You can spin the duallys in reverse because reverse is a MUCH lower gear. NO, there is no kickdown cable for your transmission. Your transmission is controlled electronically.
If the engine is bogging down or if the transmission is trying to start up in the wrong gear, either the check engine light should be on or the O/D OFF light should be flashing. The best course of action in diagnosing a problem with a computer controlled engine and transmission is to scan the computers that control them to check for fault codes.
P.S. If your truck is equipped with 4-wheel antilock brakes with Traction Control, it won't LET you spin your duallys in a forward gear...it is DESIGNED that way.
I want to thank you for your input. I have access to a code reader and had come to the same fix. I was not sure about the kickdown cable so that was very helpful as I have no Haynes to reference. I'm confident that this course of action will solve my problem. Thank you again, John Mason, Bakersfield, Ca.
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