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  #1  
Old 12-26-2011, 11:59 AM
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Default The ultimate package?

In your opinions, what is the best package for performance, towing, and fuel economy? 3:92 vs 3:55, LSD or not, 5 speed vs 6 speed.
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Old 12-26-2011, 12:01 PM
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I’m guessing overall, 3:92 LSD 6 speed
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Old 12-26-2011, 12:26 PM
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What kind of weight and size will you be towing? I'll soon sound like a broken record around here, but when you talk about gearing, fuel economy, driveability, performance, etc., you're talking about having to make compromises somewhere at some point. You just have to pick your priorities in order and stack the deck to fit them. It's very logical to try and achieve the best in all categories, but it's usually a juggling act, and something will have to give a bit. The heavier the load you'll tow, or the bigger and less aerodynamically efficient the towed item is, the lower the gear may have to be. Plus, how big is your Ram? A full-boat, 4-door, 4WD, fully loaded pickup is going to suck some more power and fuel efficiency out of the engine and may also need lower gearing. My '12 Express 2WD with regular cab and short bed pulls my slightly-over-5000-pound travel trailer with ease with 3:55 gear. Your needs and results may vary.
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Old 12-26-2011, 12:58 PM
wbowyer wbowyer is offline
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Best with stock tires (from best to worst):
3.92, 3.55, 4.10
Best with a level and 33's:
3.92, 4.10, 3.55
35's and up:
4.10, 3.92, 3.55

Now if you're looking for best fuel economy every day you're not towing then a 2WD 4.7l with 3.55's and a 6-speed
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Old 12-26-2011, 01:12 PM
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Quote:
Originally Posted by TNC View Post
What kind of weight and size will you be towing? I'll soon sound like a broken record around here, but when you talk about gearing, fuel economy, driveability, performance, etc., you're talking about having to make compromises somewhere at some point. You just have to pick your priorities in order and stack the deck to fit them. It's very logical to try and achieve the best in all categories, but it's usually a juggling act, and something will have to give a bit. The heavier the load you'll tow, or the bigger and less aerodynamically efficient the towed item is, the lower the gear may have to be. Plus, how big is your Ram? A full-boat, 4-door, 4WD, fully loaded pickup is going to suck some more power and fuel efficiency out of the engine and may also need lower gearing. My '12 Express 2WD with regular cab and short bed pulls my slightly-over-5000-pound travel trailer with ease with 3:55 gear. Your needs and results may vary.
My truck is a crew cab 4x4, and I will be levelling the front next week, 2.5 inch. I do haul during the hunting season, not often. It is an everyday driver. Im trying to find the balance between performance and economy. I am currently equipped with 3:55 and no LSD (with the 4WD Auto) 5 speed. My fuel eco is terrible.
I will be inquiring with my dealership for an upgrade to 3:92, LSD, and possible 6 speed. What are your thoughts?
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Old 12-26-2011, 06:24 PM
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I'm not trying to be a smart ass but I think you got your buying process backwards. I think you bought first then decided what you needed instead of deciding what you needed then went out and bought something that matched your needs. If you are going to switch both front and rear diff's to 3.92 and add LSD and then change from a 5 speed to a 6 speed, I think you should seriously think about trading trucks. Your probably talking about 5-7.5K---if you buy all new parts and have the dealer install them.
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Last edited by Pull Ya; 12-26-2011 at 06:31 PM.
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Old 12-26-2011, 07:33 PM
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Quote:
Originally Posted by Pull Ya View Post
I'm not trying to be a smart ass but I think you got your buying process backwards. I think you bought first then decided what you needed instead of deciding what you needed then went out and bought something that matched your needs. If you are going to switch both front and rear diff's to 3.92 and add LSD and then change from a 5 speed to a 6 speed, I think you should seriously think about trading trucks. Your probably talking about 5-7.5K---if you buy all new parts and have the dealer install them.
Jay
By upgrading I meant trading in for a 2012
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Old 12-26-2011, 07:47 PM
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2011 models only have 5 speed transmissions

changing rear & front differential ratios to 3.92s can be costly
you will lose a bit more fuel mileage, but gain a little performance
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Old 12-27-2011, 12:46 AM
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Sorry, I misunderstood your question. Also I realize that the 2011 have a five speed, I was guessing the cost of replacing it with a new 6 speed, if it could even be done.
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Old 12-27-2011, 08:46 AM
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You will not ABSOLUTELY lose mileage with the 3.92. They multiple power and can actually make the truck MORE efficient, as needs less gas pedal to do the same work. Where the efficiency in the deeper gear is lost is at the very top end where the RPM of the truck can't settle as deep as it can with a higher gear (numerically lower).

Deeper gears (numerically higher) offer free power, yielding more responsiveness at all speeds and rpms. The LSD makes no difference.
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