LOUD 9" Rear-end....Help
04-30-2009, 10:21 AM
#1
LOUD 9" Rear-end....Help I have a Ford 9" with a aluminum Strange center section, Detroit TruTrac, 3.70 gears, and moser 30 spline axles. I have tubular LCA, Panhard bar, panhard bar relocation kit, BMR torque arm connected to a UMI torque arm relocation transmission crossmember. All items are connect to the car via poly bushings. Car is a 2001 WS6. I have one major problem though, the rear end is AMAZINGLY LOUD. Cruising at 45 - 80 mph, its so loud that I can't even hear the exhaust of my 427 motor. I have to basically yell to have a conversation in the car, and sometimes its so loud that it literally hurts my ears. I have a few questions regarding this:
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
04-30-2009, 10:48 AM
#2
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I have a Ford 9" with a aluminum Strange center section, Detroit TruTrac, 3.70 gears, and moser 30 spline axles. I have tubular LCA, Panhard bar, panhard bar relocation kit, BMR torque arm connected to a UMI torque arm relocation transmission crossmember. All items are connect to the car via poly bushings. Car is a 2001 WS6. I have one major problem though, the rear end is AMAZINGLY LOUD. Cruising at 45 - 80 mph, its so loud that I can't even hear the exhaust of my 427 motor. I have to basically yell to have a conversation in the car, and sometimes its so loud that it literally hurts my ears. I have a few questions regarding this:
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
i think he is blowing smoke up ur ***; I.E, he has no idea what he is doing/talking about and thnks ur an idiot. I have never heard of "softer gears"; what does he want you to do, use Playdough?
I would take it somewhere else and have THEM check the backlash.
04-30-2009, 11:24 AM
#3
I have a Ford 9" with a aluminum Strange center section, Detroit TruTrac, 3.70 gears, and moser 30 spline axles. I have tubular LCA, Panhard bar, panhard bar relocation kit, BMR torque arm connected to a UMI torque arm relocation transmission crossmember. All items are connect to the car via poly bushings. Car is a 2001 WS6. I have one major problem though, the rear end is AMAZINGLY LOUD. Cruising at 45 - 80 mph, its so loud that I can't even hear the exhaust of my 427 motor. I have to basically yell to have a conversation in the car, and sometimes its so loud that it literally hurts my ears. I have a few questions regarding this:
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
1. No its NOT normal.
2. Gears are not set right.
3. Again possibly bad gear setup or even a driveshaft out of balance.
4. Softer gears are more durable but are a bit louder. Loud as you claim and them being called "fixed" is BS.
5. Write the current gears off and have someone who knows what they are doing make it right and run nearly silent if not totally silent.
Gears are a funny thing. Mine were set up by someone else and they were quiet at first then started screaming like you descibed. I ended up pulling it and adding .008 pinion shim IIRC and they are nearly dead silent. It is not uncommon to have to reset the gears a couple of times to get them quiet. Luckily the 9" is very easy to do.
Last edited by wrd1972; 04-30-2009 at 03:42 PM.
04-30-2009, 03:39 PM
#5
What else do you really need to be informed about? He was again told it was fixed.
05-01-2009, 12:16 AM
#6
When the installer told the OP that it was fixed, and the OP states that it is now as loud as was before the installer reset the gears, here lies the problem. Fixed means fixed or at the least marginally to significantly more quiet than before as it relates to the gears.
What else do you really need to be informed about? He was again told it was fixed.
What else do you really need to be informed about? He was again told it was fixed.
Haans249, are you sure there isn't another problem? If you are running a stock length drive shaft, it is probably too short. This could cause some noise and vibration, not really like gear noise, though....
With everything assembled and the suspension loaded, see how much yoke is sticking out of the tail shaft of the trans. There should be a solid coupling there and the yoke should be pulled out no more than an inch.
Double check to make sure nothing is making contact with the bottom of the car.
If it were mine and I lived close to the shop (DLS is in Michigan IIRC), I'd bring in the whole car...can you do that?
05-01-2009, 09:39 PM
#7
Sorry for the confusion, I was referring to the post ahead of yours.
Haans249, are you sure there isn't another problem? If you are running a stock length drive shaft, it is probably too short. This could cause some noise and vibration, not really like gear noise, though....
With everything assembled and the suspension loaded, see how much yoke is sticking out of the tail shaft of the trans. There should be a solid coupling there and the yoke should be pulled out no more than an inch.
Double check to make sure nothing is making contact with the bottom of the car.
If it were mine and I lived close to the shop (DLS is in Michigan IIRC), I'd bring in the whole car...can you do that?
Haans249, are you sure there isn't another problem? If you are running a stock length drive shaft, it is probably too short. This could cause some noise and vibration, not really like gear noise, though....
With everything assembled and the suspension loaded, see how much yoke is sticking out of the tail shaft of the trans. There should be a solid coupling there and the yoke should be pulled out no more than an inch.
Double check to make sure nothing is making contact with the bottom of the car.
If it were mine and I lived close to the shop (DLS is in Michigan IIRC), I'd bring in the whole car...can you do that?
Other than that, I did take it back to him and thats when he said he fixed the noise. He did say he adjusted the backlash etc... but it didn't do anything, it was still super loud and still is to this day. He has done all of the rearend work on my car from installing it and readjusting the backlash.
I'm not saying that he is a liar, or that he thinks I'm an idiot etc... he is a really awesome guy, and I really enjoyed working with him. Hell, I even paid him more than he was asking out of good faith. I'm just to the point now that I can't stand the noise any longer and wanted to check and see if its normal or not. I'm hearing that it shouldn't be like that.
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05-01-2009, 09:48 PM
#8
1. No its NOT normal.
Thats a relief, let me tell ya.
