Vr auto gear box

[Jacko]

Hi guys I have a vr v8 5L( skid car ) auto box and when I skid it I lock it in 1st but changes automatically to another gear I want to be able to
Hold first how do I stop it from doing this ? Any help would be good thanks guys and girls

[Holden202T]

there is plenty of info here on it:

viewtopic.php?f=7&t=179&p=1855

on the 2nd page in particular there is info on how to change the tune for what you want to do.