I am dubious that gearing down for the sake of gearing down does anything to slow you down. Diesels do not have a vacuum, as opposed to a gasoline engine, the only reason to gear down is the keep the RPMs up so the Jake can do its job. If the Jake is doing its job in 6th gear by holding the coach from gaining speed, all the better.
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2001 Newell #579
tow a 2011 Honda Odyssey
1935 Mercedes 500K replica
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