Dealer says my Infinity M35X should have the rear differential purged? on 2008 Infiniti M35

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I have never heard of this before in 52 years of owning automobiles including Cadillacs, etc?
The car has 48,000 miles.
(1) Answer
(1) Comments
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According to the Alldata information there is not a manufacture recommended interval for the rear differential. Most likely the vehicle came factory filled with synthetic gear lube and is considered lifetime. we recommend gear lube drain/replenish on time and mileage 60k would be a interval that I would be thinking about changing gear lubes.
Dan @ Waterloo Motors Inc.
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