Gear Lube recommendations

[4RSR5]

All fluids due to change on 90 3.0 3VZE with 200k miles. Thinking on Synthetics and curious to recomendations on brand or weight. Have 4WD/MT. I know it will be expensive, but would like to go synthetic on both diffs, M/T, Transfer, which is about 10 quarts. Best I can decipher all areas require 75w-90 except rear diff which recommends 80w - 90W or straight 80W. Not sure why such a small difference. No off roading with this vehicle, street use only. I think the only widely available synthetic here is Mobile 1, small amount Amsoil and some Redline. Any recommendations and advice, warnings, help appreciated. No known problems with vehicle as is.

 

[dkcase]

But, I have no idea what a 3VZE is..

From Google, I guess Toyota 4-Runner.

 

[unDummy]

Mobil-1 75w90 in the front/rearends and xcase.

For the manual tranny, use a dual rated fluid or manual tranny gear oil that should shift better then the Mobil1! I'm thinking redline/amsoil/royalpurple/specialtyformulation....

 

[4RSR5]

The tranny is what I most worried about as to what to use. Give me a hint on a dual rated fluid. I guess I've never read or seen it or had it referred to in that way. New to the synthetic world.

 

[4RSR5]

dkcase, correct in it being a 4Runner V6.