Gears & Axles - Is your aftermarket rear-end as quiet as a brand-new 10-bolt?

I have a daily-driven 2002 Z28 with the A4 and I will eventually replace my factory 10-bolt. My goal is to eventually run consistent 11's and have between 450-475 rwhp to do so. After using the search button and reading a lot of the threads here, not one person ever said that their aftermarket rear-end was actually quiet. (When I say quiet, I mean quiet as a the factory 10-bolt on a brand-new f-body!!!) Right now, I'm leaning towards a Strange 12-bolt since they come already fully assembled and have excellent torque arm provisions. What are my chances of having a quiet rear-end? What aftermarket rear-end is the quietest? Thanks in advance for the info.

how quiet the rear is doesnt really depend on which brand you get. its who set up the gears and how thorough they were. when you get the 12 bolt or whatever you decide on you should bring it in to a reputable gear/rear end shop and have the pattern looked over just to double check.

^^ I agree

how quiet the rear is doesnt really depend on which brand you get. its who set up the gears and how thorough they were. when you get the 12 bolt or whatever you decide on you should bring it in to a reputable gear/rear end shop and have the pattern looked over just to double check.

+1 :judge:

I know people that have build junkyard 9"s that are whisper quiet, and I know other people with Strange rears that howl. It depends on the cut of the gears and how well it's set up. I will tell you that set to the exact same tolerances in my Moser 12-bolt 3.90's were much louder than my 4.11's.

there should be a choice in this pole that reads "i still have my 10bolt and is loud as shit"

rite now my 10-boltw/3.23 is quiet that will prob change when i get my 4.11s :jest:

Actually my 9 inch going down the road is not whiny or anything, but it is a clunky SOB around the corners and stuff from what I've heard its just a tradeoff by having the tru trac rather than a standard posi....

my 10 bolt with 4.10's is a whiny bitch. Will get an s60 this summer.

rite now my 10-boltw/3.23 is quiet that will prob change when i get my 4.11s :jest:

ya got that right

My 3.90's are dead quiet. Windows up, radio off, no noise at all.


Now after a few hard launches that might change.

mine is quieter than the 10 bolt, but my 10 bolt absolutely screamed. The 12 bolt is barely noticeable though.

Kinda unfair to ask this. 10 bolts dont take the beating 12 bolts do. My 12 bolt was quiet as shit til I put a big cube motor in my car and started beating on the rear a little....now it makes a little noise, but the 10 bolt would have been toast long ago....

But there are some 12 bolts..... like the moser my friend has that are so loud the person in the back cant even here the people in the front seat talking! So loud that you can HEAR it when you're driving next to the car over corsa exhaust! Now thats ridiculus!

well i guess its either a strong, but loud rear end... or FWD

My Moser 12-bolt with 3.90s has been incredibly loud since day one. It's so bad, in fact, that it's hard to hear the exhaust over the gears.

Josh

my 12 bolt is pretty quiet, but I have only started driving it.

There is some gear noise but not much. Scott at Driveline Solutions built my moser 12 bolt.

My s60 w/4.10's howls around 40-65 mph. Other than that it drives like stock, with no clunking or anything.

my 9" with truetrack and 3.90' howls a lil bit, but i naver rode in a car thats 10 bolt was new, but my 9" is quieter then my 10 bolt was when i took it out

loud as hell 12 bolt here

i have a 9 inch on my ss and its quite like if it was my stock 10 bolt, and i have 4.10 i think that it doesnt really matter on the brand

Nope, my moser 9" 35 spline locker whines pretty good under decel, prly makes ppl wonder what i got under the hood. I dont care if it whines a little the exhaust makes enough noise already, these arent family cars!

my 9 in wines a little on decel also, its not that bad, i can still here the valvetrain so what does that tell you.

A friend and I just put mine in today. Howls some on the gas but is quiet on decel. Don't know if that will change with a few miles or not. It's a Strange "S" case set up by a local shop w/3.89's, Truetrack, their custom housing, and Moser axles.http://ls1tech.com/forums/showthread.php?t=728687

my motive gears are just slightly louder in the 50mph range then the gm gears

I've got Motive 3.90's and a TA Cover. It's quieter than it's ever been since I bought it at 40k miles, and I'm still running a stock muffler. I had Richmond gears for a while, and they were annoyingly loud, I hated them. And they broke.

With the A4, you could run cosistant 11's, with that 10 bolt, heads/cam, converter and 3.73 gears. A buddy of mine ran mid 11's all the time and sprayed into the 10's, never broke, and quite. Save your $2500. untill it breaks.

My 9 inch is pretty quite with 4.11 gears and a Trutrac. Not as quiet as a stock gear set because they are performance gears. But, I can't hear them over my exhaust or valve train noise (cam). The guy that set it up told me the noise issues depend on several things. The first is setting it up right (the person doing the work) and the second is the manufacturing tolerances in the gear set. Some sets are easier than others, and some will never be quiet. Sometimes it takes more than one try to get it right. The first one he did for me was fine. The second one he did took three tries to get it right (yes he showed me the patterns each time and they looked good). He cautioned me each time that if it made noise, not to drive it and get it back to him right away. Of course, this is the reason I bought the 9 inch rather than the other offerings--much easier to get the center section in and out.

I have Richmonds and they whine like a SOB.

