Forum Discussion

thehippie's avatar
thehippie
Explorer
Jun 30, 2018

about differential and transfer case fluid replacement

My 4Runner 4wd is already 122000 miles and differential and transfer case fluid not changed. It still drives like a dream.


I heard that if you change the fluid it will hurt your car more since those fluids never been changed since.


Is that true?
  • donn0128's avatar
    donn0128
    Explorer II
    Jun 30, 2018
    Nope! Old woves tale. Your likely long over due for service, and because of that there could be some abnormal wear of internal components. Clean lubricant is what is necessary to protect moving parts.

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