on the TF trucks I've found variation in the metal frames for the side windows - either there was a change over the series years or there was some variation between plants in different areas, maybe even between Canada and the US .... I wouldn't be concerned with some variation, just have to do what's called for to run with what you have
Denny - good thing about that stuff is it's readily available at many chains - I always like to try out anything that appears to be citrus based, seems to work well
Bill
