I've looked at the rear end for the typical tag on the bolt, but I see no such thing... however, there is a barcode sticker on the axle housing with a few numbers on it... could those numbers indicate which gear ratio I got? If so, how do I find out? I see the following numbers:

666AG
(P)52104

There is nothing on my window sticker regarding gear ratio, but I do have the 11.5" rear end with the anti-spin diff...

Any info would be greatly appreciated, thanks!

 

Look inside the glove box. There will be a sticker inside there telling all.

 

Thanks! I just went out to find it... 3.73 afterall...

 

I think if it dosent say anything on the window sticker it is the 3.73. The 4.10 is an option and will say so.