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- Denver, CO
In response to your other points - rear differential oil MUST be changed (as per Mazda's published schedule for 2016) at around 30k miles. The front transfer case should be changed if it was submerged under water. However, the verdict here (in this forum) is to still go ahead and do it (front transfer case along with rear diff oil) when changing rear diff oik as both are inter-linked.
Yeah that's what confused me as my 2014 manual states to only change it if:
*3 If the vehicle is operated primarily under any of the following conditions, replace the rear differential oil at
every 48,000 km (30,000 miles).
a) Towing a trailer or using a car-top carrier
b) Driving in dusty, sandy or wet conditions
c) Extended periods of idling or low speed operation
d) Repeated short trips of less than 16 km (10 miles)
So I guess I am 31k miles overdue.