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  #21  
Old 09-02-2013, 08:57 PM
crabjoe crabjoe is offline
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Quote:
Originally Posted by SM259 View Post
The 3.92's will tow about 4,000 pounds more than the 3.21. I am a little puzzled why the Ram 1500 with the Hemi/6 speed transmission and 3.55 gears tows 2,000 pounds (8450 lbs) more than a Hemi/8 speed with 3.21 gears (6400 lbs)?
Lower gears allows for less stress on other driveline components. Be it the ujoints, drive shaft or what not....
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  #22  
Old 09-03-2013, 06:02 AM
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ramit355 ramit355 is offline
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All along the Ohio River from Pittsburgh past Cincy is hills. Not all of Ohio is flat. South Point Ohio far south in Ohio you can go is Across River from W. Virigina with big hills!
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  #23  
Old 09-03-2013, 08:25 AM
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gwilburn gwilburn is offline
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Quote:
Originally Posted by ramit355 View Post
All along the Ohio River from Pittsburgh past Cincy is hills. Not all of Ohio is flat. South Point Ohio far south in Ohio you can go is Across River from W. Virigina with big hills!
The county I live in (in MD) is surrounded by WV on 3 sides, PA to the north. It's either up or down here. At 2700' you loose some HP too. I never get the MPGs I'm supposed to.
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  #24  
Old 09-03-2013, 11:02 AM
bugalaman bugalaman is offline
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I'm about ready to order my 2014 Ram and am still undecided about the rear end. Gas mileage isn't that important to me, but neither is towing. How much quicker does a Hemi with a 3.92 accelerate than one equipped with a 3.21? Does gas mileage really differ that much? Should I expect 15/21 MPG with the 3.92? Again, towing is the least of my concern. Does the benefit of slighly better accelearation outweigh the benefit of better gas mileage?
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  #25  
Old 09-03-2013, 11:10 AM
Driver72 Driver72 is offline
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Quote:
Originally Posted by bugalaman View Post
I'm about ready to order my 2014 Ram and am still undecided about the rear end. Gas mileage isn't that important to me, but neither is towing. How much quicker does a Hemi with a 3.92 accelerate than one equipped with a 3.21? Does gas mileage really differ that much? Should I expect 15/21 MPG with the 3.92? Again, towing is the least of my concern. Does the benefit of slighly better accelearation outweigh the benefit of better gas mileage?
This is the perfect reason why they should of kept the 3.55 axle ratio on all the Hemi's and you are just like me and the reason I got the 3.55's on my 2013 Laramie. It's the perfect combo for customers like us.

However, since that is not an option now, this is what I concluded.
I'd rather go with the 3.92's than the 3.21's

Reason is simple: Since the difference in gas mileage isn't going to be THAT great, say 1.5 mpg, for the average person who drives 12,000 miles a year, that works out to be about 45 gallons more gas. At the current national average of $3.70 a gallon, that's $166 a year more you'll spend in gas with the 3.92's

That is not really that much, and worth it to have the ABILITY to tow more IF NEEDED, and not only that, the ABILITY to accelerate faster IF NEEDED.

The issue with the 3.21 is that it's only advantage IS slightly better gas mileage. That's it.
AND, personally, I feel the 3.92 axle ratio truck will have better resale value. Why?
Because most people who buy trucks aren't overly concerned about getting 1-2 mpg better gas mileage. What they ARE concerned about and desire is the ability to tow if needed.
So somebody looking to buy a 3-4 year old truck to tow their 8000 lbs boat and trailer, will have no desire for the 3.21 axle ratio.
And I don't know too many people looking to buy a used truck that gets only 17-18 mpg average anyway who will say, "I need or want a new truck to do the things trucks do best, and I want to get a 3.21 axle ratio so I can save $150 a year in gas over the 3.92"

I'll be ordering the 3.92 since I can't get the 3.55's on the Laramie anymore.
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  #26  
Old 09-03-2013, 11:22 AM
Darwin00537 Darwin00537 is offline
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I wish my truck had come with the 3.55 like I ordered, but I've decided I'm OK with the 3.21. The 3.92 will get worse gas mileage, it will cruise at a higher RPM no matter what speed you're going, that increas in RPM results in more driveline wear, more cabin noise at cruise speeds, and it'll shift more often (and may even be slower overall because of all the shifting).

If you read the reviews last year on the 2013 trucks you'll remembder the 3.6 Pentastars with the 3.21 tranny have really good 0-60 times and is the engine/tranny combo all the reviewers were gushing over. I can't imagine the Hemi with a 3.21 will be a slouch.

If I towed often and lived in a hilly environment I might reconsider. I'm just throwing my thoughts out so you can see both sides of the arguement.
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  #27  
Old 09-03-2013, 11:42 AM
Driver72 Driver72 is offline
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Quote:
Originally Posted by Darwin00537 View Post
I wish my truck had come with the 3.55 like I ordered, but I've decided I'm OK with the 3.21. The 3.92 will get worse gas mileage, it will cruise at a higher RPM no matter what speed you're going, that increas in RPM results in more driveline wear, more cabin noise at cruise speeds, and it'll shift more often (and may even be slower overall because of all the shifting).

If you read the reviews last year on the 2013 trucks you'll remembder the 3.6 Pentastars with the 3.21 tranny have really good 0-60 times and is the engine/tranny combo all the reviewers were gushing over. I can't imagine the Hemi with a 3.21 will be a slouch.

If I towed often and lived in a hilly environment I might reconsider. I'm just throwing my thoughts out so you can see both sides of the arguement.
I do agree with many of the things you are saying.

