rubber to the glass if it continues to slip or roll off. Those wires are easily removed once you get the windshield and gasket situated in the cab opening.
Just my $.02 worth on the subject. Others should be along to offer their own tips and suggestions.

EDIT: BD beat me to the post button - lol!
