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Differentail fluid replacement frequency

What is the recommended frequency of replacing the differential fluid in a 4wd automatic 1999 chevy blazer

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Al ot of it depends on the type of driving you do. If you are driving primarily on paved roads, in town or highway driving, you can go 50K or more before replacing. If the differential is a limited slip, I would recommend no longer than 50K because of the clutch pack conditioners breaking down in the oil.

If you are an off road user, I would change the oil anytime the differential was under water or in mud and if you are driving primarily on dust dirt roads dirt roads, change it every 25 to 30K.

If you tow a trailer, keep the changes for both limited slip and conventional differentials to the 30K range.

You will keep the components happy and failure free. Just remember that water and dirt are the enemy.
Good luck, hope this answers your question and is only my opinion.
If you want specific manufacturers recommendations, you can find them in your owners manual.
Regards,

Posted on Apr 21, 2009

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The fluid is only replaced if it gets contaminated from water intrusion or if there is a problem that requires tear down of the differential.

Posted on Apr 21, 2009

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