Differential and T-case Oil (3 Viewers)

[xenn]

Has anyone done their diff and transfer case oil? trying to get most of the parts now.
So far I got

12157-10010 - Fill plug washer both rear and front
12157-10010 - Drain plug washer for rear
90430-24017 - Drain plug washer for front

OIL
08885-81060 - 75W85 LT
Seem to not be able to find it in toyota parts store. Was wondering if anyone recommends a 3rd party oil
Looking into Motul Gear 300 LS 75W90 - does anyone have experience with this oil?

let me know if I'm missing anything.
thanks

 

[Rednexus]

You probably don't need to replace the drain or fill plug washers. I've re-used mine many, many times.

Mobil Delvac is a good synthetic 75W90 that does not include a limited slip additive (almost every other gear oil does - the mentioned Motul seems to indicate that it includes it as well). The Mobil runs very quiet in the transfer case and stays clean. It can be hard to find at parts stores, so I usually get a few quarts at a time from Summit Racing. Right now it's $12/quart, but I've bought it as low as $9 quart.

 

[xenn]

You probably don't need to replace the drain or fill plug washers. I've re-used mine many, many times.

Mobil Delvac is a good synthetic 75W90 that does not include a limited slip additive (almost every other gear oil does - the mentioned Motul seems to indicate that it includes it as well). The Mobil runs very quiet in the transfer case and stays clean. It can be hard to find at parts stores, so I usually get a few quarts at a time from Summit Racing. Right now it's $12/quart, but I've bought it as low as $9 quart.

I thought we need the limited slip additive?

 

[Rednexus]

I thought we need the limited slip additive?

The GX transfer case is a Torsen limited slip. It uses worm and spur gears to send torque around, as opposed to a conventional friction clutch limited slip differential (which you'd typically find in a truck rear axle). The Torsen shouldn't need any friction modifier as it doesn't use friction plates to reduce slip. I'm not sure that using the friction modifier will hurt a GX transfer case, but at the same time I'd rather not chance it, and the Mobil Delvac fluid is inexpensive enough and works well enough that I've kept using it.

 

[xenn]

The GX transfer case is a Torsen limited slip. It uses worm and spur gears to send torque around, as opposed to a conventional friction clutch limited slip differential (which you'd typically find in a truck rear axle). The Torsen shouldn't need any friction modifier as it doesn't use friction plates to reduce slip. I'm not sure that using the friction modifier will hurt a GX transfer case, but at the same time I'd rather not chance it, and the Mobil Delvac fluid is inexpensive enough and works well enough that I've kept using it.

learn something new everyday! thank you for the info
I got some Liqui-moly Fully Synthetic Hypoid Gear Oil (GL4/5) SAE 75W-90 lying around from my old car that i never got to use. its enough to do rear and front diff so i might use that then when the time comes lol and doesn't have the LSD additive.