Gear ratio
Elder User
Joined: Mar 2005
Posts: 878
Likes: 0
From: Cornelius, Oregon
I assume you're talking about the axle ratios, the easiest way is to look on the differential and see if there is a tag on it. Otherwise, you can jack up the rear end, put it in neutral and spin the driveshaft once and count how many revolutions the tires do. That will get you close. Finally, you can go inside the differential and count the number of teeth on the ring gear and the pinion gear and that will give you the exact ratio.
Post Fiend
Joined: Mar 2003
Posts: 14,413
Likes: 3
From: Sarnia, Ontario, CANADA!
Hi and welcome to FTE! Be sure to read this to help you around this site: https://www.ford-trucks.com/forums/s...88#post3272088 There are also State, Provincial and International Chapters located near the bottom of the main forum page.
We are glad to have you. Hope you enjoy the site. Check out the various forums. Lots of great info for you.
Thread moved to 73-79 Ford trucks forum.
See ya on the boards!
-Matt
We are glad to have you. Hope you enjoy the site. Check out the various forums. Lots of great info for you.
Thread moved to 73-79 Ford trucks forum.
See ya on the boards!
-Matt
Posting Guru
Joined: Nov 2005
Posts: 1,113
Likes: 0
From: the side of a mountain
the tag would be on the bolts holding the third member in on the rear i have mainly seen them on the passenger side, and tag on the front would be on a bolt holding the cover on. you may have to dig through grease to find it. on the bottom row on the far left there will be numbers like 3 50 or 3L50 the 3 50 is 3.50:1 with an open carrier and the 3L50 is 3.50:1 with a track loc limited slip carrier.
Postmaster
Joined: Jul 2003
Posts: 2,544
Likes: 2
From: okc
get all the numbers off your door tag and go here.........
http://www.medicine.wisc.edu/~mrm/bronco/ftvin.cgi
if your truck is original equipment it will tell you alot about it.....but i cant remember if it gives the axle ratio.....you can also go to Fords website (forddotcom) and find the contact us link, then send them an email with your vehicles info (VIN etc) and your mailing address, and ask for a copy of the build sheet....they will send you one free of charge in a couple weeks...i have them for both of my trucks and they have alot of interesting info on them...
http://www.medicine.wisc.edu/~mrm/bronco/ftvin.cgi
if your truck is original equipment it will tell you alot about it.....but i cant remember if it gives the axle ratio.....you can also go to Fords website (forddotcom) and find the contact us link, then send them an email with your vehicles info (VIN etc) and your mailing address, and ask for a copy of the build sheet....they will send you one free of charge in a couple weeks...i have them for both of my trucks and they have alot of interesting info on them...
