Hi to all again poopsie here,has anyone got ideas on changing my current diff ratio which originally had 3litre crd engine to 3.5 to 1 in order to reduce revs on highway as ls3 conversion has plenty of power and does not need to rev at 2300rpm at 100 kms per hour on hyway or should i leave it at that.I understand that the auto 4.8 patrols had 3.5 to 1 ratios.thanks again.