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I could use some assistance diagnosing an odd chirping sound coming from the N/S rear of SBH37222. It sounds a lot like a warped disc hitting the brake pad once per revolution, except:
It doesn't happen below about 10mph,
it doesn't happen with no throttle,
and it doesn't happen with heavy throttle, only light throttle once you're up and moving.
The period also doesn't seem to vary linearly with speed. It does change a bit as you speed up or down, but sometimes it gets faster and sometimes slower.
Is there anything in the height control valve or ram that can squeak or chirp? That might explain the non-linear frequency response.
Or do the hubs or ball & trunion joints ever chirp or squeak? (I'd think they'd be more likely to rumble if going south, but I don't have a huge wealth of experience here.)
Or maybe it is the brakes and the problem is just dependant on the rear suspension being in some narrow range of compression/movement which happens to be produced by light throttle?
(One other clue: applying the parking brake enough to get just a little bit of drag doesn't seem to change anything.)
Thoughts appreciated...
-- Jeff.
It doesn't happen below about 10mph,
it doesn't happen with no throttle,
and it doesn't happen with heavy throttle, only light throttle once you're up and moving.
The period also doesn't seem to vary linearly with speed. It does change a bit as you speed up or down, but sometimes it gets faster and sometimes slower.
Is there anything in the height control valve or ram that can squeak or chirp? That might explain the non-linear frequency response.
Or do the hubs or ball & trunion joints ever chirp or squeak? (I'd think they'd be more likely to rumble if going south, but I don't have a huge wealth of experience here.)
Or maybe it is the brakes and the problem is just dependant on the rear suspension being in some narrow range of compression/movement which happens to be produced by light throttle?
(One other clue: applying the parking brake enough to get just a little bit of drag doesn't seem to change anything.)
Thoughts appreciated...
-- Jeff.