pulsing sound coming from under the GX (any help to diagnose)? (1 Viewer)

[BobinBend]

I noticed a sound today as I slowed down exiting a freeway (the concrete wall reflected it so I could hear it). It was a pulsating sound (ch-ch-ch-ch-ch) that was tied to speed rather than engine RPMs, so as I slowed down or sped up it changed gradually with the speed. I am thinking it was something to do with driveshaft or possibly a bearing, but would love to her some more educated opinions
GX has 150K miles on it so I expect something in the driveline. I want to take it to a shop, but if it is driveline, I will look for a driveline specific shop.
any thoughts or suggestions on some possible culprits? If it is a driveshaft...is it something I can lie with until I can get to a shop next Saturday?

thanks guys

Bob

 

[470SNC]

how many miles on your GX? it may be a wheel bearing going bad

 

[BobinBend]

150k miles. It seems to be more towards rear of the vehicle

 

[470SNC]

Could be simple as rear brake pad wear indicators or as worse as rear wheel bearing?

 

[BobinBend]

Just got done at local les Schwab and it was a heat shield that had fallen down and was rubbing on the axle or something. Can't believe I didn't see it when I looked but I guess I was looking at obvious things like u joints and brakes. Oh well... Final cost was $0 but I will need to replace the heat shield at some point. May not need it.

 

[470SNC]

nice dodged a bullet there, nice catch too