The winter weather is upon us in the NE, and my antilock brakes have been making an appearance. This is my first vehicle with anti-lock brakes. Rental cars I've had in the past seem to pulse qucikly when they activated, smooth. But with the Xterra, when they activate, there feels like a lot of crunching and grinding going on, almost feels like theres no brake pad in there. Is this something with ABS in trucks? Is this normal? Thanks.