I'm reading again about the gear oil for the o20 transmissions requiring the GL4 only oil and again I got the Amsoil MTG 75-90 GL4 as it worked fine in the last one I rebuilt, better have damn good seals in it though especialy the input shaft one and the axel flange seals. My question is that all the information I read everywhere on all forums say the GL5 is bad for all things brass especially the synchronizers rings. I've never seen a synchronizer anywhere that didn't have a brass ring so what is GL5 supposed to be used for anyway. Are there synchronizers that aren't made with brass rings and what are they actually made of :?:
Topic: GL4-GL5 (Read 1839 times)
