I've hit the limiter several times - speedo usually reads 116-118 but I haven't checked it against actual (GPS positioner). From what I've read and remember from past discussions, it's not the drivetrain that's forcing the limiter, it's actually the tire requirement - Isuzu wanted to market the VX using cheaper ST tires instead of going to V-rated or other with stiffer sidewalls, so they limited via ECU to keep the rating. At some point one would hit the physical/mechanical limits for the tranny and TOD anyway so it's probably a moot point.
-- John