Do Scions have brass synchros? The manual says to use GL-4 or GL-5 oil, but those two are really very different oils. I am guessing they are listing both so that it's easier for the customer to choose oil. So the question is, does the tranny really require GL-4 and they are just listing GL-5 for convenience, or does the tranny really require GL-5 and they are just listing GL-4 for convenience?

 

i believe the synchros are brass. i sure saw a lot of it coming out on my first gear oil change..

 

Tamago, what fluid did you change to for the trans?

I'm going to go synth, but I've not decided what brand yet.