got a xr6t making a rattling noise from the back of engine on the exhaust side and gearbox is acting like it is low on oil slipping.I live in brisbane who would be the best to go to gilroy's or the boxstop. The boxstop is fairly close only a couple of suburbs away as gilroy's is in toowoomba.The car is making 315 rwkw. Gilroy's put extra clutches in and doesn't mod the valve body as the boxstop mods the valve body but doesn't put extra clutches in as I know