When should I change my differential and transfer oil on my 2008 5.7L 4WD sequoia?

I have a 2008 Sequoia that has about 97800miles on the odometer. I thought of changing the front and rear differential oil including the transfer case too. Toyota does not specify change interval for normal driving. Any idea/suggestion on when I should change this oil?

Skoda John2017-07-30T21:03:04Z

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I would do 5 years or 50000 miles.
If used off road then even daily in extreme conditions.

?2017-07-29T14:10:17Z

READ the owner's manual that came with the car. It has a section on recommended service that will tell you when and how often you should do this.

No manual? Then BUY one from Amazon.com or from Ebay.com, and THEN read it.

Miguel2017-07-29T14:04:38Z

Today if you have the time

Alexa2017-07-29T14:03:40Z

no