Does anyone know what tire is the drive tire is on a 69 coupe? Is the passanger or drivers side that spins first? If I leave a burn out my passanger side leaves the rubber. I always thought it was the drivers side. Is there some thing wrong with my gears?
The tire with less traction will spin first. Usually the passenger side has less weight on it. Also, due to the direction that the driveshaft turns, engine torque is trying to lift the passenger side tire.
There's nothing about the components inside the differential that applies load to one tire first. The passenger side is just more likely to spin due to the reasons above.