Identification help needed

[throttle out]

Finally got around to look into my rear end and I need some help identifying my configuration.
Gears appear to be 3.73 but the carrier is somewhat elusive in the searching I've done. It appears to be an Eaton posi but thats the only info I've found that seams to jive.
Any help would be awesome
Thanks in advance!!

 

[87silveradok20]

you can count the teeth on the ring gear and the other gear, then divide them to get you ratio.

 

[Craig 85]

The numbers IFO the "GM" is the gear ratio "11 41" = 3.73. If it said "10-41" that would be 4.10.

 

[throttle out]

ratio is not in question but the carrier is.
Looks to be an Eaton Posi but not sure.

Thanks!!

 

[HotRodPC]

It does appear to be a Eaton Limited Slip Unit. Those gears are manufactured June of 1973. Is this a 12 bolt rear axle? An 87 should have a 10 bolt.

 

[bucket]

And the plot thickens! Yeah what rear axle is this? If it's a 10 bolt, the gears and carrier must be from a '73 Camaro or something?

 

[throttle out]

The axles are from an older rig, it is a 12 bolt. My apologies for the vagueness. I'm learning new details of my truck the further I go and I have been ALL up and through it lol! It's an 87 cab, box is probably 73 because someone has done a pile of **** bodywork on it, front clip is perfect though and aside from cab corner repairs the cab is to. I've got a disgusting amount of hours on the mechanicals of the truck however, and have done a pile of upgrading as well. It goes down the road rather well for a leaf sprung solid axle 4x4. The axles are the last bit to be gone through. then crossover steering!!

 

[HotRodPC]

And the plot thickens! Yeah what rear axle is this? If it's a 10 bolt, the gears and carrier must be from a '73 Camaro or something?

The axles are from an older rig, it is a 12 bolt. My apologies for the vagueness. I'm learning new details of my truck the further I go and I have been ALL up and through it lol! It's an 87 cab, box is probably 73 because someone has done a pile of **** bodywork on it, front clip is perfect though and aside from cab corner repairs the cab is to. I've got a disgusting amount of hours on the mechanicals of the truck however, and have done a pile of upgrading as well. It goes down the road rather well for a leaf sprung solid axle 4x4. The axles are the last bit to be gone through. then crossover steering!!

Well that explains that. I knew there was sumting wong with that picture.