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while at the drags I noticed many cars use the ford 9" rear, GM, FORD , a lot of others also, even the IMPORT guys use it, where would drag racing be if ford back in 1957 had NOT decided to make a stronger rear axle assembly, its a pretty old unit by design, I see today custom fabbed units but copying the basic designs, just thinking it must have been ahead of its time for 1957. so much for trivia . RON
 

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They'd be using Dana's. Dana's are definately stronger, but a helluva lot heavier, and sucks up even more power than the 9" does. I think even the 12 bolt isn't a bad unit, asctually it's pretty damn strong, just not up to the weight that most "10 sec street cars" are. I love my 9" too!~!
 

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12 bolts are great, just like Tim said, not really up to the mega hp cars, or stick shift cars with grabby clutches. The Dana is very strong and also quite a bit more expesive than a 9"

The great thing about the 9" is that there are dozens upon dozens of gear sets available, center sections, housings, etc. etc. Its like small block chevy parts interchangeability.
 

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I love how you can just bolt in a new chunk... Very easy for non-gear guys like me :)
 
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