im getting close to getting a stronger rear for my car, and now i really have to think of my choices. originally i was thinking 12 bolt but recently im leaning more toward the 9" im most likely going with moser. on a 9" can i retain my ABS (i do not have tcs)? My car is pretty much daily driven, all mods are in sig along with the power i make. I dont plan on doing to much performance stuff for a while besides a 90/90 setup after i finish my drivetrain stuff. The car will see the track, and if i get tired of the power an want more then im definitly gunna be sqweezing. So what you guys/gals think should i stick with a 12 bolt? or should i go with the bulletproof option the 9"? one last thing if i cannot retain my abs that will bring me back towards the 12 bolt, because im trying to maintain the somewhat easy driveabilty factor alive. Thanks guys

-Ryan

 

you wont be able to keep your abs.... but who needs it the 9 inch and 12 blot fight has been goin on forever and if your search there is tons of info on each. I just ordered my 9inch and i was in the same boat as you but i fig if i am goin to do it do it right the first time and i wont have to worry about breakin it..... and screw abs who needs it

 

You know the "12-bolt" has an 8.875" R.G. think about that for a minute.

Now haven't you seen some heavy *** A-body ie.. Chevelle or Buick GS/ GSX with the stock rear take a beating and live? I know I have.

I think with all these complaints the aftermarket housings must be suffering quality control problems.

If your breaking the diff.. well then, maybe you might just have a race car on you hands and you need a spool.
A properly set-up 12-bolt can handle a lot more than you think.

 

I just installed a Moser 9" from Driveline Solutions in my car and have been very happy with it. My car was already setup for 4 channel so I didn't have to worry about losing my ABS. I wasn't worried about losing a little more power with the 9" over the 12 bolt because I like knowing that I probably won't have to rebuild this 9" rear end for a while. The 9" is stronger than the 12 bolt and that's why I chose it. It seems like most of the problems with Moser 12 bolts is that they are not setup properly by the people at Moser. I believe the parts that Moser uses are good for the most part though. I'd recommend buying a Moser 12 bolt from Driveline Solutions. That way you can keep your ABS, and know that the 12 bolt was setup right.

 

If you had an A4 I'd say go with the 12 bolt. But with an M6 get the 9".

 

depends on if you ever want it to break.. a 9" with a locker and 33-35 spline axles.. and you'll never break it no matter what ya throw at it.. most likely atleast.. and i've heard many cases with 12 bolts starting to whine after a few hard launches.. i ehard they are just set up wrong from moser though..

I've heard of 12 bolts breaking more often than 9" rears too.. but the 12 bolt is lighter and you'll be quicker with less weight.. I wish i had a 12 bolt for weight reasons.. but the 9" i never have to worry about!
good luck!

 

We've installed many Moser 12 bolts and haven't had any big problems with them. I have a lot of runs on my Moser 12 bolt and I'm at 540 rwhp on my Mustang Chassis Dyno, which would be 40 to 50rwhp on a Dynojet dyno. I've come out anywhere from 4000 rpm all the way up to 6200 rpm while experimenting with my launches. Bob

 

Is that with a stick or auto?

 

Stick. Bob

 

I 2nd that.

 

9'' Will Hold More Power If You Want Something To Withstand Big Power On Launch I Would Say 9'' If You Dont Want To Make Over 600 Hp 12'' Is Not That Bad But Do It Once Do It Right

 

Yes you can keep it. It takes a little work on your part. I've posted about how to do it several times so i'm not going to take the time to do it again. A search will land you the info.

 

Lets just say... U answered it yourself. I know MANY guys run the 9" on the street but its drive-a-bility is far less efficent than the 12bolt. So I'd say go with the 12bolt... Thats what I am going to be doing... Goodluck and let us know what your going to go with!

 

Id say go with the 9in those gears are cake to change.

 

I got a Moser 9"'s lol 4.10's detroit and 35 spline axles kept both abs/ASR too. I think that was one of the better mods I have done to the car. Too bad I burnt my clutch up on the first and last run that I did in the states w/ that rear end. I still ran a 12.79@110 though compared to my stock set up that gave me 12.9-13.0's quite frequently. I dont think weight should never be an issue compared to durability. One thing for sure about the 9" is that I dont have enough money to even break that thing. I don't doubt 12's are strong but if the gears break in a 12bolt you will have to install new gears under the car or pull the whole rear out. I can just pull the 3rd out and work it on the bench.Which a 9 is easy *** hell to set up. BTW double check your set up from Moser I checked mine out and I needed to tweak some ****. Either way you will be fine. 10 bolts suck well late model 10 bolts do so a 12bolt or a 9 will definatly get you there and back. Oh with the 9 you can make home made spanner wrenches to set the gears cheap too.

 

damn guys thanks for all the help, im still on the fence on what to do...but ill figure it out...also the only rear company i know of is moser, strange and currie. what are some other ones? what is best? i noticed every1 saying that the moser stuff comes somewhat faulty and takes some tweaking to fix, how big of a problem is that? what is wrong from them? thanks guys/gals
-Ryan

 

Moser, Strange and Currie to a lesser extent, are the main ones in the F-body world. There is one more than can make you just about $$$ anything $$$ you want and it doesn't have to be in their catalog.

markwilliams.com

 

9" all the way

I ran a 9" with a spool every day on the street in my camaro.

 

I've run my Moser 12 bolt 33 spline TrueTrac with 3.73's 30 some odd times this year and haven't noticed ANY increased gear noise or any gear noise for that matter. Sticky tires with a full bolt on car and a cam launching at 5500-6500 RPM. If there were going to be any problems at my level they would have surfaced by now.

 

Lack of giving a **** or quality control whatever you want to call it. Is probably what is wrong with Moser. Maybe the demand to too high for them so they slap **** together. Even if the parts came from someone else I would go ahead and check it first. Since its out of the car it would be easier and give you that piece of mind.