The brakes on my 86 GTV6 went soft like I'd lost either the rear or front brakes. The fluid was also down some and I thought I could see a wet spot at the left rear. I carefully drove it to the repair shop and left it for repairs. The next day the mechanic called and asked "what's supposed to be wrong with the brakes? They seem fine to me." Does anyone know of anything that would lead to intermittent loss of 1/2 of the brakes?