ABS in reverse (was 10/10ths)

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

In message <34FA0E90.7E49@ix.netcom.com> Wolff writes:

> The reason I asked the question in the first place, was that mine
> definately did not work once. I was backing down hill on ice very slowly
> and hit the brakes. All four wheels locked up and slid.

Yes, it _can_ do this if you're going backwards.  All pre-accelerometer ABS 
systems can also do it going forwards.  Ford Granadas (Merkur?) do it in both 
directions.

A colleague once complained that his Granada locked up on him.  All Granadas 
have ABS.  I took mine onto a patch of ice and tried.  About one in ten 
attempts resulted in a lockup with the car still moving.  It doesn't happen in 
post-1988 Audis because there's an accelerometer under the back seat - but as 
the arrow on the accelerometer's casing verifies, it's directionally sensitive. 

-- 
 Phil Payne
 UK Audi [ur-]quattro Owners Club