Originally posted by DerekB
You basically_need to think about the direction of wheel rotation. You want the wheels to actually try and tighten the nuts when they are moving. So the left side of the car needs to have the reversed thread since the forward momentum of the wheel would try and loosen the nut.
Is it the wheels that are tightening the nuts or the wheel hubs that are trying to drive into the nuts. If the wheel hubs are trying to drive into the nuts then the right threaded nuts should go on the left side and the reverse nuts go on the right. I may be wrong but since the wheels are attached to the hubs, I'd think that the wheel/hub assembly would work as one and both would try to drive into the nut requiring the reverse threaded nuts to be installed on the right side of the car.