2. Gears are not set right.
My initial thought
3. Again possibly bad gear setup or even a driveshaft out of balance.
Driveshaft is a possibility, but the vibration when i say "heavy" is like a cell phone vibrating on horse steroids
4. Softer gears are more durable but are a bit louder. Loud as you claim and them being called "fixed" is BS.
He never replaced the gears, he just reset the backlash. I thought about getting gears replaced with "softer" gears as he suggested, but I suppose now that's not quite right.
5. Write the current gears off and have someone who knows what they are doing make it right and run nearly silent if not totally silent.
I'm thinking of taking it to Driveline Solutions here (DLS) in Detroit.
Gears are a funny thing. Mine were set up by someone else and they were quiet at first then started screaming like you descibed. I ended up pulling it and adding .008 pinion shim IIRC and they are nearly dead silent. It is not uncommon to have to reset the gears a couple of times to get them quiet. Luckily the 9" is very easy to do.
Do your gears REALLY run nearly dead silent??! Even after your rear gets nice and "warmed" up? If I could get my rear to run nearly dead silent, I would probably **** my pants because my car would then be MUCH more enjoyable to drive! Remember, I have an ALUMINUM center section to save on weight, so is it possible that its just always going to be shifting? I'm not running more than 650-680 fwhp through it, but I do have a 6-speed and they're hard on rears...
05-01-2009, 10:24 PM
#9
Hmmm....I'd have him try changing the lash again. If that doesn't do it, maybe it's time to consider installing a different set of gears. From what I understand, the race gears will be softer metal and less prone to breakage, but they will also wear faster. I have no clue if they'd be more quiet as a rule....
05-01-2009, 11:17 PM
#10
my moser rear is NOISY AS HELL! that damn gear whine kills the pleasure of driving it on the highway. dunno if yu said you had a moser or not but i read somewhere on hear that the center sections are set up at moser just to get them shipped out and that to be truly satisfied you should have it set up at a professioal drivetrain/axle shop s there will be no noise. i have 4.11s and my god i wish i brought it to someone to re-set it up. i just assembled my rear and drove. big mistake
05-02-2009, 05:11 PM
#11
my moser rear is NOISY AS HELL! that damn gear whine kills the pleasure of driving it on the highway. dunno if yu said you had a moser or not but i read somewhere on hear that the center sections are set up at moser just to get them shipped out and that to be truly satisfied you should have it set up at a professioal drivetrain/axle shop s there will be no noise. i have 4.11s and my god i wish i brought it to someone to re-set it up. i just assembled my rear and drove. big mistake
05-03-2009, 07:44 AM
#12
Yes my gears are nearly silent. I know what screamers sound like and I have always been able to take screamers and make them near silent assuming they are rather new. IMHO its kind of hard to miss the backlash on 9" gears, its the pinion depth thats more of a PITA.
Pull the chunk out and snap some pics of the patterna. Bet they look like poo.
Pull the chunk out and snap some pics of the patterna. Bet they look like poo.
05-05-2009, 08:19 AM
#13
I have a Ford 9" with a aluminum Strange center section, Detroit TruTrac, 3.70 gears, and moser 30 spline axles. I have tubular LCA, Panhard bar, panhard bar relocation kit, BMR torque arm connected to a UMI torque arm relocation transmission crossmember. All items are connect to the car via poly bushings. Car is a 2001 WS6. I have one major problem though, the rear end is AMAZINGLY LOUD. Cruising at 45 - 80 mph, its so loud that I can't even hear the exhaust of my 427 motor. I have to basically yell to have a conversation in the car, and sometimes its so loud that it literally hurts my ears. I have a few questions regarding this:
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
1) IS THIS NORMAL?!
2) It ONLY makes the noise when rear is loaded (light throttle etc). Off throttle (coasting) it is as quiet as a sleeping baby.
3) During the loudest noises, I can feel a HEAVY vibration in my shifter handle and feel a heavy vibration on the tunnel over the rear between the back seats.
4) I took it back to the place I got it (Drivetrain Solutions) and had him check the backlash, he said he "fixed" it, but it sounded exactly the same - LOUD AS HELL. He said that he put in "race" gears and that a softer gear would quiet it down a little more, whats the difference? And where would I get "softer" 3.70 gears?
5) Now what the hell do I do?! The rear makes my car COMPLETELY terrible to drive and its my daily driver.
Thanks for any help!
Looks like Scott is up to his old tricks.
I had the same noise problems, I got screwed by him over a year ago and I got mine fixed locally, cost me $600 to get rid of the noise, new gear set, new bearings and install. The local guy checked everything before he tore it down and it was way out of spec.
05-05-2009, 08:44 AM
#14
The gears are not set up properly. I had the same problem on a tubbed 97 Z28 till I went in and re-set the pinion depth. He might have over or under torgued the pinion nut. You need to take it some where else. Really need to know what you are diong inside of there.
05-07-2009, 12:46 PM
#15
Looks like Scott is up to his old tricks.
I had the same noise problems, I got screwed by him over a year ago and I got mine fixed locally, cost me $600 to get rid of the noise, new gear set, new bearings and install. The local guy checked everything before he tore it down and it was way out of spec.
I had the same noise problems, I got screwed by him over a year ago and I got mine fixed locally, cost me $600 to get rid of the noise, new gear set, new bearings and install. The local guy checked everything before he tore it down and it was way out of spec.
05-11-2009, 11:14 AM
#20
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Here is the video.....so loud it drone's out my exhaust hahaha.
http://www.youtube.com/watch?v=GX63NQsG1mg
http://www.youtube.com/watch?v=GX63NQsG1mg