I am in need of assistance again. = On my 1984 Vanagon, I went to replace the bushings (VW officially refers to them as = guides) on the bases of the middle sliding side windows. Upon checking = with the dealer, and discovering that the originals were discontinued, I checked = into whether the later model ones were still available. They were, and = I was told that the only difference between them was that the later ones were = black in color. I ordered them, and received them promptly. However, = when I attempted to install them, I hit a bit of a dead-end. They = obviously slide into the existing slots and grooves in the window frame, but they have = sort of a retaining tab about 3/4 of the way down them. I could slide them = on to that extent, but no further. After monkeying around with it for a = few minutes, and trying several different tools to get them to slide in the = rest of the way, I stopped, because the plastic that they are made of is rather = soft, and I didn't want to damage the parts.

So, my question is this: does = anyone have any suggestions as to how to get these guides slid into place without = damaging them, the window frame, or the glass. I'm sure there must be some small = trick to it that I'm simply overlooking. Thanks in advance for the help!