differentials oil change question

The front diff, rear diff and transfer case all have crush washers. Part numbers are:

Rear Diff drain and fill plug: 12157-10010
Front Diff fill plug: 12157-10010
Front Diff drain plug: 90430-24003
Transfer Case fill and drain plug: 90430-A0003

There super cheep, probably less than $10 bucks for all the crush washers.
 
But what’s the difference between redline High performance and the other one

The "NS" stands for 'Non-slip', that version lacks friction modifiers. It's intended to be more suitable for transmissions and transaxles, where the slipperiness of the standard 75w90, can cause issues with synchros or clutches in limited-slip diffs.

I'd use the 75w90 in your diffs. Although Redline does sell 75w85 which meets the current Toyota CAFE-inspired spec for the diffs.

Redline also sells this which meets the Toyota spec for the T-case: Red Line Synthetic Oil. MT-LV 70W/75W GL-4 Gear Oil

Although the Redline 75w90 would be just fine in your VF2A transfer case too.
 
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I guess that would be my choice to cover rear and front if needed.
 

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Just so I'm clear. I would NOT use the 75W90NS in the diffs. The standard 75W90 would be preferable.

We use lots of Redline products in a professional racing application.
 
This is spot on info and exactly what I experienced. I did my rear diff at 2966 miles and I was shocked at how the fluid looked and the amount of metal shavings on the magnet. One thing I would add is swapping the transfer case fluid from factory fluid to a 75-90 weigh gear oil smooth out the overall function of the transfer case.

For the transfer case oil I would only recommend using Toyota Transfer Case oil. I don't believe there is anything on the market that matches there specification. Toyota Transfer Case oil is specific for our 5th gen 4runners, it's expense but use the correct oil for this transfer case.
 
Redline is a fantastic product and highly recommend but I like the easy bags that Amsoil has. No need to pump the oil into the diff or transfer case using a hand pump. With the bag you just squeeze the fluid in and your done. Both are fantastic gear oils.
I’ve never seen those . Who sells them ?
 
For the transfer case oil I would only recommend using Toyota Transfer Case oil. I don't believe there is anything on the market that matches there specification. Toyota Transfer Case oil is specific for our 5th gen 4runners, it's expense but use the correct oil for this transfer case.

been running redline MT-LV in the transfer case for 20k miles in my 2010 and no issues, no noises, no improvement, but nothing has exploded yet.

Also using redline 75w85 in the rear diff for about the same mileage. Havent gotten around to swapping front differentail.
 
I checked my rear differential fluid today and that’s what i see. It’s dark but at the same time it still clear. What do you think change it or give it another 5-7k more miles.
 

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2010 at 100 thousand miles. I off-road all the time and go through a lot of water crossings. I just changed both diffs and transfer case. No sign of water. You'll notice a milky substance floating because water and oil don't mix if contaminated. My gear oil was fairly clear and smelt like good oil. It shouldn't have a burnt smell. Also check your magnets. This will tell you how well the conditions are within your gears. Mine had no chunks or shavings. Which is very good. A baby powder like consistency of metal dust is fine.
 
You just changed it for the first time at 100k and 11 years? Gear oil starts off with an unpleasant smell and only gets worse with time.
 
HD trucks normally run 250k mile diff changes.

My F250 manual says never change the diff oil.

Toyota says you don't need to change unless you're a severe duty driver.

I've changed my differentials multiple times, so they've had fresh oil regularly. Lol.

The only 5th gen I know with 300K plus on the odo had diff oils changed every 100k, never changed trans fluid (still works well and shifts normally).
 

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