I have the 3.92s too; column shifter and not in tow/haul or any other gear.

I figured it had something to do with the fuel saver but just like you said, wondered if it kinda defeated the purpose if I'm on the gas all the time.

 

Probably got 392 gears and slowing you down faster than a previous vehicle with higher? lower? gear ratio.

 

As 72COMO stated, it has more to do with the final gear than anything else. The taller the gear the more it will coast.
A 3.92 gear is a realative short gear compared to 3.57's or 3.21's and will not coast much at all.

 

I should add that I immediately noticed a more pronounced coasting deceleration with the Ram than with the '05 Durango Hemi I traded. Both the Ram and the Durango have 3.55 rearends too. I expect it is some combination of drag and friction that is more pronounced in the Ram than it was in the Durango, and after a month of owning the Ram now, barely notice the difference.

 

bringing the lulz!

 

i'm surprised that no one has suggested that maybe the truck may not be using its highest gear in high speeds. it could be stuck in 4 or something so when gas it let off, the engine braking is more pronounced.

I would suggest taking the truck for a ride and counting shifts to determine if all the gears are being used and the truck in is overdrive when cruising at highway speeds.

I have an almost fully loaded black sport with 20" rims, hemi, and 3.92's and i do not notice any kind of drag on the truck when i let off the gas .. my previous truck was a 1999 dodge dakota with 318 v8 and 3.21 gears ...
???????

 

That's why I asked if she was sure she was in Drive.

 

lol! good one

 

That's my guess, iDFSO. New for '10.

Question,,, are you 'feathering' the throttle back slightly when you want to maintain/slow down, or are you 'all the way off' when you notice this?

I'm guessing all the way off, and in doing so, I'd 'blame' the 'pronounced feeling of deceleration' on the iDFSO 'fully engaging'.

I can see where that might suck when coming up to stoplights, etc,,,
If you are like me, I try to take full advantage of the 'momentum' of the truck, and 'roll/coast' up to a light,,, (Mr. EZ Duz-it here!)

Come to think of it, I do that by letting off the gas all the way,,, If you have to 'feather' the gas to keep the iDFSO from engaging, I can see where that would be a PITA.

Now, if you were drive more aggressively, and HAUL BUNZ right up to the lights and then slam on the brakes, you'd probably not notice it so much! =)

 

It's a standard feature of the 2010 model hemi. When going of the throttle the 2010 model cuts off the fuel injectors to save some extra gas. 2009 and older models keep injecting a minimum amount of fuel when not pressing the accelerator.