Rear diff oil??

Wow Toyota rear diff oil id crazy expensive!! What the oil to use. Is mobile 1 75-90 fine for my 2018 OR??

 

Any 75-90 will work. I use Royal Purple

 

Why are you changing the diff oil already?

 

I watched the video on the sticky page of do your own maintenance page. It looks like the is a lot of metal in there from the brake in

 

Diffs will last the lifetime of the truck. A lot of people only change every 100k. My Ford went 150k miles without a change

 

I hope your right. So the mobile 1 75-90 is fine to use in this rear diff with locker?

 

Yes.

 

Why is the Toyota rear diff oil like $50 a quart?

 

Who cares, oil is oil. Just make sure it’s synthetic and GL5

 

I used Valvoline syn.

 

That statement is true if you only drive it on the streets maybe. Even the Toyota manual specified that if driving in dusty conditions, towing or heavy loading requires a lot more frequent fluid change. I’d never push 150k on diff oil.

 

When your truck is over 200k are you really going to worry about it? I sure didn’t. Dusty roads won’t affect the diff.

My F-250 had 30 years exclusively in dirt roads and towing so whatevs. What does the manual say for diff changes? Is it even in there?

 

bah, synthetic for diffs, no thanks. Lucas 85w140, change once a year.

 

Totally agree I am running the same in mine without issue.

 

20k or 200k, yes I would. To each its own. Yes, manual says it in plain English, that where I got it from.

 

My dealer does not even stock Toyota differential oil, special order only. They use and sell Amsoil.

 

I recommend Red Line. Cheaper than OEM and the same wt.

 

I would strongly advise against this crap. It feels like water (probably spec'd that way with fuel efficiency in mind ) and you really don't need synthetic in the diffs.
Dino 80w90 in the front and tcase,
And Dino 75-85w140 in the rear

 

Because there's a sucker born every minute

 

There was a thread not too long about a gear lube study that was sponsored by Amsoil. In the end, it mainly showed that just about any name brand gear lube is good to go.