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-   -   Q: Rear differential sounds? (https://saleenforums.soec.org/showthread.php?t=22861)

lr281 06-30-2020 04:51 PM

Q: Rear differential sounds?
 
Hello,

I own a 1999 S281 SC Speedster with 92k miles. Iíve been hearing a rumble type sound when decelerating and noticeable at very low speeds. I had the outer axle bearings replaced thinking that was the problem, but the noise is still there. Could this be caused by a worn preload pinion bearing or something else? The car has the 3.73 gears.

I would appreciate any input on this.

Thanks,

Lou R.
1999 S281 SC Speedster #99-310

DarkStallion 07-03-2020 02:41 PM

Rear gear noise
 
Do you know if you have the MaxGrip? I know that some thought that end-cap bolts worked their way those on some. First isolate the noise at rear end and once confirmed get in there and check things out. Given mileage not a bad idea to have the rear end serviced, there you can check for metal shavings, fill with new oil and reseal. If there is a problem, to re-gear/lash/shim it is not that expensive. You can either go with the same or go lower. I would probably keep stock to keep speedo accurate. Let us know what you find.

lr281 07-03-2020 05:43 PM

Quote:

Originally Posted by DarkStallion (Post 150014)
Do you know if you have the MaxGrip? I know that some thought that end-cap bolts worked their way those on some. First isolate the noise at rear end and once confirmed get in there and check things out. Given mileage not a bad idea to have the rear end serviced, there you can check for metal shavings, fill with new oil and reseal. If there is a problem, to re-gear/lash/shim it is not that expensive. You can either go with the same or go lower. I would probably keep stock to keep speedo accurate. Let us know what you find.

Thanks for the feedback. Iím gonna have it checked by my mechanic. I only drive the car on weekends during the summer. Is there any risk of further damage if still drive it until Iím able to get it resolved?

DarkStallion 07-03-2020 05:53 PM

Rear end noise
 
If you hear some grinding anywhere on our car while you are driving it, I recommend not using it until you know exactly what the issue is and fixing it. Not worth having to pay more money if it is in a "fixable" or addressable condition now. A good mechanic should be able to isolate the noise quickly. Oh check your tires too for nails...sometimes you can have an object in one that can make noise under slow driving conditions. It literally can be anything so don't tear anything apart until you are sure. Good luck, let us know.


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