Join Date: Feb 2002
Location: Disposed of old tat. Fun bags for me now!
Car: Other Manufacturer
It could well be something else, bear with me for a moment here. . .
The BMW 5 series (E39), which, as we know is of a very similar, high grade front end construction to the 75 can suffer from odd wind noise issues.
1. Are there rubber mounts where the jack goes under the car like on the BMW?? I seem to remember that there are from my 75 and seem to remember them being the same rubbers in fact.
There is a spiked bit of rubber, which pushes into a hole in the body. If one comes out, the wind rustling past the hole, draws air down the double bulkhead void and makes a bizarre wind noise from the windscreen at speed.
2. Front wheel arch liners. If these are misplaced/cracked, particularly where they join the under body belly panel, if appropriate, air can whistle in and up into the bulkhead void, giving another weird noise.
Both noises sound like they are coming from the screen.
Thought I would let you know, as I can imagine this may have taken some time to find out for the BMW owners as you will look in the wrong place. . .