why a Ford 9"?

mopar340dave said

Gryzynx, the 9" has an extra bearing to support it because it NEEDS it! LOL


Your spline count info is incorrect. I know, I own an original 69 dart swinger 340 4speed car w/8.75" rear end. It came with 30 spline axles from the factory.
Here's a replacement axle, for example:
http://www.ringpinion.com/ProductDetails.aspx?ProdID=5639

Click to expand...

Yup, my bad.

The 29 splines is the yoke, not the axles. That's what I get for being up too early!

Still, the Ford wins here with 31 spline axles, but I doubt that extra spline would make or break the deal. The statement initially posted was that the 8 3/4 was much stronger than the 9". This, I'd have an issue with as both axles are extremely strong. I'd still give the edge to the Ford, but that does not mean I'm looking for one to put in my Cuda. Thanks to retsud_043, I'll have an 8.25 under my car this summer.