Changing all my oils. Is it safe to run royal purple 75w90 gl5 for rear diff transfer case and tranny?

What is rear axle but torque spec

 

NO its not. Use Diaqueen (oem) until you read up on what works. hate to be blunt--but it addresses your question and get you down the rd without a huge expense. Lots on this here.

 

So where can I use the 75w90 gl-5 oil on this car

 

It says in another post 75w90. Sever.

 

So what can I run in the transfer case. The tranny and the rear diff. Because I bought this stuff royal purple 75w90 full syentochic with friction modifier equivalent to gl5 oil

 

Bump

 

The OEM stuff, Diaqueen, are among the best of drivetrain fluids. Proven over and over again. Aftermarket names that are widely popular are Redline and Amsoil.

 

The rear diff and tranny you can try other fluids (amsoil and redline cocktail) but the Transfer Case is OEM only. Some may say otherwise but using Diaqueen is guaranteed to work.

 

If you're asking for your Evo 4, I might suggest checking with the fellows on lancer register as they'll have MUCH more experience.

I can say unequivocally that the Evo 8 and 9 vehicles (the only ones sold in North America for these gens) are EXTREMELY finicky when it comes to drivetrain fluids.

IF you choose to run a fluid other than OEM in any of the cases, understand that there is SIGNIFICANT risk involved. Being that you're driving a grey market import, it would probably be advisable to ONLY run the OEM stuff, because IF you blow up your case... it's going to be tricky to get new parts.