I have a 1999 Audi A6 with a major water leak coming from the rear of the engine. When I get underneath the car it is leaking right at the transmission cable. I originally thought that there was an auxiliary water pump on the 2.8 but I was hold that there was only one on the 2.7 Turbo. Not sure where it's leaking from without taking a lot of the upper part of the engine apart. Does anybody have an idea? I also read that there is a cross hose between the two heads that have O-rings that go bad. What do I have to do to fix this problem?