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whiteline diff bushing gear noise

Originally Posted by andy_meng1024 It's normal. I have the SPL ones, probably 3 times worse than Whiteline in noise, but 3 times better in performance. I love the sound the

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Old 02-19-2015, 10:13 PM   #16 (permalink)
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It's normal. I have the SPL ones, probably 3 times worse than Whiteline in noise, but 3 times better in performance.
I love the sound the SPL bushing makes except when it whines right at the common speed limit around here, 40 mph.
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Old 02-19-2015, 10:51 PM   #17 (permalink)
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The safe thing is to expect it will make noise.
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Old 02-19-2015, 11:45 PM   #18 (permalink)
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Makes me think twice about getting the whitelines now. Is this whine kind of a hit and miss thing, or will I definitely get it?
It's well worth it to help reduce wheel hop and it's not just the whitelines that will cause this.
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Old 02-20-2015, 12:18 AM   #19 (permalink)
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you'll definitely get it. simply due to the different material and design - eg. silicone filled main bushing vs Whiteline's solid elastomer construction.

the other reasons for the noise relate to the potential pinion angle/universal joint phasing issue. the ear bushing design is also different to oem
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Old 02-20-2015, 08:29 AM   #20 (permalink)
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For those of you who run whiteline/spl differential bushings: do you run motor mounts and/or transmission mounts as well?
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Old 02-20-2015, 08:52 AM   #21 (permalink)
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For those of you who run whiteline/spl differential bushings: do you run motor mounts and/or transmission mounts as well?
Yes
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Old 02-20-2015, 09:25 AM   #22 (permalink)
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You'll hear the ring 'n pinion spin w/performance oriented bushings. It's a given. This is why OEM use mushy rubber bushings, to quiet NVH.
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Old 02-20-2015, 09:50 AM   #23 (permalink)
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Why are people complaining about additional noise when you upgrade OEM parts to more performance-oriented parts (if not all out racing parts)?

I got my whiteline diff bushing kit installed about 5K miles ago. No complaints other than I wish I had gotten SPL solid bushings instead.

The Z is my DD btw and I don't even track it. Go buy a Tesla if you want a silent sports car
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Old 02-20-2015, 10:48 AM   #24 (permalink)
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I just didn't know it would make my z sound like it is an f1 car lmao
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Old 02-20-2015, 11:15 AM   #25 (permalink)
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I just didn't know it would make my z sound like it is an f1 car lmao
I doubt your Z sounds anything remotely like an F1 car
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Old 02-20-2015, 11:20 AM   #26 (permalink)
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Heavier diff fluid helps quiet it down some.
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Old 02-20-2015, 11:23 AM   #27 (permalink)
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yea thats what my mechanic was saying, i got gears installed and im changing the fluid next week after 500 miles.
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Old 03-22-2015, 08:41 PM   #28 (permalink)
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I want to bring this back up. My whine that was insane that I talked about before was due to the bearing on the main pinion slipping loose and rattling around. Apparently it is a rare occurrence by a defective bearing. Idk if that is the mechanic just covering his *** or not. But whatever I had to order a new bearing and install kit and have the job redone. Everything is good now and the whine from the bushing is barely anything. I only get a whine around 40-50 mph and again at 60mph. I like the noise though and it does add character to the car. All in all I am happy with the bushings now
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Old 03-23-2015, 07:32 AM   #29 (permalink)
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Cool. Thanks for sharing your experience. I should have my installation complete in the next two weeks.
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Old 03-23-2015, 01:20 PM   #30 (permalink)
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do you guys install the smaller bushing on top or bottom of the diff? i believe that makes a difference in the whine sound.
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