Hello john in LA. There is still a little confusion on how the tandem axles work. Under good road conditions inter-axle differential unlocked each wheel receives 25% of the power say 100 units of power input. With poor road conditions 100 units of input inter-axle differential unlocked, each wheel receives 10 units of torque for a total of 40. Poor road conditions inter-axle differential locked front differential 20 units 10 each wheel, rear axle 50 units 25 each wheel for a total of 70. The inter-axle is used in rain as well as snow conditions and can be shift it at any time is needed. As you can see in the locked position the rear unit has the bulk of the load. On a wet road the system make it for a safer driving condition. These are the rockwell specs. Guido.
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