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Thread: rear end ratio
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Old 06-07-2013, 07:47 PM
MrPiper's Avatar
MrPiper MrPiper is offline
Dodge Ram Forum Senior Member
Join Date: Aug 2012
Location: ATL
Posts: 119
Gender: Male
Vehicle: 2012 Ram 1500 Bighorn
Trim Level: 1500 Bighorn
Color: Black
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
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My 1500 Bighorn Crew Cab Hemi Positrac with 3.92 gear gets about 19.5 Hwy and about 17 around town. I also get about 11.5 towing in winter and about 9.9 towing in summer with air on and that's towing a 7K lb. trailer.

The only time I have seen significant mileage decrease is on the interstate cruising at speeds above 70mph. Even then, it's minimal decrease in mileage. I couldn't imagine why anyone would want to swap out for a lower gear.
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