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ss3011 · 04-20-2018, 07:12 AM

A "built" 8.5" 10 bolt will handle quite a lot , and I think Truman Fields Firebird stick car even ran an early 8.2" 10 bolt . Most of the breakage would occur on the side gears and pinions in the differential . Since most racers run a spool and aftermarket axles , both of these axles will live OK . A 12 bolt will out live them both , and has better ratio coverage .

04-20-2018, 07:12 AM	#3
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: 12 Bolt vs 10 Bolt Rear A "built" 8.5" 10 bolt will handle quite a lot , and I think Truman Fields Firebird stick car even ran an early 8.2" 10 bolt . Most of the breakage would occur on the side gears and pinions in the differential . Since most racers run a spool and aftermarket axles , both of these axles will live OK . A 12 bolt will out live them both , and has better ratio coverage .