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New to duramax, have hauling/tranny questions

3K views 20 replies 14 participants last post by  rolling thunder 
I tow regularly in the mountains and have found that in 6th the egts get hot and as soon as I get to any incline it wants to be in 5th anyways so tow haul and manual to 5th is my choice. Play around with it and see what you like the most. Hate to break it to you but your new truck will never hold back on grades like a manual tranny; sorry.
enjoy your new ride.
 
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