Manual transmission fluid; use OEM?

[CoryM]

Originally Posted by Black_griffin6

I think I'll go back to OEM at this point, I need to know where know can find it.
Is Toyota WS ATF what Toyota actually uses in the Yaris?

You will be hard pressed to find OE bottles of fluid. Most dealers just use bulk, and actual OE fluid is near impossible to find and about $30+/L. Pretty sure it's P/N: 08885-81026

Get yourself some non-synthetic GL4 75w90 and you are going to be as good as it gets. May want to change the fluid again in a few months to get the last of the wrong stuff out.