After breaking in 1000 miles on my 9".... can I do anything about the whine?
Huh?
Setting the backlash, if you're not a mongaloid, should only be done once, and once only. IF, you know what you're doing. IF it takes you more than one shot to get the backlash set correctly, you have no business touching a rearend.
It's going to whine. If you don't like it on long drives, go buy a new Phil Collins CD and turn the radio up........
FWIW... I have a JVC CD player, JL Audio Amp, 2 sets of JL Audio components, a subthump single 12" with a Diamond Audio sub.... and I can still hear it even with the volume turned up quite a bit. I dont think its normal. We'll see what happens when I get it back from the sponsor I bought it from.
Banned
Joined: Mar 2007
Posts: 661
Likes: 0
From: Shreveport,Louisiana
Yeah , all this **** with rear ends really pisses me off. You scrimp & save to buy the best lookin & fastest muscle car out there only to find out later that even if you don't beat on it the ****** rear ends gonna either start howlin or break or both. And there is NO alternative replacement rear end assy that won't highway quietly and hold together if raced even occasionally . So , basically , we're fucked ! That's why after spending an embarrassing amount of money trying to fix this beautiful bucket of bolts , I'm selling this money pit. I'm cuttin bait now. What fun is it to have a nice lookin car that is admittedly pretty damn fast but one that you can't enjoy riding on the street or just cruisin with the top down with all that howlin & whine sound coming from the rear end ? No , I'm afraid I'm just too uncompromising when it comes to driving around in a clunker that sounds like the rear end is about to fall out from under it. Its kinda hard to be cool when driving a clunker. Typical red-neck territory , not that there's anything wrong with being a red-neck. Hell , I was once one in my younger days . To make a long story short,I'm going back to Mustang. A Shelby 500 to be exact. Something with a bitchin sounding true duals & a GOOD solid rear end with NO howl on the highway and a roomy back seat . Yeah , all this **** with rear ends really pisses me off. You scrimp & save to buy the best lookin & fastest muscle car out there only to find out later that even if you don't beat on it the ****** rear ends gonna either start howlin or break or both. And there is NO alternative replacement rear end assy that won't highway quietly and hold together if raced even occasionally . So , basically , we're fucked ! That's why after spending an embarrassing amount of money trying to fix this beautiful bucket of bolts , I'm selling this money pit. I'm cuttin bait now. What fun is it to have a nice lookin car that is admittedly pretty damn fast but one that you can't enjoy riding on the street or just cruisin with the top down with all that howlin & whine sound coming from the rear end ? No , I'm afraid I'm just too uncompromising when it comes to driving around in a clunker that sounds like the rear end is about to fall out from under it. Its kinda hard to be cool when driving a clunker. Typical red-neck territory , not that there's anything wrong with being a red-neck. Hell , I was once one in my younger days . To make a long story short,I'm going back to Mustang. A Shelby 500 to be exact. Something with a bitchin sounding true duals & a GOOD solid rear end with NO howl on the highway and a roomy back seat .x2, rear ends should'nt be so ******* expensive and not work right. Though I'd never buy a mustang.
Huh?
Setting the backlash, if you're not a mongaloid, should only be done once, and once only. IF, you know what you're doing. IF it takes you more than one shot to get the backlash set correctly, you have no business touching a rearend.
It's going to whine. If you don't like it on long drives, go buy a new Phil Collins CD and turn the radio up........
Setting the backlash, if you're not a mongaloid, should only be done once, and once only. IF, you know what you're doing. IF it takes you more than one shot to get the backlash set correctly, you have no business touching a rearend.
It's going to whine. If you don't like it on long drives, go buy a new Phil Collins CD and turn the radio up........
There is no reason why a freshly set up rear with new(good) gears and bearing should make noise. There are defective gears and bearings out there, but for people to say you should expect noise is no true. There are rears that initially are quiet and after a few hard launches will make some noise, but if the gears are good the should be set up quietly.
It's all about the pinion depth, gear lash, bearing preload and having the right pattern.
A lot of places will assemble the center sections and give it the good enough to sale stamp, only thing to do would be have someone check the specs.
A lot of the times places will write on the gears themselves the installation measurements, maybe you can pull the center section and look for it.
Most likely you'll need to get them shimmed a bit one way or the other to get ride of the whine.
A lot of places will assemble the center sections and give it the good enough to sale stamp, only thing to do would be have someone check the specs.
A lot of the times places will write on the gears themselves the installation measurements, maybe you can pull the center section and look for it.
Most likely you'll need to get them shimmed a bit one way or the other to get ride of the whine.
