series 2 automatic gearbox set up

[keri]

Hi all does anyone have or know where  can get a set up guide/manual for the gamma automatic ap box I'm looking to set up the kick down cable as at the moment i only  have half throttle movement as it is being stopped going to full throttle by the kick down cable where it attatches to the pivot arm on the gearbox it seems to hit the stopper bolt on the gearbox at half throttle this cannot be correct? any ideas, I've not driven it on the road yet to test the box but it selects gears and goes back and forward so far so good. i can ad pics if it helps
thanks
keri