F350 rear axel project

[rcsmith]

I am converting a F350 rear axel and long body frame to a Farm Water Buffalo trailer. (front end was totaled)
The differential tag has the ID: L10 102 7E29 . Above that S132N , Which means a 4.10 ratio and 10.25 Diameter Gear Ring. Am I right?
I have figured out the upper series means Sterling Model 132 revision N.
The main ID means Limited Slip (L) and the 7E29 is the Year Month and Day of assembly.
Now the middle number are not as clear to me. 10 102 ? does that men 10:10 gear ratio and a Ring Gear size of 2? Which kind of matches the Model
information.
From what I have been able to find the AGW is 9K. is that right?
Any help with these numbers and correcting me if I have read them wrong would be appreciated.