Generally if it only shudders when braking then you likely have warped brake rotors but it could potentially be one of many other issues too.
The power steering pump provides the pressure for the steering and brakes. Check the p.s. fluid.
== == Power brakes and power steering have nothing to do with each other.
power brakes are more powerful
If a car shakes and loses power when idling it can be the spark plug. If a spark plug is fouling, it can cause power losses.
Reduced stopping power. Increased stopping distance. Noise when applying the brakes. A spongy feel to the brakes. The need to pump up the brakes in order to stop. Any or all of these can be an indicator. If in doubt, take the car to a pro brake shop. No sense playing around with your safety.
caliper froze, brake line collapse, or wheel bearing out.
The power steering pump also provides power for the power brakes.
The brakes are unevenly calibrated. The brake on one side is applying first, and with more power than the other side.
Engine stalling when applying brakes is usually indicative of a leaky brake booster. The brake booster uses and stores engine vacuum while driving to assist your braking effort (power brakes). When the booster's air diaphragm is leaking air, applying brakes causes a substantial vacuum leak in the intake manifold, causing the engine to stall.
i have a 1998 grand caravan se, and it was doing the same thing and found it to be the power booster.
Front brakes have significantly more stopping power than rear brakes.
It maens the computer is controling the amount of slip at the drive wheels either by applying the brakes or by chenging the power distribution to the wheels. This happens in slippery driving conditions.