Banned
Joined: Mar 2007
Posts: 661
Likes: 0
From: Shreveport,Louisiana
Yeah , Yeah ! !
You need this or you need that . Bla! Bla! Bla! Yada! Yada! Yada!
The fact of the matter is , , , , it's a black art ! It's a hit or miss proposition. Even the so called experts admit it's really just a shot in the dark. Everything , and I mean "EVERYTHING" can be spot on and there is still at least a 50/50 chance that sucker is gonna howl if not right away then sooner rather than later. That's why so many F-body cars end up being race only cars . Guys eventually just give up trying to quiet their howlin rear end & just strip it down & make that loud ****** a race only vehicle.
You need this or you need that . Bla! Bla! Bla! Yada! Yada! Yada!
The fact of the matter is , , , , it's a black art ! It's a hit or miss proposition. Even the so called experts admit it's really just a shot in the dark. Everything , and I mean "EVERYTHING" can be spot on and there is still at least a 50/50 chance that sucker is gonna howl if not right away then sooner rather than later. That's why so many F-body cars end up being race only cars . Guys eventually just give up trying to quiet their howlin rear end & just strip it down & make that loud ****** a race only vehicle.
Yeah , Yeah ! !
You need this or you need that . Bla! Bla! Bla! Yada! Yada! Yada!
The fact of the matter is , , , , it's a black art ! It's a hit or miss proposition. Even the so called experts admit it's really just a shot in the dark. Everything , and I mean "EVERYTHING" can be spot on and there is still at least a 50/50 chance that sucker is gonna howl if not right away then sooner rather than later. That's why so many F-body cars end up being race only cars . Guys eventually just give up trying to quiet their howlin rear end & just strip it down & make that loud ****** a race only vehicle.
You need this or you need that . Bla! Bla! Bla! Yada! Yada! Yada!
The fact of the matter is , , , , it's a black art ! It's a hit or miss proposition. Even the so called experts admit it's really just a shot in the dark. Everything , and I mean "EVERYTHING" can be spot on and there is still at least a 50/50 chance that sucker is gonna howl if not right away then sooner rather than later. That's why so many F-body cars end up being race only cars . Guys eventually just give up trying to quiet their howlin rear end & just strip it down & make that loud ****** a race only vehicle.
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Verdad Gallardo Banned
Joined: Mar 2007
Posts: 661
Likes: 0
From: Shreveport,Louisiana
Thats weird, because probably close to 100% of them were quiet when they were stock. There will be the occasional noisy rear, but it is nowhere near 50/50 and far from a shot in the dark. The torque arm will magnify the noises the rears makem but my Motive 3.90's were dead silent when I installed them.
They were dead silent until I pulled the front wheels off the ground launching at the drag strip. Being a stock 7.6 I expected it (I also did not have a solid spacer at the time, so it has a crush sleeve which I am sure gave way some), but a 9" or 12 bolt I would almost guarantee would still be dead silent. There are plenty of 9" rears that see tons of abuse and are still silent- some I have set up. A 7.6- I am glad I can drive it home.
Noisy Moser I can add to this thread. I went with a Moser complete 9" thinking I would save a little time and just for the ease and convenience. I will never do it again. Jist of it. It was and is obnoxiously loud, from day one. Accel, decel, doesn't matter. The pitch of noise changes so much I could record a sound track from it.
Rear gears can be set-up quietly, look at the factory rears. You just have to take the time to do it and apparently Moser is spitting them out on an assembly line - its the 'good enough' mentality. And with a no warranty policy why bother.
Here was the thread I started a couple months back.
https://ls1tech.com/forums/showthrea...ht=noisy+moser
Still haven't took it apart, between being frusturated with it and working a few other bugs out of my NEW combo haven't had the time. Its not a daily driver, just a toy.
When I do I will inspect everything, take a pattern and take plenty of pics for the site.
I have to agree, its just not right to pay 2500.00 for a complete rear and end up with this plus having to do it all over again.
Rear gears can be set-up quietly, look at the factory rears. You just have to take the time to do it and apparently Moser is spitting them out on an assembly line - its the 'good enough' mentality. And with a no warranty policy why bother.
Here was the thread I started a couple months back.
https://ls1tech.com/forums/showthrea...ht=noisy+moser
Still haven't took it apart, between being frusturated with it and working a few other bugs out of my NEW combo haven't had the time. Its not a daily driver, just a toy.
When I do I will inspect everything, take a pattern and take plenty of pics for the site.
I have to agree, its just not right to pay 2500.00 for a complete rear and end up with this plus having to do it all over again.
