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10 bolt, 12 bolt, 9 inch

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Old 05-17-2008, 07:53 AM
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Yea 40-50 Lbs sounds about right, depending on which differential you got and rear end cover. Ive had my 12 bolt for 2 years now with plenty of abuse and no problems what so ever
Old 05-17-2008, 10:19 AM
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Originally Posted by 71-Camaro-98
What exactly is the difference between the 10 bolt, 12 bolt and 9 inch rear ends?? Are there any exterior differences so that you can tell which is which w/o opening them up?
Don't believe the hype about the 10bolts being weak.

Many people, stock and some mods, have well over 100,000 hard driven miles on their stock 10-bolts with zero problems.

The discussion has happened many times on here. Also, fyi, mine is a hard driven m6 with 101k miles on it.

The guys that break 10 bolts are the guys that put drag radials or slicks on them with high hp, and launch at high rpm.

Also, running a larger rear will actually cost you performance and power due to the extra power it takes to spin the heavier parts. Think about a fly wheel in a kids toy car. That little light car, think of how hard it is to push it forward relative to the light weight of the toy, because you are spinning up a weight, which takes a lot more energy than just moving the same weight a direction without spinning it also. I hope that made sense to readers.
Old 05-17-2008, 10:25 AM
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Originally Posted by EvoWake
well.. simply put, the difference of greatest significance is the actual size of the ring and pinion gears... in a 12 bolt, a 9", or a dana, the gears are much larger, (and therefore can withstand greater stresses) than the stock 10 bolt
Also, from what I understand, where the pinion rides on the ring gear, which is why the ford 9" is so much stronger than the ford 8.8", the 8.8 lines up like O--- where the 9" lines up lik O___. probably more to it than that, but just trying to give as much info as possible.
Old 05-17-2008, 11:35 AM
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my ten bolt has held up for 100k and works great. on the day it bites it, i will prolly go the 12 bolt route bc i will never own slicks. at least not for this car.
Old 05-17-2008, 02:17 PM
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Only 2500 bucks. Wow I was always under the impression it was like twice as much. Also what is about the limit a 12 bolt can hold horse power wise. Like Horse Power+Slicks=? Where will the 12B brake?
Old 05-18-2008, 11:15 PM
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12 bolt dumdumdum
Old 05-27-2008, 06:35 PM
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Originally Posted by Shooter_Jay
Don't believe the hype about the 10bolts being weak.

Many people, stock and some mods, have well over 100,000 hard driven miles on their stock 10-bolts with zero problems.

The discussion has happened many times on here. Also, fyi, mine is a hard driven m6 with 101k miles on it.

The guys that break 10 bolts are the guys that put drag radials or slicks on them with high hp, and launch at high rpm.

Also, running a larger rear will actually cost you performance and power due to the extra power it takes to spin the heavier parts. Think about a fly wheel in a kids toy car. That little light car, think of how hard it is to push it forward relative to the light weight of the toy, because you are spinning up a weight, which takes a lot more energy than just moving the same weight a direction without spinning it also. I hope that made sense to readers.
Im sorry but i have to diasagree the 10bolt is very weak and i broke mine on drag radials with a less than agressive launch when i had almost stock power! I think it is a waste of money to try to build a 10 bolt when you know it is gonna break again especially if you want to drag the car in a manual. I know plenty of people that have rebuild theres more than once and they spent a fortune just to break again and again with less than 400 to the rear on drag radials. My brother broke his on and auto on street tires with his only mod being a lid!! All you have to do is hit the search button on here to see the carnage that people have had with the stock 10 bolts. Just my .02
Old 05-27-2008, 06:37 PM
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Originally Posted by araber89
Only 2500 bucks. Wow I was always under the impression it was like twice as much. Also what is about the limit a 12 bolt can hold horse power wise. Like Horse Power+Slicks=? Where will the 12B brake?
Rule of thumb 12bolt=auto 9in/dana60= m6 cars . Just from what i have read and personally i love my 9in fromt driveline solutions.
Old 05-27-2008, 06:45 PM
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Originally Posted by Shooter_Jay
Don't believe the hype about the 10bolts being weak.

