rear end noise (marbles in a box)
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My rear end is stock. When I take my foot off the gas and coast, or go around corners I can hear what's best described as a "marbles in a box" noise coming from the rear end. I've read where others have described this as well but I'm not certain if this is something I should live with. Is this common?
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Originally Posted by SRM
I'm not certain if this is something I should live with.
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This does happen , had anything done to the diff?
Pinion seal?
It could be pinion bearings or the ring & pinion making a coast noise.
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same problem here, dont worry about it. the dealer, yeah i know..., well they said it was normal and i confirmed this with several people. they told me that with a new rear end it made an even worse noise. kinda freaked me out cause i heard it after driving my car hard for the first time after i got it but like i said they say its normal rear end movement and if u get it fixed it might be worse. now if u get a new rear end other than the stcok one or have new gears put in im sure they can stop it. i have been hammering on mine for over a year now with it making that noise and knock on wood its still holding up fine. that is also with some 2nd gear hard drops and hammering it in 1st a lot at mid rpms.
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It's very noticable if you are coasting and going into a curve, say around 40ish (taking an exit for example). If I straighten out or give it a little gas, the noise disappears.
I still have a warranty so I'll most likely take it in. Anyone else?
I still have a warranty so I'll most likely take it in. Anyone else?
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yeah mine does the same thing and the dealer told me its normal. and like i said everybody told me their rear ends do this also. its hit or miss. your new one could be worse, its not that there is anythign wrong with it. mine does it in my neighborhood when im goin about 20 or higher and i can her that SOB real good. mostly on left hand turns i hear mine
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This coming Monday I'm bringing my car in and taking a tech for a ride to listen. We'll see. If they say it's normal I'm not sure I can live with that *only* because it seems more noticable within the last 4 months. I've had this car for over 3 years and I've only begun noticing it until recently.
Anyway, I have a pretty good extended warranty so I may as well use it. I'll let you know what happens on Monday.
Anyway, I have a pretty good extended warranty so I may as well use it. I'll let you know what happens on Monday.
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Originally Posted by SRM
My rear end is stock. When I take my foot off the gas and coast, or go around corners I can hear what's best described as a "marbles in a box" noise coming from the rear end. I've read where others have described this as well but I'm not certain if this is something I should live with. Is this common?
However, if you take a look at this specific differential, or even talk to someone at Torsen (I think it's owned by Toyoda-Koki...no, not Toyota!...now), you can begin to understand the source of the noise.
Unlike other posi-units that use some kind of frictional pre-load (ie., clutches), the Torsen uses a gear-driven mechanism to sense torque and handle the differentiation to each wheel (much like a Locker, but, technically, not a Locker). The basic premise uses the load on the drivetrain (acceleration or engine-based deceleration) to force the side gears against opposite sides of the housing. In a no-load situation, these gears are not thrust against any particular direction in the housing and, hence, one gets that characteristic rattling sound (since there's no clutch to pick up the slack).
It's actually a pretty slick design, albeit a little annoying from a sound perspective. Also, each of these rears have their own noise charateristic. I think mine is one of the noisier units I've come across, but it's been trouble-free for ~54K miles.
Hope that helps. If you don't have a Torsen, I apologize for the long-winded response...but then, you'd better get that thing checked out!
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Dealer just called. Said I need a new rear end.
Hopefully know more when I pick up my car tonight. Well, so much for the "marbles in box" noise. At least in my case it wasn't normal!!
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Is GM paying for it, or are you? I've read a lot of posts on this, because my car does it. Knowledgeable guys basically take the position of Fran D above. It is inherent to the Zexel-Torsen design, as opposed to the Auburn units used on 98 and earlier 4th gen F-bodies. Thus my 94 Formula never made a sound, while the 00 rattles away.
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Originally Posted by SRM
This coming Monday I'm bringing my car in and taking a tech for a ride to listen. We'll see. If they say it's normal I'm not sure I can live with that *only* because it seems more noticable within the last 4 months. I've had this car for over 3 years and I've only begun noticing it until recently.
Anyway, I have a pretty good extended warranty so I may as well use it. I'll let you know what happens on Monday.
Anyway, I have a pretty good extended warranty so I may as well use it. I'll let you know what happens on Monday.
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Everthing in the housing is getting replaced.
As I understand it, a "bushing" was defective which caused a part to sieze in the torsen unit. It also caused the ring and pinion to be out of proper alignment therefore the "noise" I desribed above while coasting into right-hand turns. This specific noise wasn't the "marbles in box" sound that I could hear sometimes.
They don't have a reason as to why this happened.
As I understand it, a "bushing" was defective which caused a part to sieze in the torsen unit. It also caused the ring and pinion to be out of proper alignment therefore the "noise" I desribed above while coasting into right-hand turns. This specific noise wasn't the "marbles in box" sound that I could hear sometimes.
They don't have a reason as to why this happened.
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Got my car back. Here's what was replaced for a grand total of ~$2100 including parts, labor and car rental:
12471191 Gear Set
22510042 Bearing
9417784 Bearing
26026792 Seal
12471371 Case
9420095 Bearing
26016661 Gasket
12378261 Gear Oil
1052358 Lubrication
No more "marbles in the box" noise. All this was covered by my extended warranty.
12471191 Gear Set
22510042 Bearing
9417784 Bearing
26026792 Seal
12471371 Case
9420095 Bearing
26016661 Gasket
12378261 Gear Oil
1052358 Lubrication
No more "marbles in the box" noise. All this was covered by my extended warranty.
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Good for you! It certainly looks like you got your money's worth out of the extended warranty.
You didn't happen to slip them a 4.10 ring & pinion to slide in there while they were at it, did you?
You didn't happen to slip them a 4.10 ring & pinion to slide in there while they were at it, did you?
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Originally Posted by SRM
My rear end is stock. When I take my foot off the gas and coast, or go around corners I can hear what's best described as a "marbles in a box" noise coming from the rear end. I've read where others have described this as well but I'm not certain if this is something I should live with. Is this common?