Disappearing rear window glass?
HB Chris said:
They should disappear, just adjust the bottom stop inside the door.
I know the glass can be made to sit so that the top of the window is flush with the sill. I do not think the factory intended this. I can't say why, or that it is logical or more aesthetic. I remember cars in the showroom had that very quirk. FWIW, it may sound silly, but it was once explained to me that this discouraged protruding arms.
A similar quirk are the protruding door lock buttons. They can easily be modified to sit flush with the top of the door skin casing, but they did not come that way from Munchen. One explanation is as good as the next.
Re window speed, I tend to think swapping motors may be overrated. Take the existing motor and test it without the load of the window. You may find it works just fine. Alternatively, wearing suitable gloves, try to move the window up and down in its guides/channels. If you have to muscle it, cleaning and lubing those guides is indicated. Even loosening things up with light oil or solvent may do the trick. Otherwise, you might invest in a diesel powered window lift. :lol:
I do not know about 1/4 mile window lift speed, but unless you are set on joining the super stock modified class, consider also that original motors may have lost much their original lubrication as grease migrates and congeals - away from any gearing or moving motor parts. The remedy is to clean and relubricate. Given the years, I wouldn't be surprised to learn that this could be true of even the replacement 5 series motors.
hth