Burkhart built my Fab9. Quiet as stock.

my new moser 9in. screams at 50 mph on. there was a note in the box that
high performance gears may whine........its funny that when my shop sets
them up they run quiet. theres no excuse for a proper set up to scream :barf:

If gears are setup right they shouldnt be rediculously loud you can stand it. Set them up right and they wont be loud, bottom line.

my 9", turetrack, 3.90's motive set up has a little whine to it, you dont hear it until about 55mph and is a tad louder on decel. Its not that bad and I have about 1k miles on it. Im gonna change the oil on it and see what that does.

does clicking around corners count? lol

Brand New Moser 9" here and it whines on decel, around 50 mph it is really humming - annoying!

Be aware that there is NO WARRANTY on these things, if you buy it and it is noisy you will be stuck with it. You will also get your disclaimer in the box that tells you noise is not uncommon and is to be expected.

Funny how some people have no noise in their 9" rear ends.......

Is is set-up, is it gear material (hardness)....those are the questions.

Personally, I believe it is set up. A BIG shop like that probably has kids on an assembly line kicking out 10 a day - to them its just another rear end.

Do your homework.

My stock 3.42's never made a sound, I had a rebuild done and had 4.10's installed. I did a great job of breaking them in, put just over 300 miles on it, never went over 2.5k rpms and never drove more then 30 miles without letting it cool down, they whinned at 45 mph and 75 mph, this weekend was the first time I've launched it and the rear whinnes from 30 up to 50 and it's pretty load now. Kinda strange, but it's happening.

Funny thing is there, in my experience. I have myself and 2 other friends who own Moser 12 bolts, one with 3.42 gears and 2 with 4.10's and from Moser they are louder then the 10 bolt. I had my 3.42's replaced with 4.10's and set up by Eastside Perf. and they are ALOT quiter, still louder then stock 10 bolt but not annoying.

lol still got the 10 bolt...but im about half-way saved up for a 9 " :)

My 9 inch is pretty quite with 4.11 gears and a Trutrac. Not as quiet as a stock gear set because they are performance gears. But, I can't hear them over my exhaust or valve train noise (cam).

Same setup - been in for several months. Much quieter than my 10 bolt when it was replaced but it was dying painfully. It's a bit louder than the 10 bolt was when I bought the car new but I only have a slight whine on decel - none on acceleration or normal driving. I have an M6 so if you downshift as you slow (like going around a corner) you'll never hear the whine over the exhaust - Kooks w/GMMG catback.

My Moser 12-bolt with 3.90s has been incredibly loud since day one. It's so bad, in fact, that it's hard to hear the exhaust over the gears.

Josh

I've got a loudmouth so thats not a prob but my moser 12 is a whiner as well

how muc you want for the rearend

there should be a choice in this pole that reads "i still have my 10bolt and is loud as shit"

:mad:

my stange 12b whines like a two dollor whore

Look, they make noise. It isn't objectionable to me, but it is to some.

Main thing... it don't break!

"i still have my 10bolt and is loud as shit"

:werd:

Midwest 9" gears setup by Midwest prior to shippping and broken in just as I was told. Had slight whine on decel during break in, now has 4k miles on it with no whine at all.

I have the midwest rear and the gears are silent all the time.

I can tell my 9" is back there. I can't hear it over the exhaust but it does clunk sometimes turning corners in a parking lot. The torque arm probably changed the way my car feels more than anything so far, but hey, it's a hot rod and that's what I wanted and that's what I got. I wouldn't change a thing that I've done. Can't wait to get my new ARH's and solid motor mounts installed along with my LS6 manifold.

This thread is old as hell.

Anyway, I say if you think that your rear-end is too loud than it means you need to get louder exhaust. :P

Midwest Chassis Fab 9" , during and after break in, no noise.

Midwest Fab 9. Beat the hell out of it last yr. Never made any noise at all.


Chris

strange 12bolt, quiet as can be, we will see when i put the 4.10s in.

Strange 9", about 1600 miles on it, quiet as can be. I haven't dumped it on slicks yet though, just street trashing on 315 nitto drs.

Can't hear a damn thing out of my MWC 9". My 10 bolt was louder on its best day.

Personally, I believe it is set up. A BIG shop like that probably has kids on an assembly line kicking out 10 a day - to them its just another rear end.

Buddy of mine built rears for strange for a while and is now in sales for them, I remember him saying he built like 4-6 a day usually.

Can't hear a damn thing out of my MWC 9". My 10 bolt was louder on its best day.

What gearset did you get from him? I was told that motive was having some issues and he recommended some richmond gears instead for a lil more $. I figured everyone is super happy with what he has been building so I followed what he had to say.

Richmond gears

I've got a Moser 9" with a detroit locker so.... Not even close :jest:

there should be a choice in this pole that reads "i still have my 10bolt and is loud as shit"

+100
yep!

Well My moser 12 bolt whined from day 1, blew up on day 4.
Sent it back, whined lasted 1 year
Rebuilt it had a slight whine, blew up 2 years later.

Built my own narrowed 9" housing using strange, moser and motive parts and had a friend of mine who is an expert set them up, quiet as can be.

4.56's spool, 35 spline.... alum case.

However, when I turn, screachh thump thump, but you guys all know ya gotta roll with a spool when you keep blowing diff's.... :)

Well My moser 12 bolt whined from day 1, blew up on day 4.
Sent it back, whined lasted 1 year
Rebuilt it had a slight whine, blew up 2 years later.

How did you get Moser to take the rear back? Mine shattered a pinion bearing while cruising down the highway and they told me that their warranty only applies to faulty parts or workmanship (which mine was, bearings don't just explode...) , and is basically voided as soon as you drive the car...

I hate Moser with a passion and would get rid of the 12 in a heartbeat if I could...