2019 Lexus GX460, Factory Fill Rear Differential Toyota 75w85 GL5, 15833 miles

[sds911]

Drained the front and rear differentials on the GX460 and ran UOA on rear diff only. Toyota/lexus Factory fill 75w85 with 15,833 miles on the GX460 and diff.

Good mix of highway and city driving, with car top carrier use.
Refilled with Motul Gear 300.

 

[dnewton3]

Given that it was FF, that's not bad Fe for the first run at 16k miles.
I'd leave the Motul in there for a long time. Maybe run it to 100k and change again. With diffs, the break in is critical. After that, unless you submerge it in a river crossing, they will be find with long OCIs.

 

[sds911]

I may change it again at 30k, b/c transfer case will be due at that time. But, that could be a couple years from now, as I am not putting much mileage on either of my vehicles.