BE Axel...supposedly for sale on eBay

[Kurt S]

The casting year is probably is a 9 if the axle is original. Real hard to tell cast 6's, 8's, and 9's apart, esp on axles.......

[camarojoe]

I agree its sometimes hard to tell 6's from 8's from 9's on castings, but it sure looks like an 8 and not a 9 to me.

[Casey Marks]

[Sarcasm] Maybe they used different casting numerals for COPO rear ends. [/Sarcasm]

[Chevy454]

Hey Case...here's some rear info per COPO.com..any chance you could do some digging on your end?

<font color="blue">SPECIAL EATON POSI CASE "234"

The 1969 COPO Camaros, Chevelles and the 1970 Copo Novas had a special heavy duty Eaton posi case, which differed
significantly from the 4-series production case.

The parts are listed below:

3916234 Complete assembly
3918834 Spring Plate - heat treated
3957939 Spring 75lb. each (natural color)
3880140 Spider Gear (larger size)
3918831 Side (Axle) gear (16 teeth)
</font>

[Casey Marks]

Yep !

What would be REALLY great is if someone could post some pics of each of the above components. My contention is that some (if not all) of that stuff is available still thru Eaton. They don't widely market or publicize the component pieces-parts ..... but they got 'em.

And ...... I'd prefer to be correct on at least "some" of my assumptions so that you guys can get the parts you need. I'd love to help out.

[Jeff Murphy]

[69L72RS]

I have a series of pictures of the parts your are asking about, but still don't have editing software to shrink them to a postable size. If someone else can shrink them and post them , I will email them.
I will try to post the data base info that I have from the road this weekend. I have an archive of about 15 "BE" rears that I have worked on over the past 18 years. It has casting date/assembly date/and posi date correlation info.
I tried to have this done sooner but have been too busy at work.
Hope this info will clear up some of the previous questions from other post too.

Eric

[Casey Marks]

GREAT info Eric ! Thanks.

The more data the better. We'll see what we can come up with.

The part that REALLY sux is that Eaton is in the process of moving ALL of the differential business out of Marshall, MI. and Hastings, NE. It's all going to Mexico. Once it goes to Mexico, the ability to tap into 35+ years of posi "stuff" decreases significantly.