Vibration/hum on decel | Ford Explorer Forums - Serious Explorations

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Vibration/hum on decel

Joe Dirt

Explorer Addict
Joined
October 4, 2007
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Year, Model & Trim Level
07 Camry
Replaced the pinion bearing, that's good, the front driveshaft is good, the transfer case was replaced with a good one to avoid a possible VC failure.

When I run on the highway above 60mph, then let off the gas, I get a vibrating hum for about 10 mph of decel. No hum any other time, and only when slowing from like 75-65 when getting off the highway.

I am also getting some noise/grind when driving normally which I thought replacing the pinion bearing would fix. I filled the front axle with Lucas 80W-90 HD gear oil a week ago when we did the pinion bearing.

U-Joints? Rear driveshaft? Pinion bearing have the wrong preload? Something screwy with the transfercase? It seems like it's under my feet.

Thoughts?
 






Im also curious, because my 95' did the exact same thing, anywhere above 70, when i'd let off the throttle, it would do that for about 8 MPH.
 






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