9" vs 12 bolt

[slpws6ta]

Alright opinion time people moser 12 bolt vs moser Fbody 9"? which you perfer supported by fact if possible. durability, drivability, best fit any real fact based opinions would be appreciated. im afraid my 10 bolt isnt going to last long with the way im using it.
http://i159.photobucket.com/albums/t141/slpws6ta/wheelie3-1.jpg

[bills98ta]

I have the moser, but I figure which ever one you can get a great deal on ! They're both pretty much bullit proof !!!

[slpws6ta]

I have the moser, but I figure which ever one you can get a great deal on ! They're both pretty much bullit proof !!!

Moser makes both you have a moser 9" or 12 bolt?

[bills98ta]

Moser makes both you have a moser 9" or 12 bolt?

12 bolt, spool, 4.10 gear... Sure beats rebuilding the stock 7.5 rear all the time ! :yup:

[bills98ta]

What stall do you have ?

[slpws6ta]

LOL it only stalls if i dont rev it high enough before i come off the clutch! Lol it's a 6 speed and i'm running 26x11.5r17 mickey thompsons which is why i'm researching rear end upgrades!

[bills98ta]

:cheers: Pretty Good Launch then !!! I tried the six speed thing once... I'm better with the A-4 !!! LOL

[Rhinohuey]

General rule I believe is 9" for M6 and 12-bolt for A4. Can't tell you why but thats what Ive heard.

[zmg00camaross]

9 inch for m6 and gear changes are a snap

[slpws6ta]

:cheers: Pretty Good Launch then !!! I tried the six speed thing once... I'm better with the A-4 !!! LOL
thanks it actually pulls the left front a good 6 inches and the right front about 1-2 but the picture was a taken just a little late. that was sunday1/11/09 i made 6 passes and pulled the front 4 times friday night i went to an 1/8 mile track to work on my 60' and made 10 passes pulled the front 9 times and note a peep or growl or anything from the stock 85,000 mile 3.42 rear end, i love my car... i'd love it a little more if she'd run 10's lol

[slpws6ta]

General rule I believe is 9" for M6 and 12-bolt for A4. Can't tell you why but thats what Ive heard.
thanks i appreciate the info but without reason i may as well flip a coin.

[slpws6ta]

9 inch for m6 and gear changes are a snap
yea a quick gear change would be nice but center sections are damn expensive, however i think i'm leaning 9" but 12 bolts are pretty nasty too!

[bills98ta]

Once you get air ( under the tires ), you always want more !!! You must be getting a good 60' then. I average 1.39-1.41...

[slpws6ta]

my best is 1.8 but its untuned so it kind of falls on its face as soon as the tires come down. but your are right I WANT MORE!!!!!!

[bills98ta]

Has the rear went yet ?
Mine blew 4 times, before I upgraded... I went from a 3600 to a 4600 stall, didn't get one whole launch that time... Plus it took the tranny with it... :shitstorm:

[Bottesini]

General rule I believe is 9" for M6 and 12-bolt for A4. Can't tell you why but thats what Ive heard.

It is because the torque arm mount tends to flex the housing for the 12 bolts which leads to gear noise. Autos tend to be nicer to rears as well. Personally, I went with the 9" and love it. Not to mention I will not be worrying about it breaking anytime soon.

[shady milkman]

12 bolts have been known to break with modded m6s..more on the heavier side...the reason why 9"s are recommended for m6s are becuase they are built proof ..with their gear size..good contact patch..so you dont get deflection which causes gernading(10,and 12s)..also a4s preload the drivetrain before the launch..so its not such violent shock to the drivetrain(thats why 12s are perfect for a4s..very hard to break one) but for m6s..its no preload so drivetrain shock is exponentially higher then with a4s...so more flex and stress...go 9" even though i am an a4..i will be going midwest chasis fabbed 9" down the road..i like the set up and love the fact that i will probably never break that rear end unless i somehow get 2000hp/tq

[JwMonE99]

I want a rear to handle 600 or 700 hp with M6 I dont need builit proof.

[slpws6ta]

no therear hasnt broke yet... but i know its coming but my mind is made up
9" it is thanks for the input

[Jays00ss]

9" without a doubt

[INMY01TA]

For an M6 that will see alot of track time you can go 12 bolt with a spool. Very tuff, the posi is the week link in a 12 bolt. 9 inch with Detroit locker or spool is bullet proof also. Putting a posi in a 9 inch will make a weak link. I've heard mixed things about the True Trac.

[Mr. Luos]

9 inch for ANY car planning on launching hard.


Rarely hear of the 9" failing.
Heard of some horror stories about 12 bolt's giving out. Mostly on really high powered M6 cars though.

