We already need HELP!! 2011 KK Base.M son has been driving back and forth from college, 80 miles each way, on weekends since Sept. Yesterday after a fair amount of stop and go traffic the Jeep started shaking. Made it home at low speed. Found the front left and right rear brakes were locked up. Spoke to several mechanics, one said maybe ABS pump. Any help is greatly appreciated. First time posting, hope I did it right. Thank you.