f550 4.88 gearing - Ford Powerstroke Diesel Forum
User Tag List

LinkBack Thread Tools Display Modes
post #1 of 2 Old 07-10-2012, 12:21 PM Thread Starter
Powerstroke.org Rookie
Join Date: Nov 2011
Location: lyons,oh
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
f550 4.88 gearing

ihi all, i have a 2004 ford f550 2wd with a pickup bed on it. I bought back in october.
i have a question about changing the gearing in the rear end, i have 4.88 in it right now, but would like to drop it to get a little better gas mileage, what would be everyones opinion? i don't haul alot except for my 23' enclosed trailer for my quads....i know big truck for little trailer, buy for the price i couldn't turn it down....it had 65,000 miles and paided only $20,000 for it.

It already has an egr delete kit(sinister diesel), edge evo ht tuner, two new batteries, 190 amp alternator,soon to have 5" turbo back exhaust, and AEM brute force air intake....
bigdogf550 is offline  
Sponsored Links
post #2 of 2 Old 07-10-2012, 05:14 PM
Premium Member
Arctic Fox's Avatar
Join Date: Mar 2010
Location: Stockbridge, Mi.
Posts: 768
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 3 Times in 3 Posts
Feedback Score: 7 reviews
I have 4.30 gears in my '06 F-450, it runs about 2100 rpm at 65 mph, that is about perfect for towing.

2006 F-450 XLT 4x4 Auto 4.30L Alcoa 19.5" 16,000 GVWR
Kelderman 4-Link/4-Bag Rear Suspension, Lariat Seats, '08 Console, '11 Mirrors, CTS, SCT X3
ARP's w/OEM HG, BPD 6ph FICM @ 58v, BPD Oil Cooler w/stat, Ported Intake, 185 amp Alt
P-Max w/WPE billet wheel, Spearco IC, 4" Banks Exhaust, Shell T6, Zerex EC-1, Oil bypass filter

47,000 miles
Arctic Fox is offline  
Sponsored Links

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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

For the best viewing experience please update your browser to Google Chrome