2012 2500HD CC SB with 6.0L and 3.73 ratio
Hi all, Took our first long trip with my newer tow vehicle. I went from a 2006 chevy Duramax to a 2012 6.0L gas with the 3.73 ratio. Now I fully understood there would be a difference due to it b...
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Not likely a 4.1 would allow you to hold 6th gear.
Now a 4.76 will allow you to hold 6th gear. But your overall gear ratio from engine to wheel would be the same as with the 3.73 in 5th gear. Nothing really gained except when unloaded your mileage will suffer at 80 mph as is the posted speed limit in much of Idaho and Utah now.
Gearing does not make more horsepower!
Now a 4.76 will allow you to hold 6th gear. But your overall gear ratio from engine to wheel would be the same as with the 3.73 in 5th gear. Nothing really gained except when unloaded your mileage will suffer at 80 mph as is the posted speed limit in much of Idaho and Utah now.
Gearing does not make more horsepower!
