BE axle Posi unit...
 

Is there a correct part number for the posi unit on BE axles? I have read somewhere that the unit was machined different, different guts, and such...What posi unit is correct for a BE... https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: BE axle Posi unit...
 

The BE rear end had special part numbers for the ring and pinion set, but they all used an Eaton 4 Series Posi carrier. The part number cast into the end of the unit is EDB 30174.

Re: BE axle Posi unit...
 

The guts were completely different. The side gears were unique and the spider gears were bigger in size like the non posi spider gears. I had one rebuilt years ago and the rearend guy said in the 20 plus years he had been doing them he had only seen one other. Somewhere I have pics of the gears.

Re: BE axle Posi unit...
 

The posi carrier in a "BE" rear is actually a #234 and is different then the standard #174 4-series carrier.

Re: BE axle Posi unit...
 

Not that I'm any great expert, but I was quoting Ed Cunneen's book, page 85, where he states "This 4.10 positraction axle consisted of a special service Eaton positraction case (ED8-30174)including heavy duty springs, spider gears and plates..."
If GM used other carriers, where would I find the information?

Re: BE axle Posi unit...
 

ANDY M
To answer your question.Pick up a copy of "Chevrolet Special Equipment" catalog.
This is filed with Hi-po parts Chevrolet sold then & now over the counter.I have one here dated 3-9-72.It shows a 4:10 Posi Ring & Pinion Part#3917971 for all Chevy cars.
Carrier#3918837 replaced #3916234.

Re: BE axle Posi unit...
 

The Spring plates and springs were also COPO specific and different than a standerd 4 series. Just like Clill said. https://www.yenko.net/ubbthreads/imag...arleySucks.gif

Re: BE axle Posi unit...
 

OK, I guess I have the correct unit. Are these date coded anywhere? And, Do I understand that these may have been available over the counter??? Im trying to determine that this unit actually came out of my axle I have.... https://www.yenko.net/ubbthreads/ima...lins/beers.gif

Re: BE axle Posi unit...
 

Interior shot of the plates and springs... https://www.yenko.net/ubbthreads/ima...lins/beers.gif

Re: BE axle Posi unit...
 

Is it to be known that anybody remakes these gears or are available new? Or even Old Stock, new? https://www.yenko.net/ubbthreads/imag...lins/beers.gif