So yeah. What the thread title says.

Also, I have a 2004 F150 4.6L STX 4x4.

 

Veihicle Certification sticker in the driver's side door jamb has the code on it.

 

There is a code on the drivers door tag for axle. Some one will jump in and post what those codes mean or you can do a search on the subject. Or, you can jack up the vehicle and see how many times the drive shaft rotates to one time of the wheel.


there is probably a tag attached to your rear end housing that has it as well.

 

Yea..there is a tag on the diff that says it.

 

Partial list of axle codes:

non-limited slip

27 – 3:31
19 – 3:55
26 – 3:73
25 – 4:10

limited slip

H9 – 3:55
B6 – 3:73
B5 – 4:10