[hford]

Anyone know how to interpret the Ford codes on the above mentioned center section? Mainly interested in the limited slip or locker code. Seem some have an "L" in the ration number (3 L 07)
and others don't. I've also seem some that have the ratio number with no "L", then 88, and then another set of numbers that I've been told holds a key to what it is. What gives?
Thanks,
Hurley