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When I engage my hill descent it makes a grinding noise while progressing down hill it does not sound normal to me. Anyone experience this. New 18 JLU rubi:frown2:
 

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Descent activates the abs pump and brakes to control speed. Your noises are probably normal. Find a slippery or loose gravel and spike the brakes to activate anti-lock, is the noise the same?
 
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The noise is from the brakes rubbing on the brake disc's as they control your speed. Normal for hill decent with the automatic.

Ron
 
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