deceleration noise.

[Brock]

2 things here. I have a prostar with a autoshift mine would always sound like the jake was on setting 1 even when Jakes were off. a hasn't sounded like that since my mandate disappeared but of course now my cams are toast and I don't have number 1 jake setting. I think I had too much back pressure from my dpf being plugged, I was driving around with my differential pressures at 5.0 to 6.0 during regens.

second thing. if you feel the grinding in your shifter (unless it's a auto) then it's possibly a driveline vibration due to bad driveline angles.

my 06 Volvo would do as you described and I knew it was driveline but volvo originally thought it was a engine noise and had my top end opened up till I came unglued on them. Turned out to be worn slipper pads causing bad angles.