This was the reason I order my Ford Mustang 5.0 a couple years ago with the 3.55's instead of the standard 3.31 or the 3.73's
With the 3.73's it was more difficult to launch and for drag racing required a shift to 5th just before hitting the 1/4 mile stripe.
in the 3.73's 4th was good for 110 mph, but the cars would trap in the 111-112 mph range.
The 3.55's were good for 117-118 mph in 4th.
Not only did it then reduce the shift before the 1/4 mile stripe, but allowed for a bit more aggressive launch without as much spinning.
It also left room for some basic mods (intake and tune) and you could still finish the 1/4 in 4th.

However, the Ram truck is not a pony or sports car.

The 3.92 gears will surely have it's acceleration benefits in this big heavy truck.
The 3.55's can easily light up the tires on these trucks with traction control onff and hammering the throttle, so the 3.92's will be worse.
But in 4WD that's a different story.

The 3.92's MAY or may NOT get worse gas mileage, it really depends on the conditions and the driver.
The advantage of the 3.92's is that you don't have to dip as deep into the throttle to accelerate with traffic. That means less rpms are being used to accelerate with or slightly ahead of traffic. And often in those circumstances, in city driving, a lower gear ratio will get the same gas mileage as a taller one that requires the driver to dip into the throttle a tiny bit deeper to accelerate the same speed as a 3.92 truck (or to accelerate with traffic).

That extra bit of dipping into the throttle means more fuel being used.

Granted, if you are a freeway driver primarily and on low altitude and no mountains, a 3.21 truck will get better gas mileage.
But again, it's minimal and to me, not worth the loss of acceleration or the ability to tow more IF NEEDED, and in the occasional situation where you do need to accelerate harder than the car/truck next to you, or pass a semi swiftly, that extra grunt of the 3.92's will surely be welcomed.
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  #28  
Old 09-03-2013, 02:57 PM
JCC11 JCC11 is offline
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I currently have a 2013 Limited with the 3.55. Due to a paint defect, the dealer had me order a 2014 Limited. I keep the 2013 until the '14 arrives.

I love the 3.55 and it is definitely my preference. I was devastated to find out it was not available on the '14 Limited. So I chose the 3.92.

My biggest concern is not the potential for lesser gas mileage, although I am not happy about it at all. I am concerned about the engine running at higher rpm's more often when highway driving, leading to high rpm's, more wear, more noise, and many other things that are negatively affected. I know its not a sports car, but many of us don't drive 55.

Is there anyone else out there that tends to drive really fast on open highways? I know I do. People are saying thats its only a few hundred rpm's higher at 60 or 65. For better or worse, some of us drive faster than that. Many, many states have highway speeds posted as 75mph, and some highways are now 85mph. Cruising speed can wind up being a bit more still. The 3.92's out there are working a heck of a lot harder at those speeds than the other option rears. This bothers me. I'm less than pleased.

If any of you out there with a 3.92 drive extra fast on the highway, I'd like to hear your opinion on this. By the way, my truck with the 8 speed and 3.55 runs at almost exactly 2000 rpms at 80mph.
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  #29  
Old 09-03-2013, 03:49 PM
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gwilburn gwilburn is offline
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Quote:
Originally Posted by JCC11 View Post
I currently have a 2013 Limited with the 3.55. Due to a paint defect, the dealer had me order a 2014 Limited. I keep the 2013 until the '14 arrives.

I love the 3.55 and it is definitely my preference. I was devastated to find out it was not available on the '14 Limited. So I chose the 3.92.

My biggest concern is not the potential for lesser gas mileage, although I am not happy about it at all. I am concerned about the engine running at higher rpm's more often when highway driving, leading to high rpm's, more wear, more noise, and many other things that are negatively affected. I know its not a sports car, but many of us don't drive 55.

Is there anyone else out there that tends to drive really fast on open highways? I know I do. People are saying thats its only a few hundred rpm's higher at 60 or 65. For better or worse, some of us drive faster than that. Many, many states have highway speeds posted as 75mph, and some highways are now 85mph. Cruising speed can wind up being a bit more still. The 3.92's out there are working a heck of a lot harder at those speeds than the other option rears. This bothers me. I'm less than pleased.

If any of you out there with a 3.92 drive extra fast on the highway, I'd like to hear your opinion on this. By the way, my truck with the 8 speed and 3.55 runs at almost exactly 2000 rpms at 80mph.
My 2005 runs 2000 at 75 with the 3.92s. The final gear ratio is the same on the old 5 speed, the 6 speed, and the new 8 speed according to what I've seen. At 80 mph, you'll be running at 2100 or 2150 (my guess). And NO, you don't hear more noise. At that speed the wind noise is all you hear.

I totally agree with Driver72 - good luck selling a truck that will only tow 6000 lbs. Look at the tow ratings on Ford and Chevy.
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  #30  
Old 09-03-2013, 06:52 PM
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I had a 2011 6 speed with 3.92 it got about 18.2 Average all around driving. I live in hill country. I traded the 2011 for what I thought a 3.55 8 speed but rather a 3.21. It had little more than 3000 miles and got about 19.2 Average. I just got the 3.21 replaced with a 3.92 and the 3.92 only has 500 miles on it with average so far of 19.6!! The 3.92 runs about 1100 RPM @ 68 MPH. Its not working hard at all and no more noise than the 3.21 made. THE PULL IS AWESOME with 3.92 8 speed compared to the 3.21 8 speed!!! The above MPG's had bed cover on the first two trucks,but the new 3.92 right now does not have bed cover on it yet either! The 3.92 8 speed is AWESOME!!
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