When I drive my car fast on 1992 Buick Century

When a drive my car over 40 mph and I brake it starts to shake and it then dies out but it always starts back up. It never happens when I am going slower than 40 mph

Asked by for the 1992 Buick Century
The car stalls?

I was going to say that the brakes causing a shaking condition could be brake rotors / drums that are out of round and need serviced. However, it won't cause a stalling engine. I'm wondering if you have unrelated issues.
i meant when i am going faster than 40 mph sorry