Medium and Heavy Trucks
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Thanks for asking your question. I will try and help you out.
No. Turning the speed up will not hurt the engine. The speed limits are set by the owner to control the truck from going faster than they would like. Turning up the speed to 75 or 80 will not hurt the engine.
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No sir it will not. If there was a chance of hurting the engines. They would not even allow it to be programmed for that.
Only thing you may notice is the engine will use more fuel at higher speeds.
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.