a month ago i replaced both hubs in my 05 3500 dully 4x4 diesel the ABS light and the brake light in the dashboard stay on constantly but were flickering on off before i replaced hubs , just recently i was driving and the brake pedle was rock hard and i had to put my foot in to the floor to get the thing to move seems the 2 blocks i drove home was enough to start fires under all 4 wheels . Additionally the speedometer jumps.while driving I read that this may be a result the ABS module, Anyone with the same problem that can help?