05 F-150 4x4 LOUD grinding noise at low speed

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02-12-2019, 01:10 PM

#11

techrep

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You are losing vacuum to the wheel ends.. you can either troubleshoot with a vacuum pump or toss parts at it.. if you want to toss parts at it.. I would start with a new IWE solenoid.

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02-13-2019, 09:40 PM

#12

powerstrokeaaron

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Also there is an updated vacuum solenoid for the 4x4. I guess they were having issues with water getting in the vacuum lines and running down and ruining the IWE’s. The fix was to install new vacuum solenoid with a cover over it to protect it from water and replace both IWE’s. Not too expensive if you can do the work yourself.

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02-13-2019, 09:51 PM

#13

drair

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Quote:

Originally Posted by powerstrokeaaron

Definitely sounds lie the vacuum solenoid to me. $20 at the dealer. Anyone can replace it...it just sits right under the back of the hood, above the firewall, on the passenger side.I didn't have to replace the IWEs. But I had already paid some idiots to replace a supposedly defective wheel bearing to the tune of $500.