I switched over to Amsoil synthetic gear lube in the front and rear differntials and transfer case of my 2002 4Runner 4WD auto about 22K miles ago. What is the general consensus on the change interval (mileage and/or time) for the Amsoil synthetci gear oil? Thanks.

 

I believe 50k but not sure.

More importantly, do you have extended breathers and are you sure no water has gotten in there?

 

its on their website and it also must factory in your driving style, mileage, etc. just find the product you purchased and look towards the bottom of the product page.

 

Thanks to both replies. I will check their website.