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12 Bolt keeps breaking- NEED HELP

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Old 03-01-2008, 01:17 PM
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Default 12 Bolt keeps breaking- NEED HELP

What Rear End do i need for a six speed car? I currently have a 12 bolt but now have broke the spider gears twice in it in the last 4 months....I need something that will hold to a 6000 Rpm Launch with nitrous? Car makes about 550 and proabably close to 650 on the torque side...Please help
Old 03-01-2008, 01:18 PM
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It isn't the rear end so much as it is your choice of a posi. You should be looking at a locker or a spool doing what you are doing.
Old 03-01-2008, 01:20 PM
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Ok what is the best choice? Im not really worried about drivabillity issues at all
Old 03-01-2008, 01:25 PM
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Spool if you don't care about driveability.
Old 03-01-2008, 03:34 PM
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With that power and a six speed, you need a 9" rear or D60. No wonder you are busting **** up.
Old 03-01-2008, 03:39 PM
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Originally Posted by wrd1972
With that power and a six speed, you need a 9" rear or D60. No wonder you are busting **** up.
Bullshit. Read his post. He keeps breaking the posi, and that would happen even if he was running a posi in the 9" or D60.
Old 03-01-2008, 03:40 PM
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i have a 33 spline true trac forsale.
Old 03-01-2008, 04:38 PM
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A spool will fix your issues. It will also test the rest of the rear.
Old 03-01-2008, 05:07 PM
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Originally Posted by MeentSS02
Bullshit. Read his post. He keeps breaking the posi, and that would happen even if he was running a posi in the 9" or D60.
Uh, I read it many times. 6K RPM nitrous clutch dumps and making 650 RWTQ.

I will try again.
With that power and a six speed, you need a 9" rear or D60. No wonder you are busting **** up.

The 12 bolt is on the ragged edge of continuous breakage here and it would be foolish to throw good money on bad money considering the overall situation.
Old 03-01-2008, 05:08 PM
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Originally Posted by wrd1972
Uh, I read it many times. 6K RPM nitrous clutch dumps and making 650 RWTQ.

I will try again.
With that power and a six speed, you need a 9" rear or D60. No wonder you are busting **** up.
And what exactly are you basing this on? What Bob @ EPP spouts off? Horseshit.
Old 03-01-2008, 07:18 PM
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Originally Posted by MeentSS02
And what exactly are you basing this on? What Bob @ EPP spouts off? Horseshit.
My magic 8-ball says so.
Old 03-01-2008, 07:45 PM
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I would say a spool is needed and a set of progears if your not currently running them. Street gears are a little harder and will be the next week point if you go to a spool.
Old 03-01-2008, 08:04 PM
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Are you saying you have 6" pistons, wow one hell of an overbore, and choking it down with a 52mm throttle bodie? anyway there are lots of single digit race cars running a 12bolt, making more power and torque. once he disasembles the rear and insp everything and build it for what he wants it wont flinch. and also a 9" also needs a back brace too make it stronger so the axle tubes wont flex and break them.
Old 03-02-2008, 12:42 PM
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Yeah well when i got home that night from the track i opened up the rear to see what happened and on all the teeth off one of the spider gears is all gone....What is wierd is i have never seen fluid as mattalic silver as this....As soon as i popped the rear at the track i shut the car off and maybe pushed it a total of 50 yards so im thinking that i might have had a problem that existed before i arrived to the track...Last time out to the track it was holding up fine to a 1.5 sixty on motor i just guess that 13 PSI in a 10.5 slick and 125 shot out of the hole was too much.....You gotta pay to play lol
Old 03-03-2008, 12:43 AM
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tru trac FTW!




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