The window on my '46 1/2 ton on the driver's side won't stay up. When it's rolled all the way up it slides down about 1/3 of the way on it's own once I let go of the crank. I took the door panel off and it looks like the spring on the regulator decreases as the window is raised, ending up with not enough tension to hold the window up. Anybody know what's going or not going on. Thanks, Jacques
