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Engine Specific Info and Questions => IDI Engine => Topic started by: Rabbit TD on February 22, 2009, 12:15:59 am
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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 :?:
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The vw trans has brass syncros.
Why are you super concerned about using gl5 in your trans if you're already using gl4 without issue?