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2014 Summit 5.7 4wd 20" tires swapped to 18", added all skid plates
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To me, that read doesn't clarify if I'm expected to enable it at highway speeds while towing and no harm will be done. Everything seems like a hill while towing 5540 lbs.

If it's enabled and I'm in the passing lane is it ok to hit around 4000 RPM to finish the pass?
You can engage and disengage it anytime at any speed. Yes, it's ok to hit 4000 to finish a pass.
 

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2014 Summit 5.7 4wd 20" tires swapped to 18", added all skid plates
Joined
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3,124 Posts
When I tow I put the transmission in D, set the cruise control and don't have any problems maintaining speed even on the steepest highways. Based on how it performs it even seems that the programming figures out when it's been "hunting" and stops doing it. The 5.7 isn't a low speed torquer so it stays up in the rpm band.
 
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