Has anyone had success tuning this tranny above the ~ 600 RWHP level?
We've done many of these tunes, and been very happy with this tranny in the G8. But once we crossed the ~ 600 RWHP level, we can't seem to find a way to keep from hitting the limiter in the lower gears instead of upshifting on time. We've tried all the usual fixes, including padding the WOT shift points by 10%, 20% or more. Even in Manual mode, the tranny seems to prefer bouncing off the rev limiter over upshifting. Fourth gear and up is fine, lower boost is fine, and lighter throttle is also fine.
Thanks in advance for anyone who's had some success with tuning this tranny in high horsepower applications.