Is there such a thing as...

[Waverous]

...a big bearing full width 28 spline axle? My recent purchase from Pull N Save is a ful width 9" from under an early 70's F100. I measured the bolts on the back of the backing plate and it appeared to be a big bearing rear end. Took it apart and the bearings appear to be big bearing as well, but the shafts are 28 spline. The axle shafts taper down to the splines

 

[michael084]

I have 2 off some early 70s 2wd.

 

[Waverous]

So, are you saying the housing that I have (the one that had the 28 spline axles) may be a big bearing housing

 

[SaddleUp]

I don't think they started putting 31 spline axles in them until 73. They put a lot of 28 spline axles in big bearing EB's so I don't see any reason they would not have used 28 spline axles in pickups as well.

 

[kyle]

It's fairly common to see a 28 spline big bearing in early 70's pick-ups.

 

[SaddleUp]

Here are a couple of sites that have quite a bit of information that will help identify exactly what you have. Apparently they used both 28 and 31 spline axles clear back in the late 50's.

http://www.maliburacing.com/ford_9_inch/ford_nine_inch.htm

http://www.bchra.org/TipsTricks/WhyAFordRearEnd.htm

 

[Socal Tom]

That's what I have in mine, it's a good setup, you get the 11x 2.25 rear drums, and the rear axles are both the same length so you only have to carry one spare. If you don't tell anyone they probably won't notice that it's not an EB rear end.
Tom