axle code question

Reply Subscribe

Thread Tools

Search this Thread

Oct 5, 2007 | 10:20 PM

jfoster5150

Thread Starter

New User

Joined: Dec 2003

Posts: 13

Likes: 0

axle code question

Rearend went out in my 83 f250 found 2 different axles one is coded C7 on the door but cant find the ratio anywhere and the other one is C9 which I think is 3.55 limited slip but its out of a mid 90s 93 -97 crew cab will it fit with no major headaches? Im wanting the C9 if the ratio is what Ive found on the web(my axle is currently 31 floating rear ) the C7 is not a floating rear(hubs not extended out past rims) any thoughts on this would be appreciated..

Oct 5, 2007 | 11:13 PM

PLC7.3

Post Fiend

Joined: Nov 2004

Posts: 5,638

Likes: 1

From: Manitoba

https://www.ford-trucks.com/article/...de_Chart_.html

http://www.drivetrain.com/Fordtrkratio_posidata.html

Oct 6, 2007 | 05:09 AM

jfoster5150

Thread Starter

New User

Joined: Dec 2003

Posts: 13

Likes: 0

Already found those and no C7 code listed on either.

Oct 6, 2007 | 10:56 AM

PLC7.3

Post Fiend

Joined: Nov 2004

Posts: 5,638

Likes: 1

From: Manitoba

Check out this page it may be of value....... you say 31 floating rear????

http://www.hemmings.com/mus/stories/...feature11.html

Oct 6, 2007 | 11:00 AM

jfoster5150

Thread Starter

New User

Joined: Dec 2003

Posts: 13

Likes: 0

Yea the rearend I have in there now is a dana full floating code on the door is 31.... 373 gears

Oct 6, 2007 | 01:05 PM

jfoster5150

Thread Starter

New User

Joined: Dec 2003

Posts: 13

Likes: 0

Latest update Im not going to be able to get the C9 coded axle so can anyone tell me what is the ratio on a C7 coded axle or am I miss reading the number