I've been looking for a while now to put either a Detroit truetrac or an ARB full locker on the back of my truck. The issue stopping me to date has been the $$, costs between $650 and $1000. Just yesterday i thought I check out the local wrecking yard and found this. It looks like a factory either limited slip or locker and I found it on a 2004 GMS Sierra 2500HD. Now I've read tons about Dodge and GMC/Chev having the same 11.5 AAM but can anyone tell me what did I just purchase. Is it a limited slip, a locker type like the Detroit truetrac or something else? I paid $75, did I throw my money away?

JR

 

lets see a picture so we can tell what you got !!!

 

if it is the g80 it is a locker or at least in my 02 duramax it was

 

If it's a G80, it's not a real locker but it's better than a limited slip. It'll have clutches, but they'll lock up stronger because they aren't locked up all the time. They slip like an open differential until one side starts slipping, then the clutches apply to limit the slippage.

No idea if these will transfer easily from the GM 11.5 axle to the Dodge 11.5.
o

 

The pictures are in the 03-07 forum in a thread called 11.5 AAM differential. I made a mistake by posting here but couldn't delete the thread.
Thanks for all your input.
JR