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12 bolt should be good for a 9-10 second car, essentially the difference is size and amount of bolts to hold the ring gear to the carrier.
10 bolt= good auto X rear end, bad drag racing rear end due to too much ring gear play.
12 bolt= mass teh sex for drag racing. Most people put a 9in rear in their car because they want that super duper rear end, I will never see enough power to break my 12 bolt and it is an original gm product whereas the 9in was a ford design.
the reason why the 10bolt is weak is because of too much ring gear play?? do you even know what your talking about? ring gear play or "backlash" is set by the installer of the gears... not because of the type of rear end.... also wouldnt the issue of the 7.5 10 bolt be the fact that is a friggin 7.5 inch ring gear!!!!
the reason why the 10bolt is weak is because of too much ring gear play?? do you even know what your talking about? ring gear play or "backlash" is set by the installer of the gears... not because of the type of rear end.... also wouldnt the issue of the 7.5 10 bolt be the fact that is a friggin 7.5 inch ring gear!!!!





