HUGE DELEMA need advice ASAP - Ford Powerstroke Diesel Forum
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 01-04-2012, 12:17 PM
Powerstroke.org Fanatic
 

Join Date: Oct 2010
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
HUGE DELEMA need advice ASAP

i have an 05 6.0L F250 with a 4 inch exhast turbo back, aftermarket intake, SCT livewire 9600 programmer, 8 inch lift, and im running 40's. i am looking to re-gear the truck. the guy at the 4x4 store said he wouldnt re-gear the truck. im currently getting 9 mpg. i know if i re-gear the truck with 4;56 it would go pretty close back to stock as i could get. this is my daily driver. i know getting 15mpg is unrealistic. what gears should i run to help improve my MPG atleast back to 12 or 13. should i leave stock 3;73 or go 4;11 or 4;56..... please someone help. i would like to order gears in 2 days.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-04-2012, 12:34 PM
Compression Ignition Addict
 

Join Date: Jun 2009
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
What's your usage of the truck? City driving, highway? Mud running? Drag racing???


If you run 4.56's compared to 4.11's your going to have a weaker gear, but if your not going to be doing a lot of boosted launches, or in the mud going from no traction to lots of traction and such, you'll be fine with 4.56's, if you are going to be doing that, I'd go 4.11's....

But 4.56's will get your closer to stock, but the lower gear you go, the more top end you loose... With 4.56's and 40's I'd say 95 will be your fastest you can go...


Sent from my Autoguide iPhone app
Reply With Quote Quick reply to this message
  #3  
Old 01-04-2012, 02:37 PM
Powerstroke.org Fanatic
 

Join Date: Oct 2010
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
i do mostly city driving.. not to far on the highway. no towing no drag racing. very little mudding.
Reply With Quote Quick reply to this message
  #4  
Old 01-04-2012, 02:38 PM
Powerstroke.org Fanatic
 

Join Date: Oct 2010
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
also i dont plan on going 95 mph.. not in that truck!! lmao
Reply With Quote Quick reply to this message
  #5  
Old 01-04-2012, 05:42 PM
Premium Member
 

Join Date: Aug 2009
Location: Somewhere Between Good and Bad
Posts: 1,516
Thanks: 4
Thanked 22 Times in 22 Posts
Feedback Score: 0 reviews
With that size and weight of tire you really need 4.56s or even 5.13s. Your transmission will thank you, and your fuel mileage will recover a bit.
Reply With Quote Quick reply to this message
  #6  
Old 01-04-2012, 06:08 PM
Compression Ignition Addict
 

Join Date: Jun 2009
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
I would definitely do 4.56's, if your ballsy you can run 4.88's which you will love for your city driving, but that's gonna make your highway rpm's kinda high at 70-75... Idk what you normally cruise at... But I would definitely not go up to a 5.13.... It's just to weak of a gear.. Eventually something will give.


Sent from my Autoguide iPhone app
Reply With Quote Quick reply to this message
  #7  
Old 01-11-2012, 04:26 PM
Premium Member
 

Join Date: Jan 2012
Location: Fallon, Nv
Posts: 2,402
Thanks: 52
Thanked 9 Times in 8 Posts
Feedback Score: 0 reviews
Judging by the rate of change, to get the speedo to read right, you'll need a 4.73 gear. 40/31.5=1.26, then 1.26x3.73=4.73. So, if you are on road more, go 4.56, off road more, 4.88, 4.73 falls dead center between them.
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 02:20 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