I searched, I really did.

I took the salesman's word for it, (that I had a 3.73), wondering where to find the axel codes? Thanks in advance.

 

They are all over the fourm. Post your axle code and I could tell yah. B6 is 3.73 LS I think.

 

There is a tag on the driver's door jamb. One of the codes listed is the axle code. Look in this thread for the list. The thread is in our How To section.

https://www.f150online.com/forums/ar...e-sticker.html

 

Thanks for the replies... However that link doesn't list my code, which is "L6" under "Axle" in the door jam. Unless of course I'm blind, which is possible. After more looking, I found " E373 9.75" which is pretty obvious I guess?

Thanks again for the replies.

 

Yes, L6 is the 3.73 locker.

Here is another helpful thread in addition the one suggested earlier:

http://www.f150forum.com/f38/rear-diff-48933/