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 > Dodge ram 1500 with 3.55 rear end

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panamacamper1

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Posted: 07/01/12 07:07am Link  |  Print  |  Notify Moderator

If I move to 3.92 rear end will I see, feel a difference? Fuel, hills, take offs, etc. I don't want to waste money just to say I have 3.92s
Also, while on topic, what about cold air intakes. Fluff or needed to improve TV?

jmtandem

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Posted: 07/01/12 08:15am Link  |  Print  |  Notify Moderator

Quote:

If I move to 3.92 rear end will I see, feel a difference? Fuel, hills, take offs, etc. I don't want to waste money just to say I have 3.92s
Also, while on topic, what about cold air intakes. Fluff or needed to improve TV?


Panama,

It all depends on what you are planning to tow. The Dodge towing guide will provide information on the 3.55 gears and what they can tow. I would not get 3.55 gears unless the trailer to be towed is very light.


'05 Dodge Cummins 4x4 dually 3500 white quadcab auto long bed.
'09 299bhs Tango.

wmoses

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Posted: 07/01/12 08:56am Link  |  Print  |  Notify Moderator

panamacamper1 wrote:

If I move to 3.92 rear end will I see, feel a difference? Fuel, hills, take offs, etc. I don't want to waste money just to say I have 3.92s
Also, while on topic, what about cold air intakes. Fluff or needed to improve TV?

You need to share more information to get a useful answer. Starting with what are you pulling?

My truck which is my daily driver has a 3.08 rear end and works very well as my trailer is just over 1/2 the rated capacity.

Moving to a lower rear end will produce the differences you mentioned but you will pay for that at the pump. There is no free lunch.


Regards,
Wayne
2014 Flagstaff Super Lite 27RLWS Emerald Ed. | Equal-i-zer 1200/12,000 4-point WDH
2010 GMC Sierra 1500 SLE 5.3L 6-speed auto | K&N Filter | Hypertech Max Energy tune | Prodigy P3
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OregonTRX4

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Posted: 07/01/12 10:29am Link  |  Print  |  Notify Moderator

My 2010 with 3.92s gets 10mpg towing 4800lbs and the truck loaded to max. This is while towing the Oregon coast(lots of hills and what not.) 12mpg towing on flatter ground at 55 mph. Non towing is 17.5mpg mix of city and highway and 20mpg just highway. Wish I could comment on how much quicker it applies power to the ground but I have never driven a hemi with 3.55s.

We Cant Wait

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Posted: 07/01/12 11:42am Link  |  Print  |  Notify Moderator

With my Dakota the 3.55's had a 5000lb towing, but going to the 3.92's the towing was 7000lbs, so there is a difference in not only capacity, but fuel economy, pulling hills, etc.

aucoot

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Posted: 07/01/12 11:59am Link  |  Print  |  Notify Moderator

Drive a 2011 Ram 1500 with 3.92, & 20" wheels. Tow a 32 Rockwood Signature Ultra-lite. Been up through White Mtns of N.H. with no problems. The tranny does the work (shifts finding correct gears). Fully loaded trail max of 8500 lbs, truck towing max is 9900.

MitchF150

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Posted: 07/01/12 12:24pm Link  |  Print  |  Notify Moderator



* This post was edited 07/07/12 09:58pm by MitchF150 *

RoyB

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Posted: 07/01/12 12:38pm Link  |  Print  |  Notify Moderator

I am assuming this is may be why the 3:73 gears in the fords are so popular. This is the half way split with good power and better fuel mileage... i.e. for lighter loads and best gas mileage you would use the 3.55 gears but your pulling power is very much diminished... For the heaviest loads and more power to the wheels you use the 4:10 gears... Gas mileage suffers big time using the 4:10 gear ratios...

On my 4200lbs loaded OFF-ROAD POPUP I am using the 3:73 gears in my F150 and I do very well trucking down the roads with this setup. I get 19-21 MPG sometimes especially when I am using SHELL gasoline products. Have no idea why that makes any difference but it does.

The other strange thing is my F150 get almost the same gas mileage whether I am pulling the 4200lb low height POPUP trailer load or not...


My Posts are IMHO based on my experiences - PM me
Roy and Carolyn
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bsbeedub

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Posted: 07/01/12 01:30pm Link  |  Print  |  Notify Moderator

I went from 3.55 to 3.92 in my 2003 with the 4.7. Quite noticeable when not towing. I never towed with the 3.55 so I can't compare. I changed because I knew I needed the extra grunt. I couldn't imagine towing with the 3.55 though since there was not much grunt not towing. Good upgrade.

As for the cold air intake, headers, tuner, etc. there was a guy on here that did these and said it was nothing but a waste of time and money. I was very close to doing them until I read his real world opinion. I guess I saved myself some bucks.


Bob & Susan
Shelby the Beagle
2003 Dodge Ram 1500
2011 Gulf Stream Ameri-Lite 23BW


panamacamper1

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Posted: 07/01/12 02:08pm Link  |  Print  |  Notify Moderator

Sorry I should have added more info. I have 20 inch rims. And the 5.7 hemi. I have a shadow cruiser 280qbs.

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