Well, I took my Xterra into a different Nissan dealer today to check out why my transmission is grinding when I shift into 4th. Of course this only started after the last service about a month ago. They think it's a synchro and are going to rebuild it. They said that they couldn't even tell what type of fluid was put in it. I would take it back to the dealer that serviced it, but they where under water last week and are closed!!!
Originally posted by ElectroKen:
Be wary of any gear oil with a GL-5 rating on the label. They can make the gearbox feel notchy, and worse, may contain compounds that can harm the "yellow" metals in your transmission's bushings and synchronizers.
In my limited experience I've found only 2 aftermarket oils that work well in the X manual transmission. They are:
1) a 50/50 mix of Redline MT-L and MT90 and 2) Amsoil MTG.
I'm sure there are others, too.
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