ATF in a hydraulic oil car. BTDT?

[quk@isham-research.demon.co.uk (Phil Payne)]

I know putting ATF in a hydraulic oil car "rots the seals".  But which
seals exactly, and how do the problems manifest themselves?

I had a car in on Saturday with miscellaneous brake problems.  A
left/right dive seems to have been fixed with a good bleed, but there's
something very odd about the hydraulic assist.  The pump is the later
square item fitted to the 20V Coupe and the MB, and it's leaking from
the forward (high pressure end) piston caps.  Is this where they leak,
or am I looking at a bad rebuild?  The car has only 85,000 on it - 1988.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone: 0385 302803   Fax: 0870 0883933