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Old 12-23-2013, 06:57 PM   #1
c_LoW29


 
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Subframe bushings diff noise

Just installed some polyurethane differential bushings and wanted to know if anyone else has them installed and if after the install you are able to hear the driveshaft engaging at low speeds when letting off the accelerator and re applying it. I know there is some slack in the drivetrain in this area just never heard it before with stock bushings. Before anyone asks I ensured all the bolts were very tight to spec of course
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Old 12-23-2013, 07:10 PM   #2
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I assume you're talking about the diff bushings and not the subframe ones? Assuming that's right, the diff bushings are known for transmitting a bit of noise after replacing those.
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Old 12-23-2013, 07:26 PM   #3
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Originally Posted by lscamaro View Post
I assume you're talking about the diff bushings and not the subframe ones? Assuming that's right, the diff bushings are known for transmitting a bit of noise after replacing those.
Yes the diff bushings. It only happens at low speeds like parking lot areas when there is slack in the driveshaft and I take it out by pressing the accelerator it has a tap noise that follows
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Old 12-23-2013, 07:38 PM   #4
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Originally Posted by c_LoW29 View Post
Yes the diff bushings. It only happens at low speeds like parking lot areas when there is slack in the driveshaft and I take it out by pressing the accelerator it has a tap noise that follows
Generally from what I've seen on the forums, a lot of guys only upgrade the cradle bushings, and leave the diff bushings alone for the reason you made this thread. I just got my poly bushings, but I didn't order the diff bushings, just the cradle ones. You get added NVH when you replace the diff bushings.
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Old 12-23-2013, 07:43 PM   #5
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Generally from what I've seen on the forums, a lot of guys only upgrade the cradle bushings, and leave the diff bushings alone for the reason you made this thread. I just got my poly bushings, but I didn't order the diff bushings, just the cradle ones. You get added NVH when you replace the diff bushings.
Ok so then it is normal just wanted to get some feedback from people that have actually used them and has the same issue
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Old 12-23-2013, 08:08 PM   #6
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Yes, it is completely normal. If you put stiffer bushings on the diff you are going to hear gear/drivetrain noise.
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Old 12-23-2013, 08:22 PM   #7
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How noticeable is the diference?
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Old 12-23-2013, 08:33 PM   #8
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How noticeable is the diference?
It depends on the bushings you go with and even then can vary from car to car depending on how the gears are set up.
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Old 12-23-2013, 08:36 PM   #9
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Any chance an aggressive exhaust note might cover the added noise?
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Old 12-26-2013, 10:07 AM   #10
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Drive Line Noise

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Originally Posted by JMWNERW View Post
Any chance an aggressive exhaust note might cover the added noise?

No the exhaust will not cover it up I have done the diff bushings and Phadt sub frame mounts and my car sounds like a four link car I don't really like the drive line noise but I guess sacrifices just have to be made for performance

Just a note I have 3 inch exhaust with a large cam and you would not want a exhaust any louder than mine and I still here all the drive line noise ( some wining from gears, clunk from drive line slack and some clutch pak noise

SOO if you dont want the noise leave the stock diff mounts
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Old 12-26-2013, 12:29 PM   #11
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The radio at regular volume covers the noise quite well. Definitely worth it though. You should look up videos of how much the rear end moves with stock bushings.
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