I'm not so sure I agree, Phil. If it spun the teeth off the ring gear while stationary, it means there was enough torque flowing through to the pinion to do the job but the ring was not able to handle the torque and make the tires break free and spin over. (this according to what everyone said happened)
A truck "should" have enough strength to break the tires loose if the truck is immovable without breaking something in the drivetrain as long as it's not a jerk on the drivetrain, ie dumping a clutch. Static load vs. dynamic load.
Now, I have no idea if going to a lower gear ratio would solve this if the gear itself is too weak to handle the load.
I'm not real sure about this one.
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