I haven't been able to find any GL4 tranny oil in my neck of the woods. I am going to use some Penzoil Synchrmesh MTF. It is speced for GM and Chrysler, but I use to use it in my Talon TSI with great results. Some Google action turned up that it is basically GL4 80W + additives. I'll post back here in 10,000 miles or so to let everyone know how it's doing.