Hello, can someone give me advice into what gear (D3) or regular D should be used while towing a 20' Skipjack on a dbl axle trailer. What gear should I use without causing harm to transmission? Driving one way about 54 mi.
Generally always keep it in D and drive normally. D3 can be useful when descending grades to keep the speed down. D3 is NOT designed to be a pulling gear and can overheat the transmission.
Don't worry about the engine staying in the higher RPM range in Drive when ascending grades, etc., it is built for it.