Re: Manual Transmission Fluid: No service is required???
Sorry to bring this thread back from the dead. I'm looking at doing a flush/fill of my tranny fluid as well using Royal Purple 5W-20 synthetic. Only issue is the manual calls for engine oil meeting API SL or GF-3...and Royal Purple is API GF-5.
Wouldn't that harm the tranny? Especially the synchros?
Last edited by Indelibility; Jun 8, 2012 at 10:08 AM.