Question about 2003 Ford Expedition

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Metal shavings in the oil of the differential whats going on ...

[t also makes a noise while driving straight not during a turn ,left or right it is a low grinding noise it does not last for a long time. only when it is hot ,once the car warms up the noise starts,but some times it comes back even when the car is cool

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The metal shaving in the oil in your diff is a bad sign, you should not have that problem if your car is new and under warranee, if the proble is within your warrantee period, take it to service.

The metal shaving in the oil indicateds your pinion (input gear) to your ring gear (driven gear), the shims may be too tight or the bearing might run out of true, therefore the intermeshing of both gear teeth is too close causing high pressure point on the tooth and wear, the metal shaving is either your gears or could be your bearing that is no longer within limited, this is a serious and sould be fix immediately.

The oil in the diff act as a seal, cool, lubricate and wash of the gears and bearing. It should not be like that if your car is less than 150,000km.

It makes noise when it is hot because the heat expands the metal parts causing them even close together, as a result too tight = rapid wearing. Stop driving and get it service or else you are looking for a new diff.

Cheers and good luck

Posted on Jun 25, 2009


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