View Single Post
Old 07-25-2013, 03:48 PM
topgun's Avatar
topgun topgun is offline
Dodge Ram Forum Senior Member
Join Date: Jun 2009
Location: W PA
Posts: 598
Gender: Male
Vehicle: 2012 Ram 2500 CC 4X4
Trim Level: Outdoorsman
Color: Black
Rep Power: 0
topgun will become famous soon enough

Originally Posted by skytop View Post
The 3.92 is a poor choice for fuel economy unless you enjoy forking over your cash big time at every fill up.
Not necessarily true, it all depends on your terrain. I had the 3.92 gears in my 09 QC Hemi and always got better MPGs than my friends with the 3.55's. The reason being, the motor did not lug down as much. 8spd, 5 spd, doesn't matter as the top OD gear is the same. Lots of threads on this. If you have any hills at all, the 3.92's are the way to go.

As an example at 55 mph, your RPMs are only about 1,300 in 8th gear with the 3.55's and 33" tires.
Undercover SE, Corsa Cat Back, Amp Powersteps, Amp Bedstep, Bedrug, Mopar Tailgate Lock, Mopar Fold Flat Floor, Mopar Flat Rubber Splash Guards, Cooper AT3 285/70/R17's, S&B Intake, Moroso Catch Can

Last edited by topgun; 07-25-2013 at 04:21 PM.
Reply With Quote