12 Bolt vs 10 Bolt Rear

[Dan Fahey]

Will a 10 Bolt live as well as a 12 Bolt in Stock?
What brand of gear works and survives better?

D

[Mark Yacavone]

Originally Posted by Dan Fahey

Will a 10 Bolt live as well as a 12 Bolt in Stock?
What brand of gear works and survives better?

D

Not enough information

[ss3011]

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 .

[Jim Kaekel]

A close friend of mine has a 10-bolt GM in an 8.50 E.T., BB Olds-powered bracket car and has had real good luck with it, although his car is very light, however, gear selection is VERY limited. After many years running it, he is currently switching over to a 9" Ford. With no pro gears and limited ratios available for the 10-bolt, that gives the advantage to the 12-bolt. Just my .02.

[Dan Fahey]

Currently using 4.56's, Moser Street Axles, Mini Spool, 28 inch MT

Have a Spool and C-Clip Eliminator kit not yet installed.

Considering 5.13's. with new Stocker cam

[MR DERBY CITY]

Dan, think of it this way....You will buy a 12 bolt sooner or later.....If you buy one sooner you can sell all your 10 bolt parts BEFORE they are destroyed.....Regards....

[Jeff Stout]

Originally Posted by MR DERBY CITY

Dan, think of it this way....You will buy a 12 bolt sooner or later.....If you buy one sooner you can sell all your 10 bolt parts BEFORE they are destroyed.....Regards....

This school of thought^^^

[Dan Fahey]

Originally Posted by Jeff Stout

This school of thought^^^

YEAH...that was also my thinking !!

Racers are living with them successful with more power than my car.

d

[Mark Yacavone]

If you're talking about the Impala SS, it'll cost you 3 Grand to put a 12 bolt in it, doing it yourself, and why?

[Chipper Chapman]

To my knowledge there are not any Bolt in 12 bolt options for the 77-96 b body platform. You would have to use an A or G body unit and make your own upper arms, as well as change the lower bracketed a bit. Now considering the only downside to the 8.5 is gears, as the bearings, axles and even pinion size are the same as a 12 bolt, I would buy a good quality gear set and run it. You can get gears all the way to 5.57, just not pro gears. That being said my 12 bolt in the chevelle has not had pro gears for the 5 years I’ve ran it and I’ve had no issues. Your results may vary of course.