Royal Purple Synchromax in every one of my vipers and Im always amazed at how much easier and smoother they shift after Synchromax. Also try some Royal Purple 75w140 gear oil in your rear diff. you will be shocked how much quieter your viper will be when cruising at 60mph.
I find AMSOIL Syn Man Trans/Transaxle 75-90W oil shifts great (better than Motul ATF), they back up with warranty, and have been told by Auto manuf guys that Royal Purple has additives that are not healthy so I haven't tried it.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.