I prefer the way the torque arm mounts to the 9" as well.

[Hi-Po]

Wish I had a 9" instead of a 12 bolt really.

9" all the way.

Now, who here thinks a S60 is overkill???

[Mr. Luos]

9" > s60

[Jumper]

I would recommend a Fab 9'' from Midwest Chassis, they are light and come with a torque arm and LCA relocation brackets. If you plan on keeping the car, racing it some, and adding more power with future mods, you will have peace of mind with the rear.I will see if I can find some pics.

[shady milkman]

im going midwest when the times come too!

[Itllrun]

Fab 9" from midwest would basically make my a4 bulletproof right guys?

[INMY01TA]

Personally I think a 12 bolt does just fine for any A4.

[Hi-Po]

Personally I think a 12 bolt does just fine for any A4.
Agreed.

[9t8z28]

Wish I had a 9" instead of a 12 bolt really.

9" all the way.

Now, who here thinks a S60 is overkill???

What is wrong with your 12 bolt? I am guessing it's a Moser?

[9t8z28]

I am biased when it comes to Ford vs. Chevy but that is besides the point! Please no flaming. I know that 9.9 outta 10 will say go 9"

I have a Strange 12 bolt and it is a pretty stout piece. The c-clip eliminators actually make use of Ford set 20 bearings but that is about it. If the car is a street car and see's a fair amount of track time, I would go with the 12 bolt. You will have less drivetrain loss ((Strange even makes 12 bolt center sections for Ford rears for those who want the least DT loss)) and the #1 reason to get one is the fact that you can get them DIRT CHEAP. Repeat, DIRT CHEAP!

[camarojunky74]

I am biased when it comes to Ford vs. Chevy but that is besides the point! Please no flaming. I know that 9.9 outta 10 will say go 9"

I have a Strange 12 bolt and it is a pretty stout piece. The c-clip eliminators actually make use of Ford set 20 bearings but that is about it. If the car is a street car and see's a fair amount of track time, I would go with the 12 bolt. You will have less drivetrain loss ((Strange even makes 12 bolt center sections for Ford rears for those who want the least DT loss)) and the #1 reason to get one is the fact that you can get them DIRT CHEAP. Repeat, DIRT CHEAP!

i am in total agreeance with brandon, i just finished a 12 bolt install, it literally bolted right in, and cost 2100 brand new with 33 spline axles, c clip eliminators and has 3.73's but will soon be changed to 4.10's. strange is a very good company, i really think mods go thru "phases" like hairstyles for girls, moser imo was one of them, way overpriced and way to much drivetrain loss. get a 12 bolt, and be on your way with some money left for dinner. none of this top ramen shit while all your money goes to your car, im eating steak bitches.

just my .02c

[Itllrun]

:lol::lol::lol::lol::lol: I love it "I'm eating steak bitches" :lol::lol::lol::lol::lol:

[shady milkman]

:lol::lol::lol::lol::lol: I love it "I'm eating steak bitches" :lol::lol::lol::lol::lol:

x2 :lol:

[INMY01TA]

What rear do you have Shady? EDIT: Just saw your other post. Going Midwest.

[Hi-Po]

What is wrong with your 12 bolt? I am guessing it's a Moser?

Nothings really wrong with it, It is a DTS housing with moser axles and center section. It does whine slightly at about 55 mph. Im swaping the 3.73's out for 4.11 before summer. I guess my opinion was soley based on,

You have heard of people with M6 breaking 12 bolts. I dont think I have ever heard of a M6 breaking a 9". Im sure it has happened. Thats my only view on it.

[INMY01TA]

Nothings really wrong with it, It is a DTS housing with moser axles and center section. It does whine slightly at about 55 mph. Im swaping the 3.73's out for 4.11 before summer. I guess my opinion was soley based on,

You have heard of people with M6 breaking 12 bolts. I dont think I have ever heard of a M6 breaking a 9". Im sure it has happened. Thats my only view on it.Only heard of two guys breaking the 9'. One was Fireball and he abused that thing for years and years. Other was a guy on LS1 Tech and the housing broke on a brand new one. Just a freak thing. Usually M6 guys that break 12 bolts it is the Eaton posi that goes. If you don't mind runnin a spool I know several guys runnin spools in em that seriously beat on em at the track all year long.

[Snake Slayer]

I vote midwest fabed 9" also its what I run and it will never break and weighs the same as the 10 bolt.

[allbaugh_04]

I remember putting a rating on rear ends...i said something like:

So 9" is a A+ and the 12-bolt is a B+

Most agreed.

Aren't they about the same price anyways?

