What's new
Forums
Members
Resources
Whopper Club
Politics
Pics
Videos
Fishing Reports
Classifieds
Log in
Register
What's new
Search
Search
Search titles only
By:
Members
Resources
Whopper Club
Politics
Menu
Log in
Register
Install the app
Install
Forums
General
Vehicle Discussion
3.5 Ecoboost with 3.31 or 3.55 rear axle?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="gone_fishing" data-source="post: 289852" data-attributes="member: 708"><p>With these 10 speed autos, I don't think having a lowest rear axle ratio available is as big of deal as it used to be (for towing purposes). With 10 speeds to work with, the transmission should be able to find a ratio that gives a good balance of power and economy. The ratio spread is a lot larger too (between 1st and final). Not like the old 3 or 4 speed days where you get maybe 2 non-overdrive gears to choose from for cruising (since most don't tow in OD..at least nothing heavy). 3rd gear might not be enough but 2nd gear shot the RPM's through the roof! Since you didn't have anything in between, it helped to have a lower axle ratio to help increase your RPM's and get torque to the ground (making 3rd gear more manageable). Also, these turbo gas engines have almost diesel like torque curves so they don't have to rev as much to make power compared to a NA gas engine. This gives you a wider power band to work with.</p><p></p><p>I don't know about the Fords but on some GM 1/2 ton models, going with the lower rear axle increases towing capacity (by a couple thousand pounds even). If it's the same way in the Fords, this might be worth looking into depending on how much you plan to tow. I doubt there is much difference in economy between these two choices anyways since they are so close together mathematically.</p></blockquote><p></p>
[QUOTE="gone_fishing, post: 289852, member: 708"] With these 10 speed autos, I don't think having a lowest rear axle ratio available is as big of deal as it used to be (for towing purposes). With 10 speeds to work with, the transmission should be able to find a ratio that gives a good balance of power and economy. The ratio spread is a lot larger too (between 1st and final). Not like the old 3 or 4 speed days where you get maybe 2 non-overdrive gears to choose from for cruising (since most don't tow in OD..at least nothing heavy). 3rd gear might not be enough but 2nd gear shot the RPM's through the roof! Since you didn't have anything in between, it helped to have a lower axle ratio to help increase your RPM's and get torque to the ground (making 3rd gear more manageable). Also, these turbo gas engines have almost diesel like torque curves so they don't have to rev as much to make power compared to a NA gas engine. This gives you a wider power band to work with. I don't know about the Fords but on some GM 1/2 ton models, going with the lower rear axle increases towing capacity (by a couple thousand pounds even). If it's the same way in the Fords, this might be worth looking into depending on how much you plan to tow. I doubt there is much difference in economy between these two choices anyways since they are so close together mathematically. [/QUOTE]
Verification
What is the most common fish caught on this site?
Post reply
Recent Posts
F
Bismarck roads and driving
Latest: Fester
1 minute ago
F
NFL News (Vikings)
Latest: Fester
10 minutes ago
Quiet Pellet Gun
Latest: 3Roosters
Today at 5:26 PM
Answer me this
Latest: BrokenBackJack
Today at 3:28 PM
More CWD NE ND
Latest: Fritz the Cat
Today at 12:57 PM
Coffee and sweet beaver
Latest: Maddog
Today at 10:59 AM
Riddle Me This.....
Latest: Maddog
Today at 10:55 AM
N
I Love This Bar (NDA)
Latest: NG3067
Today at 7:30 AM
Presidents who added the most
Latest: grumster
Today at 12:01 AM
F
Drotto adjustment?
Latest: Fester
Yesterday at 8:41 PM
Check your bags boys
Latest: svnmag
Yesterday at 8:27 PM
Tractors
Latest: Davey Crockett
Yesterday at 11:15 AM
8
Spring snows 24
Latest: 870XPRS
Thursday at 10:14 PM
R
Tract Optics
Latest: rodcontrol
Thursday at 2:22 PM
S
Israel
Latest: snow2
Thursday at 10:35 AM
Any Birders here?
Latest: svnmag
Wednesday at 8:59 PM
Prairie ghost
Latest: johnr
Wednesday at 4:20 PM
S
Mega Live
Latest: SLE
Wednesday at 2:12 PM
G
A good movie
Latest: gillraker
Wednesday at 9:53 AM
Skinwalker Ranch
Latest: svnmag
Tuesday at 10:16 PM
Friends of NDA
Forums
General
Vehicle Discussion
3.5 Ecoboost with 3.31 or 3.55 rear axle?
Top
Bottom