Rumbling noises when coming to a stop

[NormalSpeed]

I’ve noticed that recently when you come to a stop, there is a consistent rumbling noise. Sounds like it’s coming from the back. It stays consistently, but you can really hear it when you come to a stop. When you go to Park and then back to drive the noise goes away, but then reappears when you come to a stop. Any ideas?

 

[SlegMD]

Air compressor

 

[NormalSpeed]

Perhaps. I’ve had this thing for 2 years and never heard this before. Now it’s every drive.

 

[CyberGus]

there is a consistent rumbling noise

Maybe it's hungry?

 

[TesLorean]

I've noticed the same new noise. I would say the air compressor is an unlikely candidate. However siting waiting for a light yesterday the truck suddenly moved. I thought someone had bumped me - but no one was close enough. Only happened once. There was no reason for the suspension to adjust and yet it did? Could the air compressor startup in some kind of re-leveling when braking?

 

[NormalSpeed]

It’s a low volume grumble and my thought's on this is it’s a motor as if one is not completely disengaged at a stop. As if there is a slight positive torque at a wheel.

 

[Kenneth K.]

if the symptom escalate, have it look at and please keep us all posted.

 

[Art138]

I leave height in one setting (low) and don’t play around with it too much. Have had truck 1 plus years with no issues. I have made stoplight abrupt stops without this anomaly. Wondering if it has to do with compressor adjusting at medium/high when braking due to incongruent leveling.