[9t8z28]

I remember putting a rating on rear ends...i said something like:

So 9" is a A+ and the 12-bolt is a B+

Most agreed.

Aren't they about the same price anyways?

New, yeah almost, but used the 12 is far cheaper

[9t8z28]

Nothings really wrong with it, It is a DTS housing with moser axles and center section. It does whine slightly at about 55 mph. Im swaping the 3.73's out for 4.11 before summer. I guess my opinion was soley based on,

You have heard of people with M6 breaking 12 bolts. I dont think I have ever heard of a M6 breaking a 9". Im sure it has happened. Thats my only view on it.

Well you are lucky enough to get a car with something better than a 10 bolt

[Itllrun]

look I'm stock may order headers and Y pipe if I get some help finding the cheapest 1 7/8 kooks header and y tonite how ever I plan On big cam and possible high spray with high stall I know its not a M6 but wouldn't I be better off with aN 9" From MOZER??????

[allbaugh_04]

New, yeah almost, but used the 12 is far cheaper

how much is a used 12-bolt?

[camarojunky74]

look I'm stock may order headers and Y pipe if I get some help finding the cheapest 1 7/8 kooks header and y tonite how ever I plan On big cam and possible high spray with high stall I know its not a M6 but wouldn't I be better off with aN 9" From MOZER??????

what are your goals, you listed your mods, you plan on 4 link? big tires? spraying off the line, tons of things to consider, but i really dont think a lot of people with big power that think they need a 9'' can even hook well enough to need that much gear, maybe its just me being pessimistic but i think alot of people over do things.

[9t8z28]

how much is a used 12-bolt?

Around 1K complete

[allbaugh_04]

very affordable imo...

can you get them the same width as a 10-bolt?

(for aftermarket wheel fitment issues)

[chuckie669]

Around 1K complete

where can you find a used moser? I've been keeping an eye on craigslist/ebay for awhile, but nothing around me.

[INMY01TA]

Used 12 bolts I see are typically $1,600.

[camarojunky74]

where can you find a used moser? I've been keeping an eye on craigslist/ebay for awhile, but nothing around me.

your in texas and cant track down a 12 bolt? lol keep searching im sure something will come up.

[chuckie669]

your in texas and cant track down a 12 bolt? lol keep searching im sure something will come up.

I apparently suck at searching.:hmm:

[camarojunky74]

here you go 500 more dollars and your set
http://dallas.craigslist.org/dal/pts/1054235149.html


email these guys see if they wanna part theres off, for yours + some cash
http://houston.craigslist.org/cto/1028676435.html

http://houston.craigslist.org/cto/1012431122.html

[shady milkman]

i am pretty sure that 12 bolt does not bolt in

[camarojunky74]

i am pretty sure that 12 bolt does not bolt in

no your right, may need to be shortened. a new carrier gears posi and yoke will deff be needed, but nothing crazy, and get the umi tq arm adapter

[zmg00camaross]

well danny miller rear gears makes a 9 inch houseing for f body which come with moser axle for $1000 and I build a 3rd member myself totally I spent $1500 on a bulletproof rearend build yourself and save some money

[camarojunky74]

great tip thanks. where did you get your 3rd member from?

[ebdboudreaux]

damn now you all have me re-debating between which 2 to get...

[shady milkman]

just be careful on the moser 12 bolts..they have been known to have the bolts back out of the torque arms..THIS IS JUST WITH THEIR 12 BOLTS

[zmg00camaross]

great tip thanks. where did you get your 3rd member from?

I found my 3rd member from a friend that said his neighbor cousin had the 3rd but I looked on eBay craigslist and raceingjunk and found a ton of them but the one I bought had 4.56 gears so I trying those out if I hate them the I just redo it with 4.10 but I wouldn't pay the $2500 I rather save a grand a do it myself

[camarojunky74]

just be careful on the moser 12 bolts..they have been known to have the bolts back out of the torque arms..THIS IS JUST WITH THEIR 12 BOLTS

loctite owns son

[shady milkman]

loctite owns son

they have still been known to walk out..even with loctite..something with the 4 bolts instead of 2 all the way through

[9t8z28]

they have still been known to walk out..even with loctite..something with the 4 bolts instead of 2 all the way through

Then you use the bolt with a hole through it. Wrap a wire around it and problem solved. I forget what you call it?

[shady milkman]

Then you use the bolt with a hole through it. Wrap a wire around it and problem solved. I forget what you call it?

hey man i am just passing along the info i have herd from alot of pissed off moser 12 bolt owners..also something with the size/beef of the bracket

[9t8z28]

hey man i am just passing along the info i have herd from alot of pissed off moser 12 bolt owners..also something with the size/beef of the bracket

Yes, that is a common complaint. They also have issues with the C-clip axles not sealing but thats not everyone.

