I was jumpseating the other day on a B737-800 NG and we landed at Flap30 auto brake 3. Like some of the comments above the auto brakes were kicked out relatively early and manual braking was definitely uneven and sporadic as you could feel the aircraft pulling to each side. The interesting part I found was it was a very quick taxi(3 minutes) to the bay and by the time we got there the left brake was shuddering which was shaking the whole aircraft with every application.
I’m interested to know and hopefully people here with more experience on the 737 can help with, how many brake applications have they found contributes to the shuddering as there couldn’t have been that much heat in them or was it the cold wear of the brakes with the little carbon particles breaking off causing the shuddering.