Tech questions: E28 535i

I just picked up an '86 535i and had a couple of questions.

1. The odometer doesn't work. Does the speed sensor in the dif need to be replaced or is it in the cluster? (seems to be a common proble).

2. I was told that the this power steering pump is unique to the 535i, is it true or do other E28's interchange?

I think that's it for now. Car's in decent shape, in need of a good buffing and eventually a paint job. Interior is clean and the leather is good on all of the seats. Motor is very strong, has a "lob" in the idle, I wonder if it doesn't have a mild cam. LS rear end and front brakes have been upgraded to slotted rotors. Also has an M5 body kit.
All this for only 1k!

Thanks in advance, and Merry Christmas!

The odometer problem is most likely in the cluster. Go to http://www.odometergears.com/ for more info.
The power steering pump is 535 specific I believe. This is the one you need: http://www.realoem.com/bmw/showparts...41&hg=32&fg=15

The best place for all your e28 questions is http://www.mye28.com/

Thanks for the info Bob, I'll check it out.