Bad Rear CV Axle Sounding Like A Bad Bearing? | Ford Explorer Forums

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Bad Rear CV Axle Sounding Like A Bad Bearing?

Domd

New Member
Joined
September 1, 2019
Messages
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City, State
Lafayette, Louisiana
Year, Model & Trim Level
2008 XLT
2008 Sport Trac XLT 2WD

Have replaced both front bearings within the last year. About 2 weeks after replacing the front passenger bearing I started getting “the hum” again. I assumed I maybe had a dud so I replaced the newly installed bearing but the hum was still there. It has all of the classic symptoms of a failing bearing. Low moan that increases in volume when you turn and the vehicle rolls to the side with the issue. Every once in a while there’s a short metal on metal grinding sound during a high speed curve that goes away as soon as the vehicle straightens out. None of the bearings had any play in them, ie....I could never shake the tires from side to side or from the top to bottom.

I figured it must be the rear bearing, so I made the necessary purchases. Removed the old rear bearing and pressed in the new bearing and hub. The sound is still there....maybe a little worse. While removing the old parts I had to “aggressively” hammer the cv axle to get the splines to release.

So my question is, could this sound be coming from the cv shaft or is it more likely that I damaged the new bearing when pressing it in? Can a bad cv joint moan like a bearing when the vehicle rolls to the side and the angles inside the joint change? Is it possible that hammering the cv axle(I know you shouldn’t) caused the hum to get a little worse?
 






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