i just pulled the axle tags from my truck and after some searching i didnt come up with much clearification. so if anyone can help me decode these would be greatly apreaciated.
p.s. also have another front axle going in the truck so i am trying to make sure i have the info so i can put it in and to see if i need to change the gear ratio. these tags are from a 90 F-250 4x4

the tags are as follows

Front: 4.09 upside down triangle E8TAUCV 610311-2

Front axle to be put in: 4.10 upside down triangle E8TA YC 610312-2

Rear: V131C 10 10 2 0C15

 

Check the code on the door jab, loooks to be 410 in front,which is pretty obvious. I have the code book that came with my truck,if u post the code

 

Rear axle will be the sterling 10.25 either full or semi float
front look at your hubs. if they are 3" across, its a Dana 44HD. if theyre 4" across, its a D50

 

V131C = F-250/350 PU '87-'96 4.10, 10.25 ring gear, limited slip.