"Underdrive", and times the rear tandem double-reduction ratios could and will
cause something to give. Use your power wisely.
Don't shi[t your aux box on the run. Come to a stop first and then select the aux box range that will do your job. Keep
with that ratio until you stop again. The aux box is a heavy duty type and is not Intended as a splitter transmission. Don't
complicate It and round-off gear teeth!