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Message: [QUOTE="Mark Kovalsky, post: 399685, member: 1654"] Use it when you like how it's acting, and turn it off when you don't. There is no time you have to use it. There is no tow light on a 7.3L truck. Never had one. All it had was an overdrive off light. That's all it did, was prevent the truck from shifting to overdrive, and it also provided engine braking in first, second, and third gears that isn't there with the light turned off. Tow/haul in the newer trucks changes how the transmission operates to improve towing. It will shift to overdrive if the speed is high enough. [/QUOTE]

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