Changing 4.11 gear ratio to 3.73 - Ford Powerstroke Diesel Forum
Introductions This is the place that you introduce yourself

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 12-09-2007, 10:59 AM
Member
 

Join Date: Dec 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Changing 4.11 gear ratio to 3.73

Hello Everybody,
I am new to this and I am impressed by vast available information. I have 1999 F 350, 7.3 engine, dual tires, automatic transmission with 4.11 gear ratio. Until now, i was planning on changing the gear ratio to 3.73 by myself however given the complication and the special tools required, I don't think i will do it.
I live in Riverside CA and wondering if any of you know of a reputable differantial repair shop around here [not necessarily in Riverside, a shop as far as 150-200 miles away from Riverside is OK]

I thank you in advance,
Isa
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-09-2007, 11:09 AM
Powerstroke.org Sponsor

 

Join Date: Oct 2006
Location: Ventura County, CA
Posts: 20,359
Thanks: 23
Thanked 23 Times in 14 Posts
Feedback Score: 2 reviews
Send a message via AIM to Raul@Stealth Automotive
hey bud im here in the san fernando valley

i know of a place around here that does gears..... ill be doing mine early next year with them.... ill find the name and number and post it up
Reply With Quote Quick reply to this message
  #3  
Old 12-09-2007, 11:12 AM
Powerstroke.org Sponsor

 

Join Date: Oct 2006
Location: Ventura County, CA
Posts: 20,359
Thanks: 23
Thanked 23 Times in 14 Posts
Feedback Score: 2 reviews
Send a message via AIM to Raul@Stealth Automotive
here you go bud... they are called Hoopers...

Hooper's Rear End Exchange Inc.

12201 Branford St
Sun Valley, CA 91352

let me know if you have any other questions

-Raul
Reply With Quote Quick reply to this message
  #4  
Old 12-09-2007, 12:58 PM
Member
 

Join Date: Dec 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
hello Raul,
Thanks for the info, they are not that far from where I live, on Monday I will give them a call, and will go from there.
Thanks again for the help,
Isa
Reply With Quote Quick reply to this message
  #5  
Old 12-09-2007, 01:22 PM
Compression Ignition Addict
 

Join Date: Sep 2007
Location: Toms River, NJ
Posts: 3,720
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to 03f250stroke
Isa, I don't think you should change the gears..I think you should lift it and slammed some huge tires under there..take advantage of them 4.11s..I wish my truck had 4.11s..I wouldn't be thinking of changing my gears haha..Im just kidding with ya thou man..Hope it all works out good for you..oh and BTW Raul is hands down one of the nicest, coolest people on this forum that I have met. He really knows his stuff and will ALWAYS help you out.

-Evan
Reply With Quote Quick reply to this message
  #6  
Old 12-09-2007, 07:06 PM
Member
 

Join Date: Dec 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Evan, the lifting is not a bad idea, but i have a slide in camper that use whenever i go camping, so lifting i think would be little risky with the camper!! I am changing to 3.73 largely to save on the gas. I rarely pull something with my truck and only thing i haul is the camper--which is 3000 lbs- so i figured if i go with 3.73 or even 3.55 i would make more mileage per gallon. Currently, truck makes 60 miles at 2000 rpm and i read on some websites that they recommend Ford pst's go at 60 miles with as much as at 1400 rpm.
Of course, I just don't know how the engine/automatic transmission would handle when you force it to go with that low rpm.
Reply With Quote Quick reply to this message
  #7  
Old 12-10-2007, 02:14 PM
The Lady Mod


 

Join Date: Feb 2007
Location: Arkansas
Posts: 8,511
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to Granny
I hope you have been able to get the information you are seeking and welcome to the org!
Reply With Quote Quick reply to this message
  #8  
Old 12-10-2007, 02:20 PM
Banned
 

Join Date: Sep 2006
Location: Jarrettsville, MD
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Just for your information, 3.73 gears with 34" tall tires on my 06 runs just over 75 mph at 2000 rpm in overdrive. The 3.73 is a decent all around gear, but if you do a lot of stop and go driving it won't net you any better mpg. Also unless you run over 60 mph most of the time it won't do a whole lot better. They don't like being in O/D under 60 mph unless you have really flat ground.

Just a little food for thought. It will take several years worth of fuel savings to pay for the gear swap.
Reply With Quote Quick reply to this message
  #9  
Old 12-10-2007, 02:27 PM
BIG TRUCK, SMALL DRIVER
 

Join Date: Oct 2006
Location: Iva, SC
Posts: 5,877
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Welcome to the ORG.!
Reply With Quote Quick reply to this message
  #10  
Old 12-10-2007, 02:27 PM
Cynic
 

Join Date: Jun 2007
Location: Fort Worth, Texas
Posts: 11,194
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
I love my 3.73 gears. With 265/75r16 wheels, I am around 70MPH at 2000 RPMs. This weekend on my trip to Louisiana, I got 20-21MPG at that speed.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 12:46 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