I went drag racing this last weekend with my 2005 hemi 2wd. I tried turning off the overdrive with the button on the shift selector but the overdrive kept coming on at 5200-5300 rpm. Does anyone know how to keep overdrive from kicking in until at least 6,000 rpm? I have a Diablo Trinity and the only shift points I can see that you can change are the 1-2 and 2-3 and not the overdrive. By the way I ran 14.02 but I think I can get into the 13.80's if I can keep it from going into overdrive. Any helpful tips would be appreciated. Thanks.