Why change fluid in front/rear differentials?

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Hp - 26 Jan 2006 21:50 GMT

Why is it important to change the oil?,fluid?, or whatever is in the front
and rear differentials?. I don't remember ever having to do it with any car
I owned. I only remember watching the mechanic check the level on the cars
rear end. I have 17,000 on my 04 Ram 1500 hemi quad. If that helps. Thanks
Hp

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Coasty - 26 Jan 2006 23:30 GMT

Many people do not change their differential fluids, every O&M does require
changing it. I change mine once a year weather I need it or not. It also
provides a snapshot of you gear wear. I have never had a failure and I do
alot of off roading. It is cheep to do, easy to do and it is a good thing
to do so why not do?
Coasty

> Why is it important to change the oil?,fluid?, or whatever is in the front
> and rear differentials?. I don't remember ever having to do it with any
> car I owned. I only remember watching the mechanic check the level on the
> cars rear end. I have 17,000 on my 04 Ram 1500 hemi quad. If that helps.
> Thanks Hp

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Tom Lawrence - 26 Jan 2006 23:48 GMT

Because gear oil breaks down over time just like engine oil. While not
subjected to the dirt and contaminants of an engine, it's still placed under
extreme pressures, and will accumulate metal shavings from gear and bearing
wear, and clutch material from limited slips.

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