J-brake or exhaust brake

[aliza46]

YESTERDAY AS I WERE COMING TO A STOP ONE COULD HERE A SOUND LIKE RUBING, (THIS ONLY HAPPEN WHEN THE SYSTEM IS DISINGAGEING). HAVE ANYONE EXPERANCE THIS PROBLEM, IF SO WHAT TO LOOK FOR, OR IS THI S A PROBLEM. I TALK WITH CUMMINE THEY SAID THAT IT WERE NORMAL.THE COACH IS 2006 42FT T/S WITH 6000 MILE AND I AM THE FIRST OWNER.

[skipwil]

Does this happen when the brakes are applied or when you get off the accelerator with no pressure on the brake pedal?
Safe journeys...

[mattandcarol]

If you suspect that the noise is the J-Brake then turn it off and see if the noise goes away. Your coach will have a J-Brake and not an exhaust brake.

[aliza46]

This happens when you get off the accelerator with no pressure on the brake pedal. By the way when the system is turned off the noise goes away, looks like I have answer the problem, or could it be normal, the reason I said that. I called cummins they said it was normal ?..............