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Discussion Starter #1
When towing with the preloaded tow tune on SCT X4, should i still put the truck in tow/haul or is that pretty much what the tune does to the tranny on its own?
 

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Rookie diesel tech
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103 Posts
most of the time tow haul prevents the trans from shifting into the overdrive gear and creating high egt's because the gear ratio is under 1
 
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