Quote:
Originally Posted by AG
Was that a stock 9" or aftermarket with a Daytona pinion support?
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Both.
The 9” that broke at the strip was an aftermarket case and Daytona pinion support, with a 550HP SBC in a Chevy S10.
The photo was a stock grey iron case behind a 455 Pontiac. After it broke you could see the pinion had been flexing were it broke, had been cracked for awhile, and there was not much holding it together anymore.
Stock the 9” were not strong at all. Even the sought after factory 9” N cases did not have enough pinion support, they broke often also. I have broke a stock grey iron 9” case with a inline 6 300 Ford in front of it. It broke the back support off, then split the case open, on top of that it then sheared the posi carrier in two. Kind of eye opening on stock stuff.