Banned
Joined: Mar 2007
Posts: 661
Likes: 0
From: Shreveport,Louisiana
They were dead silent until I pulled the front wheels off the ground launching at the drag strip. Being a stock 7.6 I expected it (I also did not have a solid spacer at the time, so it has a crush sleeve which I am sure gave way some), but a 9" or 12 bolt I would almost guarantee would still be dead silent. There are plenty of 9" rears that see tons of abuse and are still silent- some I have set up. A 7.6- I am glad I can drive it home.
Like I said before, the torque arm does magnify noise, but there are plenty of 7.5/7.6, 9 bolts and some Dana 44's that were quiet from the factory, so there is no reason why a quality aftermarket rear cant be quiet.
Just because you cant get yours quiet (or your installer) doesnt mean that everybody has to deal with noise, and it also does not make it a 50/50 proposition. A small ring gear(7.6) pulling 1.5x 60fts in a over 3700lb race weight vehicle(I carry tools, etc- and it has been weighed), I do not expect it to stay quiet forever. A 12 bolt or 9", assembled with quality parts and set up correctly, so STAY quiet. And MANY, MANY have.
Its not a dream. Myself as well as a few others who post in this forum have set up rears for a living. There are quite a few 9" rears that I have personally set up that have seen many a wheels up launch in heavier cars that are still dead silent on the street. I will probably do either a 9" or 12 bolt next year, and if I do a 9" I will guarantee I set it up quiet and it will stay quiet. The 12 bolt I cant speak for since they are aftermarket centers, but I set up plenty of OEM rears quietly. The aftermarket nodular and aluminum centers for the 9" have been around for years and are proven.
Like I said before, the torque arm does magnify noise, but there are plenty of 7.5/7.6, 9 bolts and some Dana 44's that were quiet from the factory, so there is no reason why a quality aftermarket rear cant be quiet.
Just because you cant get yours quiet (or your installer) doesnt mean that everybody has to deal with noise, and it also does not make it a 50/50 proposition. A small ring gear(7.6) pulling 1.5x 60fts in a over 3700lb race weight vehicle(I carry tools, etc- and it has been weighed), I do not expect it to stay quiet forever. A 12 bolt or 9", assembled with quality parts and set up correctly, so STAY quiet. And MANY, MANY have.
Like I said before, the torque arm does magnify noise, but there are plenty of 7.5/7.6, 9 bolts and some Dana 44's that were quiet from the factory, so there is no reason why a quality aftermarket rear cant be quiet.
Just because you cant get yours quiet (or your installer) doesnt mean that everybody has to deal with noise, and it also does not make it a 50/50 proposition. A small ring gear(7.6) pulling 1.5x 60fts in a over 3700lb race weight vehicle(I carry tools, etc- and it has been weighed), I do not expect it to stay quiet forever. A 12 bolt or 9", assembled with quality parts and set up correctly, so STAY quiet. And MANY, MANY have.
9s arent that hard to do.....a good rear guy should always back his set up with a good pattern and reset it if it isnt perfect.... somethings wrong from what you described...ive installed used gears dead quiet,....456s and up its a crap shoot but 390s in a 9???????
Joined: Mar 2005
Posts: 1,599
Likes: 0
From: 32639 Groesbeck HWY. Fraser MI 48026
You guys are not taking into consideration that everything is aftermarket. From the center section to the gears and they did not factor in quietness when they produced them. I have been building rears for over 15 years and I have seen everything from the aftermarket to the OEM. Believe me everyone has gear noise problems. As a matter of fact I am accepting a new job after the first of the year at AAM, American Axle and MFG, in their gear lab. I have had a few interviews with them and I have seen their process from start to finish. Now we are talking maybe 20 parts per million and not just one gear set, big difference.
my 4.11 moser 9 is as quiet as my stock 10 bolt. i heard about the quality control issues so i had my friend check it out before i bolted together. it checked out perfect without needing further adjustment. maybe try some 140w gear lube?
You guys are not taking into consideration that everything is aftermarket. From the center section to the gears and they did not factor in quietness when they produced them. I have been building rears for over 15 years and I have seen everything from the aftermarket to the OEM. Believe me everyone has gear noise problems. As a matter of fact I am accepting a new job after the first of the year at AAM, American Axle and MFG, in their gear lab. I have had a few interviews with them and I have seen their process from start to finish. Now we are talking maybe 20 parts per million and not just one gear set, big difference.
On The Tree
Joined: Nov 2007
Posts: 187
Likes: 0
From: Summerside, PE, Canada