I can verify that the Strange 12 bolt does not have these issues.

[allbaugh_04]

Then you use the bolt with a hole through it. Wrap a wire around it and problem solved. I forget what you call it?

Safety wiring....also you could use a pin i suppose.

The saftey wiring would solve that problem though. The pin would just hold it in place obviously.

[camarojunky74]

im finishing up a strange this afternoon, wow these things are pretty bad ass. big ford outter bearings, semi floating rear end, no c clips pretty bad ass rear end.

[LS2Tuner]

9" without a doubt

Jay is correct!:true:

9 inch is A LOT stronger and cheaper.

We have went over this in GREAT detail in the past.

http://www.ls1.com/forums/showthread.php?t=81185&highlight=inch+dana

[JwMonE99]

I have a 12 bolt, just havnt installed it yet, has 4.10 gears, and a detriot locker? btw I am an M6, how do you guys think it would hold up with 600hp on spray?

BTW only reason why I have the moser 12 is cause I picked it up for only $300

[LS2Tuner]

I have a 12 bolt, just havnt installed it yet, has 4.10 gears, and a detriot locker? btw I am an M6, how do you guys think it would hold up with 600hp on spray?

BTW only reason why I have the moser 12 is cause I picked it up for only $300

You should be just fine as long as you don't have used weak axles already.

[JwMonE99]

Well they are upgraded axels so who knows.

[9t8z28]

Well they are upgraded axels so who knows.

$300! Another steal! Nice find.

[shady milkman]

$300! Another steal! Nice find.

i know..:( i am waiting to find a deal like that!

[JwMonE99]

Well the guy is a good friend of mine.
Makes a pretty good bit, (Independent Contractor)
and he said yea man just take it, just give me $300 whenever and I can take my time with it.

[konigandy6]

Alright, I've made up my mind for a 9"

Where is the best place to order one from? I'm hoping online so I can fill out all the options I need.

TIA

[shady milkman]

Alright, I've made up my mind for a 9"

Where is the best place to order one from? I'm hoping online so I can fill out all the options I need.

TIA

exotic performance plus is a good one..or if you want ot spend a little more for a really REALLY good 9...go to midwest chassis

[konigandy6]

exotic performance plus is a good one..or if you want ot spend a little more for a really REALLY good 9...go to midwest chassis

Thanks Shady. I think either way I go, I will be looking right around $3k.

[01ws6er]

exotic performance plus is a good one..or if you want ot spend a little more for a really REALLY good 9...go to midwest chassis

Midwest has a VERY nice looking setup!!! Do they have the same fitment issues as moser does with their tq arm bracket.

[shady milkman]

Midwest has a VERY nice looking setup!!! Do they have the same fitment issues as moser does with their tq arm bracket.

nope they use the m9 casing i believe
not the standard 9"

[shady milkman]

and that is also for moser's 12 bolt..not the 9

[LS2Tuner]

Quick Performance on Ebay is your best choice for a 9inch.
Many other members have gotten rearends from them also. They will beat ANY price and quickest turnaround I have ever found.:true:

http://stores.ebay.com/Quick-Performance-Racing

[01ws6er]

Quick Performance on Ebay is your best choice for a 9inch.
Many other members have gotten rearends from them also. They will beat ANY price and quickest turnaround I have ever found.:true:

http://stores.ebay.com/Quick-Performance-Racing

People on Tech talk mad shit on QuickPerformance...but then again, it is Ls1Tech :lol:

[01ws6er]

nope they use the m9 casing i believe
not the standard 9"

They fab their own case.

and that is also for moser's 12 bolt..not the 9

I've read about others having issues with their tq arm hitting the floor with the M9 as well...

[Snake Slayer]

nope they use the m9 casing i believe
not the standard 9"

It is not the m9 casing it is their own design. Eric is the owner and the designer I have a midwest 9 in my ride. Best 9" out there and it is only a couple hundred more than a moser 9" plus it comes with its own chromoly TA.

[shady milkman]

hmm...i dont like the shorty torque arm design tho...but thats no biggy. 3k without 3rd member if i remember right

[INMY01TA]

Quick Performance on Ebay is your best choice for a 9inch.
Many other members have gotten rearends from them also. They will beat ANY price and quickest turnaround I have ever found.:true:

http://stores.ebay.com/Quick-Performance-RacingDo they sell one for a fourth gen with a TA mount? How about a direct link??????

[Snake Slayer]

hmm...i dont like the shorty torque arm design tho...but thats no biggy. 3k without 3rd member if i remember right

IF your talking Midwest Eric offers short or long TA's. His price is 2700 with the third member and it goes up from there.

[shady milkman]

IF your talking Midwest Eric offers short or long TA's. His price is 2700 with the third member and it goes up from there.

ahhh i misread..then..i thought it said third member was extra cost..but none the less..i have planned for a long time to go with mwc for my rear

[Snake Slayer]

you can't go wrong its almost a no brainer.....

[LS2Tuner]

People on Tech talk mad shit on QuickPerformance...but then again, it is Ls1Tech :lol:

I've put 6 or 7 in car's now with NO issues!!
I put BIG bottle on all my cars too. NO baby 150-175 here.
Never had a problem. I also make cars hook.
It's hard to even break stock 9" parts so not sure what shit they talk but I would and WILL CONTINUE TO BUY FROM THEM.

THEY HAVE 8,739 FEEDBACKS ON EBAY WITH 100% SO SOMEONE BETTER SET THE PIPE DOWN AND WALK AWAY!!
SORRY BUT IF THEY HAD ISSUES YOU WOULDN'T HAVE ALMOST 9,000 FEEDBACKS WITH 100%!!!:true:

[INMY01TA]

Do they sell one for a fourth gen with a TA mount? How about a direct link??????bump....

[LS2Tuner]

bump....

Call them (641) 751-8060:naughtywa

[konigandy6]

I've decided to go with the Exotic Peformance 9" with 4.11's and a Spohn trans mounted adjustable torque arm. I emailed Bob with a couple questions and had a response in about 1 hour. Great customer service so far and free shipping!!

Anyone have any gripes thus far with the 9" install. I don't fully understand the need for muffler clamps to relocate sway bar... anyone?

[shady milkman]

WILL CONTINUE TO BUY FROM THEM.

THEY HAVE 8,739 FEEDBACKS ON EBAY WITH 100% SO SOMEONE BETTER SET THE PIPE DOWN AND WALK AWAY!!
SORRY BUT IF THEY HAD ISSUES YOU WOULDN'T HAVE ALMOST 9,000 FEEDBACKS WITH 100%!!!:true:

caps locks is on

[Bottesini]

Anyone have any gripes thus far with the 9" install. I don't fully understand the need for muffler clamps to relocate sway bar... anyone?

Mine was fairly easy to install. The reason for the muffler clamps is that the axle tubes are larger for the 9". You will also have to figure out a way to adapt the stock mounts to work with the new clamps (or get a sway bar kit). The way that I made mine work was to cut open the stocker's hole and than use washers and aluminum shims to fill in the gaps.

[konigandy6]

Mine was fairly easy to install. The reason for the muffler clamps is that the axle tubes are larger for the 9". You will also have to figure out a way to adapt the stock mounts to work with the new clamps (or get a sway bar kit). The way that I made mine work was to cut open the stocker's hole and than use washers and aluminum shims to fill in the gaps.

Thanks for the feedback... I guess I'll find out when it's on the lift and the new axle is in place. If you dont mind me asking, what torque arm did you go with after the install?

[LS2Tuner]

caps locks is on

I know Shady. . . . . . . . . . :jerkit:

I just thought it was amusing.:coffee:

[driftpin]

Ok, so I bought a 9" rear 3.70.

I got a new Panhard bar, UMI SFC's, LCA's, Swaybar, and some Qa1 shocks.

Can you guys think of anything I might want to do while I have the rear end out?

[Jays00ss]

http://www.ls1.com/forums/showthread.php?t=108327


Quick Performance Racing is the only place to go

[Bottesini]

Ok, so I bought a 9" rear 3.70.

I got a new Panhard bar, UMI SFC's, LCA's, Swaybar, and some Qa1 shocks.

Can you guys think of anything I might want to do while I have the rear end out?

I went ahead and changed my fuel pump while I had the rear out. Was very easy to drop the tank since I have dumps and there was no rear end to avoid.

[LS2Tuner]

Ok, so I bought a 9" rear 3.70.

I got a new Panhard bar, UMI SFC's, LCA's, Swaybar, and some Qa1 shocks.

Can you guys think of anything I might want to do while I have the rear end out?

We usually weld up the brackets for the factory type control arms. As most are just stitch welded. It will add some rigidness to have them fully welded after welding in the SFC's.
Also I would add any sleeving for the fuel lines now while the cars up in the air.
http://www.thermotec.com/heat-sleeves.html

[shady milkman]

I know Shady. . . . . . . . . . :jerkit:

I just thought it was amusing.:coffee:

:lmao: