91 axle code question

[Iowa 73]

I'll check my factory service manual when I get back in town tonight.

 

[Sealboy_04]

i cant find anything om the internet about that 39N. it wierd

 

[Iowa 73]

I have the '91 factory service manual and there is no reference to N under axle code. The third digit listed is only "2", which would be front axle limited slip.

 

[FORDF250HDXLT]

thats very strange to see the N placed on the door jam sticker after axle code.
probably someones mistake printing it is all.
you know what the actual rear end is,so i wouldn't worry about it lol.
post every single letter and number on the axle tag if ya want,but im guessing it'll just be the run of the mill popular sterling srw pickup 3.55 open diff anyway.
it appears as if you have a rare printing error.kinda cool.