Code deciphering

[tink]

Hoping that ya'll can help. Purchased my 74 back in May 2010 and have been reading articles on this sight to point me in the right direction. I am having issues understanding the tags. The front axle tag shows 4 09 D4TA AFA 603471 7 rear is WEM-A3 3JB 11 9 6010. I have searched and found little info. From what I have found the front should be a D44 and the rear the Ford 9" but I am not sure if it is a locking diff or not. Please help

 

[Explorer]

Should be stock locker. To double check jack the rear off the ground and turn one wheel, the other should turn in the same direction.

 

[Viperwolf1]

WEM-A3 is a 3300 lb open diff rear axle with 4.11 gears. No limited slip in back means no limited slip in front either.

 

[Steve83]

You missed the 1st character on the 2nd line of the rear tag because it's under the bolt head. It's a 4, so 4.09 front & 4.11 rear - both open (from the factory). The only way to know for sure what's in there now is to open them up & look.

 

[1970mule]

mmmmmm stinky old diff oil, love that smell. stick with you for a while.

 

[tink]

Thank you. Probably my first of many questions