[Michael C Henry]

Notice how when we start going away from the middle of the mild to wild thing it starts requiring attention never needed before. On the normal stock open differential, tire stagger was never an issue. I know that tire stagger can make or braek handeling on all sorts of race cars including dirt race cars. NASCAR crews have tire specialist on every crew that every weekend take a stack of forty tires and make ten sets of tires using the demensions of those tires. NASCAR uses locked rear ends because the shifting weights forces would never let a limited slip or open differential get anywhere near the traction needed. Who ever worried about the tires not matching on the old family sedan? I remember being concerned that the tires were about the same air pressures.
I had to drive one old shop truck, an 80s chevey pickup truck with a service box, automatic trans behind a 6.2 diesel. They were four wheel drive but I'd be surprised if it had any limited slip. When you accelerated you had to help the steering one way then when you'd let off the throttle you would have to hold the steering wheel the other direction. That was obviously the rear end shifting on the leaf springs the centering bolt had broken where the housing saddle was located and clamped allowing one side of the rearend housing to shift its location forward and backwards of center causing a sift in the allignment. Ever notice when following in traffic all the pickups that are dog tracking down the road? I rember hearing about horror stories about air lockers breaking an axle while going a planned straight dirrection and making sudden unplaned hard turns. It just keeps getting more complicated doesn't it?