I'm prepping and studying to do the 60K tune up myself (save the timing belt) and I see that Toyota calls for gear oil in some situation and "hypoid" gear oil in others.

Can anyone clue me in to the difference? I'm planning on switching to Amsoil synthetic and I don't see anything from Amsoil that says 'hypoid.'

My guess is that the synthetics will take care of any of the differential and/or transfer case fluid requirments.

Thanks Folks

 

Hypoid oil is for those slanted gears thingies that create more pressure than normal gears, hence needing better gear oil.

Just google it for an indepth.

 

Hypoid gear oil is generally GL-5, for use in the differentials:
- http://www.4crawler.com/4x4/index.sh...ntheticGearOil

You can usually use GL-5 in all the gear boxes, but GL-4 will work better in the transmission. It is not so much the GL-5 is "better" than GL-4 oil, they are just designed for different applications.

 

Yup.

GL5 or 6 (hypoid) gear oils in the front and rear differentials.

GL4 or GL5/6 for the manual trans and transfer case.