broke my mosher 12-bolt
10-28-2003, 02:47 PM
#1
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Broke my Moser 12 Bolt it only had about 10-12 hard launches on it, 1.52-1.56 60' times.
all's I heard was a pop and grinding when I was launching at about 6k rpms.
it's apart and the gears are destroyed. I've only got 443/435 rwhp/tq
anyone else have one come apart this fast????
my freak'n 10 bolt with 3.42's took more abuse
all's I heard was a pop and grinding when I was launching at about 6k rpms.
it's apart and the gears are destroyed. I've only got 443/435 rwhp/tq
anyone else have one come apart this fast????
my freak'n 10 bolt with 3.42's took more abuse
*
10-29-2003, 03:27 AM
#4
Launching at 6k rpm is pretty brutal on any rear end. I heard of one guy that broke a 9 inch rear launching just below his rev limiter, I think around 6,600 rpm. And that was a stronger rear than a 12 bolt. Keep in mind it's not just the HP, but all of the kinetic energy stored in the flyweel and engine that you are just droping into the rear all at once.
10-29-2003, 05:55 AM
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i broke my 12 bolt on its last rebuilt with about 7 runs on it. broke a tooth clean off the ring.
broke it 4 times total for different things. 12bolt=junk
moser 9 inch=win!
broke it 4 times total for different things. 12bolt=junk
moser 9 inch=win!
10-29-2003, 12:42 PM
#7
guys remember 383ss had a full spool in his moser 12 bolt. and no way in hell should he be able to break it. the car is around 3450 lbs raceweight or so and he only pulls mid to low 1.5s and only had a handfull of them to boot. makes me sick when i see a friend or anyone spend that kind of money to only break that fast.
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10-29-2003, 02:28 PM
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Got the car here up on the rack...looks like the carrier bearings took a dump! Once those went loose the ring is wobbling around not staying tight against the pinion anymore.
10-29-2003, 04:03 PM
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Originally Posted by Smoke_ur_5.0
Got the car here up on the rack...looks like the carrier bearings took a dump! Once those went loose the ring is wobbling around not staying tight against the pinion anymore.
thats what happened to mine the 2nd rebuild. the axles were moving around and causeing metal shavings to get into the rear. just made alot of noise, but i didnt race it much like that.
10-29-2003, 04:57 PM
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Damn that is scary. I launched my H/C m6 car at 6000+ rpms, and had no problems with my 9''. Looks like I'll be putting another one up under the car instead of a 12 bolt when the time comes.
10-29-2003, 05:45 PM
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hmmm, maybe I should have went with a 9" instead... oh well, I kinda needed a gear change anyway.
still not happy about it since it it allowed Mark (smkur50) to beat me into the tens.
:p lol
ya, I forgot to mention it was a spool
still not happy about it since it it allowed Mark (smkur50) to beat me into the tens.
:p lolya, I forgot to mention it was a spool
Last edited by 383ss; 11-01-2003 at 07:02 PM.
10-29-2003, 07:23 PM
#12
you know that sounds JUST like my story when i had 4.56 gears and i broke on the 3rd launch of its life. except my pinion bearing went loose and ofcourse the pinion dropped down under tq and destroyed my ring and pinion. too much of a coincidence for me.
10-30-2003, 07:33 AM
#13
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You got to be shitting me.
I just did my entire rear over with the Moser spool, 33 splin,all new berings,new gears,new yoke's. If it goes I will be soooo Pissed. Is moser going to do anything?
The axles are warrentied 33 splins are, But is anything ealse?
If this happens to me and Moser doesnt fix it, I will do some very stupid things.
I just did my entire rear over with the Moser spool, 33 splin,all new berings,new gears,new yoke's. If it goes I will be soooo Pissed. Is moser going to do anything?
The axles are warrentied 33 splins are, But is anything ealse?
If this happens to me and Moser doesnt fix it, I will do some very stupid things.
10-31-2003, 01:15 AM
#14
Originally Posted by Smoke_ur_5.0
Got the car here up on the rack...looks like the carrier bearings took a dump! Once those went loose the ring is wobbling around not staying tight against the pinion anymore.
To add a little to this, when I pulled mine (moser 12 bolt) apart the carrier bearings were WAY, WAY, WAY to loose!!!!!!!!!!!!! There was no preload on them what so ever. I called Moser about it and they acted like I was speaking in tongues. The guy on the phone MUST have had down syndrome or something. Maybe just full on retardation. Whatever his mental ailment, the guy didn't seem to understand "preload" and "carrier bearings." He totally blew off any chance it was their fault. So I'm to believe that these are either "relaxing" after a while (since they are new castings) and the bearings are getting loose, or Moser isn't taking the proper time to set them up. Either way I'd be for checking them out soon after some breakin miles or a few good launches to see if things are what they should be.
Chris
10-31-2003, 12:59 PM
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Moser's quality control when it comes to initial install sucks ***. I'm surprised more people don't have problems from fully setup Moser's from the factory.
Last edited by verbs; 11-02-2003 at 12:19 AM.
10-31-2003, 02:51 PM
#19
Originally Posted by verbs
Moser's quality control when it comes to initial install sucks ***. I'm surprised more people don't have problems from fully setup Moser's from the factory.
Agreed!!!
It's not a Ford vs. Chevy issue here. I don't for one second believe the 9" is stronger. But they are easier to setup the gears on. A monkey can set carrier preload on the 9" with a simple spanner wrench. It's more of a pain on the 12 bolts. It takes trying and try again until it's right. You have to know that Moser isn't likely paying some highly skilled engineer a 6 figure annual salary to set up these on a daily basis. There's probably some old "dirt lip" throwing these together for $10 an hour. Can't expect quality at that rate. It cost $70 an hour to get a sorry dealership to work on a car. And that $70 an hour gets a half a$$ mechanic part of the time.
Chris
j/k sounds like everyone (well atleast the ks/mo guys here) have something in common.