Hi there guys.
Did my first trans tune on a VYII Holden R8. Interesting experience with very good results!
The trans had the usual clunky down shift and slow sloppy upshift under hard acceleration. It also had that annoying TTC lockup in 4th gear that won't unlock when you hit a decent hill unless you really stab the throttle or pass 50% TPS or more. This means you are always reaching for the manual change to 3rd or suffer in silence and slooooowwww down
What amazed me was how different the car was to drive once we "got it right" !
The Upshifts were snappy yet not jerky giving a performance feel, the downshifts on light throttle were almost imperseivable, the TTC was hardly noticible on lockup.
And best of all, the moment you hit a hill and needed a bit more grunt the TTC unlocked at about 40% tps (standard about 52%) and away you went. The customer was very impressed and so was I.
Thanks for all the good info and tuning tips on this thread !

Mike