9" Ford Or GM 12 bolt!!
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From: Chicago IL.
9" Ford Or GM 12 bolt!! 9" Ford Or GM 12 bolt. Which would you say is better. It'll be for daily street driving and as a weekend track car with about 500 horsepower coming out the rear wheels.
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From: IL
Re: 9" Ford Or GM 12 bolt!! At first, I heard that NOTHING....I mean, NOTHING could break a 9"...Heck, there are 9 sec. Ford's that are still using a "beefed up" 8.8" and haven't upgraded to the 9". However, I've actually heard of a few people bustin' 9"ers. Maybe it was just a small case of build quality, maybe not.
Both have their downsides.
I'm sure others could elaborate moreso then I could.
Both have their downsides.
I'm sure others could elaborate moreso then I could.
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From: Chi-Town, IL
Re: 9" Ford Or GM 12 bolt!! I have also heard that 12 bolts can be broken...when I do upgrade rears I will be going with a 9"
Izzo is doing a deal on rears $2500 installed for a 12 bolt. Not sure about the 9" though
Izzo is doing a deal on rears $2500 installed for a 12 bolt. Not sure about the 9" though
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From: IL
Re: 9" Ford Or GM 12 bolt!! 12-Bolt: Not quite as strong as a 9".
9-Inch: Heavy, More power loss then a 12-bolt, fitment issues (on occasion) and hey...it's FORD!
Bos, you may need a 9" moreso then an automatic car would simply because your M6 will put more "shock" thru the rear...
I dunno, I'll let the experts do the talkin.
9-Inch: Heavy, More power loss then a 12-bolt, fitment issues (on occasion) and hey...it's FORD!
Bos, you may need a 9" moreso then an automatic car would simply because your M6 will put more "shock" thru the rear...
I dunno, I'll let the experts do the talkin.
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From: Las Vegas
Re: 9" Ford Or GM 12 bolt!! Nine-inch rear with 4.11's and currently 425rwhp/400rwtq with an M6 launching at 5000.
I think I can actually hear it asking me "is that all i got".
Problem is that my Sucky Star clutch is done and I am now on final 10-day countdown to my A4 conversion.
[ November 30, 2001: Message edited by: SSValet ]</p>
I think I can actually hear it asking me "is that all i got".
Problem is that my Sucky Star clutch is done and I am now on final 10-day countdown to my A4 conversion.
[ November 30, 2001: Message edited by: SSValet ]</p>
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From: Tullahoma TN
Re: 9" Ford Or GM 12 bolt!! [quote]Originally posted by 2001WhiteZ28:
<strong>I have an A4 so do you think i should just go with the 12 Bolt for Weight purposes or do you think i'm going to break it.</strong><hr></blockquote>
Get the 12-bolt. You are not going to break it with your meager hp output. The 12-bolt is much better for a daily driver. Shoot Colonel an email, he will tell you why he got rid of his 9" Ford for a 12-bolt rear on his 9 sec. camaro. There are plently of folks running 9 sec. cars on 12 bolts. The aftermarket 12 bolts have stronger cases than the factory ones ever did and a Moroso Brute Strength posi will survive anything you can throw at it.
<strong>I have an A4 so do you think i should just go with the 12 Bolt for Weight purposes or do you think i'm going to break it.</strong><hr></blockquote>
Get the 12-bolt. You are not going to break it with your meager hp output. The 12-bolt is much better for a daily driver. Shoot Colonel an email, he will tell you why he got rid of his 9" Ford for a 12-bolt rear on his 9 sec. camaro. There are plently of folks running 9 sec. cars on 12 bolts. The aftermarket 12 bolts have stronger cases than the factory ones ever did and a Moroso Brute Strength posi will survive anything you can throw at it.
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From: Las Vegas
Re: 9" Ford Or GM 12 bolt!! Stage 3 w/ carbon disk and aluminium flywheel.
The disk is fine, it's the yellow painted,pseudo GM pressure plate that blows.
The conversion is the Yank 4L70 w/ PYE 4000 and some other little goodies.
I've been hogtied with my clutch issues for so long now I'm starting to think my car redlines at 4000.
The disk is fine, it's the yellow painted,pseudo GM pressure plate that blows.
The conversion is the Yank 4L70 w/ PYE 4000 and some other little goodies.
I've been hogtied with my clutch issues for so long now I'm starting to think my car redlines at 4000.
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From: Monroe, SD
Re: 9" Ford Or GM 12 bolt!! oh the 9" is bad *** i love it <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" /> it rocks it makes the back end of the car sit up alittle higher than everyone elses <img src="images/icons/grin.gif" border="0"> and just remember "gotta pack much back" <img src="images/icons/grin.gif" border="0"> and mine was an expensive learning experiance let me tell you 3200 <img src="images/icons/shocked.gif" border="0">
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From: College Station, Tx
Re: 9" Ford Or GM 12 bolt!! On 12 bolts most of the issues I have seen have actually been with the axles or posi's - not sure why.
On 9" it's the centersection. If you go with a cast one you may or may not break it (I did, silverpig99 did) - if you go with a nodular and a billet pinion support then you start to get in the indestructable (at our power level) area.
If the price is similar, go 12 bolt - 9"'s tend to give you problems related to pinion angle and driveline vibration. It can be solved and they can work, no question - it is just a bit mroe work.
As for diff though, I would never consider any posi "indestructable" I have seen even brand new HD posi's that refuse to spin both tires properly in a burnout. Give me a locker anyday <img src="images/icons/smile.gif" border="0">
Chris
On 9" it's the centersection. If you go with a cast one you may or may not break it (I did, silverpig99 did) - if you go with a nodular and a billet pinion support then you start to get in the indestructable (at our power level) area.
If the price is similar, go 12 bolt - 9"'s tend to give you problems related to pinion angle and driveline vibration. It can be solved and they can work, no question - it is just a bit mroe work.
As for diff though, I would never consider any posi "indestructable" I have seen even brand new HD posi's that refuse to spin both tires properly in a burnout. Give me a locker anyday <img src="images/icons/smile.gif" border="0">
Chris
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From: Huntington NY
Re: 9" Ford Or GM 12 bolt!! If anyone is looking to get rid of a T56 please email me. I was always interested in having a 6 speed. I dont get to the track to often and the car is pretty much stock, that would be pretty nice. Thanks