Many people, stock and some mods, have well over 100,000 hard driven miles on their stock 10-bolts with zero problems.

The discussion has happened many times on here. Also, fyi, mine is a hard driven m6 with 101k miles on it.

The guys that break 10 bolts are the guys that put drag radials or slicks on them with high hp, and launch at high rpm.

Also, running a larger rear will actually cost you performance and power due to the extra power it takes to spin the heavier parts. Think about a fly wheel in a kids toy car. That little light car, think of how hard it is to push it forward relative to the light weight of the toy, because you are spinning up a weight, which takes a lot more energy than just moving the same weight a direction without spinning it also. I hope that made sense to readers.
Really??? Cause mine broke during daily driving. Just got in the car one day, and bam!!! Hopefully your 10 bolt lasts you a long time, but don't tell me they are strong cause.... they ain't!
Old 05-27-2008, 07:19 PM
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Well, if I am not mistaken mine is still the stock 10 Bolt and I am going on 108k and I haven't noticed any problems yet... Hope it stays that way.
Old 05-29-2008, 05:54 AM
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Originally Posted by 71-Camaro-98
Well, if I am not mistaken mine is still the stock 10 Bolt and I am going on 108k and I haven't noticed any problems yet... Hope it stays that way.
Im guessing you dont take yours to the track much. There isnt a time limit on when they brake but if you drive your car hard and do it enough it will break.
Old 05-29-2008, 03:20 PM
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2500 bucks? lol, I paid half that. I got a moser 9" housing with axles for a thousand bucks, and a center section for 250 that included 4.11 gears and a spool all set up. I spent 1300 bucks. Its not too noisy either, but then I couldnt hear very well over the open headers and the neighbors bitching.
Old 05-29-2008, 03:32 PM
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To the OP, do you plan on getting a new rear end, or just intrested in learning about them.
If you plan on buying one...
Everyone missed the biggest question
What kind of power do you want to be making at the rear wheels?

Originally Posted by 2001z
Rule of thumb 12bolt=auto 9in/dana60= m6 cars . Just from what i have read and personally i love my 9in fromt driveline solutions.
Not true, if he has an auto and plans to be making 1000rwhp w/ sticky tires i would never throw a 12-bolt on the car, thats more of 9" and D60 territory.
Old 05-29-2008, 03:41 PM
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Originally Posted by Gordon0652
To the OP, do you plan on getting a new rear end, or just intrested in learning about them.
If you plan on buying one...
Everyone missed the biggest question
What kind of power do you want to be making at the rear wheels?


It was more out of curiosity and wanting to learn the difference between them.. I do plan on getting a new rear end at some point. I just dont know when. As for which one I would pick, I think I would just go with the 9". I am wanting around 400rwhp so I think that would do me fine...

What exactly is the difference between having a lower spline count vs a higher spline count??
Old 05-29-2008, 10:12 PM
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Originally Posted by 71-Camaro-98
It was more out of curiosity and wanting to learn the difference between them.. I do plan on getting a new rear end at some point. I just dont know when. As for which one I would pick, I think I would just go with the 9". I am wanting around 400rwhp so I think that would do me fine...

What exactly is the difference between having a lower spline count vs a higher spline count??

You say 400rwhp but that will get old after a while and you will want more.
Goodluck.
Old 05-29-2008, 10:23 PM
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Originally Posted by Gordon0652
You say 400rwhp but that will get old after a while and you will want more.
Goodluck.
Thats why my 71 will have over 600rwhp
Old 05-30-2008, 10:01 AM
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Originally Posted by 71-Camaro-98
What exactly is the difference between having a lower spline count vs a higher spline count??

More splines = more strength



Quick Reply: 10 bolt, 12 bolt, 9 inch



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