Which rear end? - Ford Powerstroke Diesel Forum
General 6.7 Discussion General 6.7 Discussion

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-29-2010, 06:14 AM
Premium Member
 

Join Date: Jan 2010
Location: South Texas
Posts: 1,117
Thanks: 1
Thanked 10 Times in 9 Posts
Feedback Score: 0 reviews
Which rear end?

Who on here has the 3.55 rear and vs the 3.31? How do you guys like it? What kind of mileage differences are you guys seeing. Post up your rear end and your mileage please. I'd like to see which ones are better. They are both rated to tow the same I believe. Thanks guys.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-29-2010, 07:42 AM
Member
 

Join Date: Apr 2008
Location: Katy TX
Posts: 66
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I've got a 350 and I have the 3.55 e-locker. Had to get it to get the 20" wheel option. Just went from Atlanta, GA to Bend Or and from Bend, OR to Pittsburgh PA. I got anywhere from a low of 12 MPG to a high of 17.6 MPG on this trip and I was mostly running 80 MPH. The worst was going through Wyoming, Utah, Idaho and Oregon. I guess due to air temperature and winter blend fuel. I was not towing anything. Only real difference was on the way back I had 300 pounds in sand bags on the rear axles in the bed of the truck for traction. My *** end was all over the place in Wyoming on the way to OR with the winter storm that had moved through. Not that 300 pounds is that much but it helped a lot on the snow and ice I went through on my way to Pittsburgh PA. Current odometer reading sits at just over 19,000 miles.
Reply With Quote Quick reply to this message
  #3  
Old 11-29-2010, 08:07 AM
Compression Ignition Addict
 

Join Date: Nov 2009
Location: Steel City
Posts: 386
Thanks: 1
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
^ that is a lottttttttttttt of driving
Reply With Quote Quick reply to this message
  #4  
Old 11-29-2010, 08:54 AM
Powerstroke.org Rookie
 

Join Date: Oct 2010
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by mor4wd View Post
Who on here has the 3.55 rear and vs the 3.31? How do you guys like it? What kind of mileage differences are you guys seeing. Post up your rear end and your mileage please. I'd like to see which ones are better. They are both rated to tow the same I believe. Thanks guys.
=====================================

I own a F250 CC SB with a 3.31 rear end 4550 miles on her and get 18-19 Lite Town driving, 20-22 at 65-70 and 24 MPG on the highway at 55.. I just got back from Houston for the Holidays and got 20 going over with head winds and 22 coming home all at 70 MPH... Love my Diesel just wish I had gotten the long bed and the 37 gallon fuel tank..... Hope this helps!
Don
Reply With Quote Quick reply to this message
  #5  
Old 11-29-2010, 09:24 AM
Member
 

Join Date: Apr 2008
Location: Katy TX
Posts: 66
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Quote:
Originally Posted by PUMPED 101 View Post
^ that is a lottttttttttttt of driving
Yep. I leave the Pittsburgh area on Thursday headed to Houston Texas, in Houston till the following Thursday headed to Atlanta, GA to pick up my daughter and the over to Grenada MS for a family reunion. I haven't been in one place longer than 7 days since the middle of October.
Reply With Quote Quick reply to this message
  #6  
Old 11-29-2010, 10:13 AM
Compression Ignition Addict
 

Join Date: Mar 2009
Posts: 407
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I'm curious if you order the 3.31 with 18's and then swap out the 18's for 20's if you would get any significant improvment in mpg. Unless you're towing at the limit, I don't see how the 3.31 with the 20's would really impair the towing capability but could help with the mpg's. Thoughts?
Reply With Quote Quick reply to this message
  #7  
Old 11-29-2010, 12:07 PM
Premium Member
 

Join Date: Jan 2010
Location: South Texas
Posts: 1,117
Thanks: 1
Thanked 10 Times in 9 Posts
Feedback Score: 0 reviews
The stock tire size on the 18s is about 33" tall and the 20's is about 34" tall. I'd imagine you'd see some gains.
Reply With Quote Quick reply to this message
  #8  
Old 11-29-2010, 03:20 PM
Compression Ignition Addict
 

Join Date: Feb 2010
Posts: 181
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Can you get the e-locker with the 3.31 rear end?
Reply With Quote Quick reply to this message
  #9  
Old 11-29-2010, 09:38 PM
Premium Member
 

Join Date: Jan 2010
Location: South Texas
Posts: 1,117
Thanks: 1
Thanked 10 Times in 9 Posts
Feedback Score: 0 reviews
Yes you can get the locker with the 3.31. I went with the 3.55 locker after hearing you guys and talking to the dealer about it. I do some towing and the 3.55 seemed right.
Reply With Quote Quick reply to this message
  #10  
Old 11-30-2010, 09:57 AM
Member
 

Join Date: Jun 2010
Location: Beaumont, TX
Posts: 63
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Yep. I leave the Pittsburgh area on Thursday headed to Houston Texas, in Houston till the following Thursday headed to Atlanta, GA to pick up my daughter and the over to Grenada MS for a family reunion. I haven't been in one place longer than 7 days since the middle of October.
I thought I did a lot of driving but it's nothing compared to this. Good thing about our area around Houston is that it is flat so you should see some good fuel mileage. Give a good loud honk when you pass through Beaumont for me.

BTW, if you have problems near Grenada, MS the Ford dealer there has a really good service department. I was going to Illinois on a hunt when my 6.0 took a dump. We left it in their hands and continued on our trip and the service guy communicated to me by text so not to interrupt my hunts. They had me over a barrel but they did a great job without unnecessary cost.

Last edited by jflow730; 11-30-2010 at 03:47 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 07:25 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors