Difference Rear axles Mustang II

Rockinkees

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Mar 28, 2018
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Hi there,
I want to know if there is any difference between the rear axles of the Mustang II 4-cil, 6cil and V8.
Besides the gear ratio that is.
I’ve thought I’ve read somewhere, the 4 and 6 cilinders has an 8” ring gear and the V8 an 6 1/4” ring gear?? But I can’t find this anymore.
you would say an 8” is stronger than a 6 1/4” right?

How much horsepower will the different axles take?
I ask this because we are looking for an axle of about 57” Width. Mustang II has that width.
It going to be in a 1935 Ford with a small block, the Stock axle won’t take the power of a small block.
so, I want to know the difference between the axles, I’m in Holland, lots of axles but not V8 axles...

thanks!
 
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429MII

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V8 is always the 8", v6 can be either, 4 is the 6 3/4"
The Mustang II 8" rear end would handle the power without any problem (easily). The 4 and some 6 banger diff not so much. Some V6 cars had 8" but can't guarantee that info. Best to check when looking at them as they are easy to tell apart.
I think the 4 and most 6 diffs are 6 3/4 ring gear. The 6 3/4 rear has a bolt on cover looking from the back, the 8" does not.
 
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Rockinkees

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Okay, so I had a small bit right....
So, it’s neccesary to get a V8 axle then, or V6 with the 8” ringgear?
Our goal is around the 300 hp mark, that’s possible with these axles?
 
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Rockinkees

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Mar 28, 2018
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We had contact with Addie, he hasn’t got any V8 axles.
Don’t know about the 6cil with the 8”. Probably have to look for our selfs.

we need a complete axle, a revision is not a problem as long as it’s complete.
 

74stang2togo

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You should be able to find a 2.8 or 3.0 Capri in Holland.

In the US, most guys that V8 swap a Capri, including myself, keep the stock Capri axle, as it's pretty much equal to the 8" in durability. (It's also similar in width).
 
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