Posi rebuild

[wh1-Denver]

I am looking to rebuild the posi in my car.
I ordered the clutch pack from gmpartsdirect.com but they emailed me back asking what type of spring is in it and what posi it is. Here is the email they sent:

"Unfortunately the springs do not come with the clutch discs, I have
checked the VIN and it shows two types of limited slip or clutch type
differentials for that year. The EATON has two coil type springs and
the corporation has one s type spring. I believe you have the Eaton
differential can you please check to make sure it's the Eaton. I wish I
could add the parts to your order but our credit card verification
system will not allow us to place or change orders for you, so when I
find your part number you will have to order the part. Early years it's
difficult verifying parts with GM catalogs so sorry for so many
e-mails!!"

Can anyone help me out here?
Thanks

 

[wh1-Denver]

TTT

 

[Red Regal T]

Mike, did you take the rear cover off? I guess the Eaton has these little coil springs you can see in the openings of the chunk. Eaton posi doesn't have clutch discs? Factory 8.5 unit has a Z shaped spring in the middle, uses clutch discs, and has no little coil springs. Did that help?

 

[dsa87gn]

this might help...

I'm looking into the same thing come springtime..

I found this number searching through gnttype.org:

s-spring #231260

HTH