How can I know the rear axle ratio of my F-150? - Ford F150 Forum - Community of Ford Truck Fans

Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > 1997 - 2003 Ford F150
Log In 

How can I know the rear axle ratio of my F-150?

Thread Tools Search this Thread
Old 02-18-2008, 05:58 PM   #1
Junior Member
Join Date: Feb 2008
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Default How can I know the rear axle ratio of my F-150?

Hi Everybody!

I need to know the rear axle ratio of my truck, in order to calculate the load my vehicle can carry/tow.

Thank u for your help
Rusel is offline   Reply With Quote
Join F150 Forum

Join Today - It's Totally Free!

Are you a Ford F150 fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford F150 Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your truck, and have a great time with other Ford F150 fans. Whether your an old timer or just bought your F150 you'll find that is a great community to join. Best of all it's totally free!

Join Today! - Click Here JOIN FOR FREE

Old 02-18-2008, 06:08 PM   #2
Resident A-hole
5 Year Member
NGM's Avatar
Join Date: Feb 2007
Location: Tallahassee
Posts: 4,098
Thanks: 0
Thanked 25 Times in 20 Posts
Send a message via Yahoo to NGM

There should be a tag on the back of the axle it will have numbers like 9 75 3l 55 or 8.8 3l 55 or 8.8 3l 75. It might not have the " L " in the middle. The 9.75 or 8.8 is the ring gear size and the second set of numbers is the ratio. If yours is missing the tag you can count how many times the drive shaft turns compared to 1 turn of the rear tire. 3 and 1/2 turns is a 3.55 3 and 3/4 turns of the driveshaft is a 3.73 and 4 and 1/10 turns is a 4.10 or 4.11.
SCT Tuner - 400.00
Jaws Racing Tunes - 150.00
Beating the wifes new GM truck - Priceless
NGM is offline   Reply With Quote
Old 02-18-2008, 06:11 PM   #3
No Pain, No Pain!
5 Year Member
dewman's Avatar
Join Date: Jul 2007
Location: Baltimore, Maryland
Posts: 4,825
Thanked 6 Times in 5 Posts

Or, you can check the sticker inside your driver's side door, find the axle code and look here:
1996 F150 Scab longbed, 5.8L, 4x4, 31x10.5 tires, 212k miles and counting. step bars, low-profile tool box, Euro-clear turn signals & headlights, Euro taillights, vent visors, class III Reese hitch, Tekonsha brake controller.

"when you have a hammer in your hand, everything looks like a nail."
dewman is offline   Reply With Quote
The Following 2 Users Say Thank You to dewman For This Useful Post:
CrossCountryPreacher (05-03-2014), NASTYXLT (02-29-2016)
Old 02-18-2008, 07:02 PM   #4
Senior Member
5 Year Member
Ty's Avatar
Join Date: Nov 2006
Location: Minocqua Wi
Posts: 6,988
Thanks: 0
Thanked 5 Times in 5 Posts

The door sticker is the easiest, and you can find out all kinds of other stuff from it.
Ty is offline   Reply With Quote
The Following User Says Thank You to Ty For This Useful Post:
NASTYXLT (02-29-2016)
Old 02-22-2008, 07:58 PM   #5
ASE Master Tech
TRITON7700's Avatar
Join Date: Feb 2008
Location: Chaumont NY
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts

Your Owners Manual Will Tell You As Well. Rear Axle Ratio Doesn't Matter Weight. It's Not What You Can Pull Anyway. It's Rated On What You Can Safely Stop.... Your Truck Is Probably Rated To Tow Round 6000 Pounds. Look At Your Door Sticker For Gvwr That Is What You Can Carry. Weight Of The Truck Is Included Though So You Have To Factor That In.
TRITON7700 is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Texas: 2012 F150 FX4 Ecoboost - Loaded OptimiStick 2009 - 2014 Truck Sales 5 04-11-2016 02:43 PM
Replaced front fuel pump; still not working spinningchurro 1987 - 1996 F150 6 10-23-2015 10:01 PM
need some axle help please dixiemudder04 2004 - 2008 Ford F150 3 09-09-2015 09:07 AM
Hey everyone Brandyn193 Introductions 1 09-04-2015 04:06 PM
Windows Jason Spelts Aftermarket Products, Reviews & Installation 3 09-03-2015 10:07 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 04:51 AM.

Copyright 2006 - 20011
This site is in no way affiliated with the Ford Motor Company.