I kind of had the the same thing happen to me. I would be driving, the brakes would go out, the trani would shift crazy and it wouldn't shut off. I had the vacuum lines replaced but still had the same problem. I ended up getting a new vacuum pump, problem solved! I've had no problems since.

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76 MG Midget
78 Datsun 280Z
86 Peugeot 505
01 Subaru Outback

“Owning a car is like owning a dog. Every now and then, it craps on the carpet — but it’s still your dog.” - Jeremy Clarkson