Help: Downhill Descent Virbation

[kantoot]

Need some help on this and am not sure if I have it posted in the right place.

So long story short I took my family to the mountains and back down. On the way down I noticed like a vibration and sound that would be typically be a unbalanced wheel or warped rotors or even a wheel hub.

I have never had any issues in the city and even long drives between LA and Vegas. Alignment, suspension and brakes are all good. Factory 20in rims with AT tires from cooper with about 15000miles.

Any suggestion? The downhill descent was about a good 15-20 miles.

 

[#1taho]

Bad carrier bearing in the diff would be my guess


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[BlkYukon]

Simple question - were you going faster on the way down than you normally would be? Like do you normally drive at 70 but you hit 80 on the way down the hill?

If so, tire balance is always the first thing to check.

 

[kantoot]

Simple question - were you going faster on the way down than you normally would be? Like do you normally drive at 70 but you hit 80 on the way down the hill?

If so, tire balance is always the first thing to check.

No was going down at 60-65 and noticed the noise between 45-55 when breaking. Once got down and back on the freeway I tested the same speeds and no noise at that speed and breaking.

 

[kantoot]

Bad carrier bearing in the diff would be my guess


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Is this something I can verify outside or is this something internal? Thanks.