1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

Yet another diff issue

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Old

Dec 30, 2010 | 12:07 AM

#1

Mc366

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Yet another diff issue

I have a low pitched diff and or bearing whine mainly around 45 mph and up.It sounds like a bearing but seems to almost go away completely when driving downhill or when there is light load on the truck.I changed the diff fluid and it looked pretty clean with no metal shavings also the gears
Looked nice no gouges or unusal wear.are the rear wheel bearings easy to change?this is a 1997 expy 5.4 4x4 with 3.73 gears

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Old

Dec 30, 2010 | 06:09 AM

#2

alwaysfords41

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Is it an LSD? Did you use the modifier if it is? How many miles on the truck?

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Old

Dec 30, 2010 | 09:43 AM

#3

Mc366

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The truck is 1997 with 163k miles.it
Is a limited slip I used 7 ounces of the trans x friction modifier and mobil 1 75-140 synth lube.

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Old

Dec 30, 2010 | 10:10 AM

#4

alwaysfords41

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Sounds like you've covered the fluids properly. I'd suspect the bearings. I've never done them myslef so I'm not much help.

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Old

Dec 30, 2010 | 10:43 PM

#5

Mc366

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Thanks for your help.anybody out there done the rear wheel bearings on a expy or f150

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