I can't find the OEM 08885-01806 anywhere. I keep finding 08885-01906. My 23 just hit 30K and my 22 is at 55K. I perform the diff and transfer case service every 30k. This is designated TRANSFER GEAR OIL LL whereas the previous fluid was desigtnated TRANSFER GEAR OIL LF. The old stuff was ~$100 a liter, the new stuff is nearly $200 a liter.

 

... use Ravenol like most everyone else who does not go 75w-90 (like most dealerships).

 

yeah, my rigs are still under fact warr. So I try to use factory fluid for the transfer case.

 

... Ravenol meets the Toyota spec.

 

If it helps, I use Red Line 50604 MT-LV 70W/75W GL-4 on my GX-460, very, very good oil for the transfer case!

 

Red Line MT-LV is extremely close to the Toyota 75W Transfer Gear Oil, even the ester % is probably almost identical based on the virgin TAN numbers.
The Ravenol add pack is a little "light" compared to the Red Line & Toyota 75W oils.

 

+1 for Redline 50604 or Ravenol's 75W!

I personally buy the Ravenol kit for all 3 services.

 

Done the same now 2 times (~30k and ~60k), used Ravenous kit. currently at 77k now, will most likely order same kit for the 90k service.

 

I’ve now had 3 dealers admit that they just use “shop fluid” 75w90 gear oil. Given this, I don’t think Toyota would have a leg to stand on if they denied a claim for using a non Toyota fluid in there. In fact my local Lexus dealer apparently only uses it if specifically requested. The dealer I visited with on Saturday did have 1 liter in the old style can (that requires an oil can tool to open). They were unable to make sense of the part numbers, they still had the old number, but you can’t search that in the public facing Toyota online parts ordering systems.

 

This is what I am using on my GX, planning to replace every 30k miles (fluids) and every 10k (greasing)

Differentials:
Yuko 75-90 API GL-5


Transfer Case:

RedLine MT-LV 70W/75W



Drive shafts (6 points zerks)

Valvoline Moly-Fortified Full Synthetic Grease



Valvoline Moly-Fortified Full Synthetic Grease

 

... Toyota recommends standard multi-purpose (MP) lithium-based NLGI #2 on the u-joints ... and molybdenum-fortified on the slip yokes ...

 

... Toyota / Lexus dealerships are long known to use 75w-90 in the transfer case ... convenience and cost benefit of bulk oil ... and do not even use the Toyota recommended / Toyota branded 85w-90 in the differentials. Logic argues that the 75w recommendation in the transfer case is a CAFE contribution.

The Toyota 75w is hard to find, extremely expensive, and requires hazardous (ground) shipping in most states.

 

Although I know many use it I don't think a 75W-90 GL-5 gear oil is an ideal match to the transfer case.
Not because of the viscosity but because most GL-5s additive package is hard on the yellow metals in synchros.

The friction modifiers for clutch type limited slip diffs that come in most GL-5s may mess with the Torsen's function as well, they certainly effect the function of worm gear type limited slip diffs.

A 75W-90 GL-4 manual trans fluid would be a better match for the transfer case.

 

If wanting to stay with OEM for Transfer Case Fluid - is $190 08885-01906 (as the Op posted) the correct replacement part # for the "Genuine Toyota Transfer Case Gear Oil LF 75W" / 08885-81080?

Is the replacement part 08885-01906 a different formulation that is no longer considered hazardous shipping? Is it still as good/effective while costing 2x as much? Or just more "environmentally friendly" for that added cost?

Or just go with Red Line MT-LV and call it a day? I'm in a 2017 at 191,000mi with 50k or so on the current Gear Oil LF if that sways any decisions...

 

Thank you ASE! I will pump the red valvoline MP on my next greasing for the U joints!