whiteline diff bushing gear noise
 

I was wondering if anyone has gear whine on acceleration with the whiteline diff bushings. I have pulled the differential multiple times to change backlash and the noise doesnt change. Backlash is in the center of spec. Last thing to change would be the pinion bearings.

These bushings are a lot more firm that the OEM silicone-filled bushes and transmit noticeably more noise than the OEM bushes.

I am not surprised you've noticed more noise, I certainly have.

agreed. i get a knock on some shifts too but it's only been 20km since installing these over the past two nights.

at least the slop is gone!

This gear whine is only under throttle and starts at about 25 mph. Sounds like a siren, gets higher in pitch with speed .Can only hear it with radio off and is speed based, not rpm. Those with these bushings do you have these symptoms?

It's normal. I have the SPL ones, probably 3 times worse than Whiteline in noise, but 3 times better in performance.

Yes I have the exact same noise. Glad I am not the only one.

Is it possible it's not tire noise?

I have it to...I asked Seb about it not to long after the install and he said it's normal. I hardly even notice it now. Kind of like all the other 101 noises the car makes and I know each one of them.

#becauseracecar

Does the noise quiet down as the bushing get worn in?

I have about 4-5k miles of hard driving and I haven't noticed any change. Doesn't really bug me though. The throwout bearing sound our cars make is 20x more annoying IMO

My Whiteline bushings have actually become quieter after a few thousand K's.:driving:

Yea I just picked my car up from the mechanic and he said the noise is normal and should quiet down after the bushings get worn in. My god it's like a supercharger is on my diff lmao

ive had my bushings for over 4mths now, so about 7000km and it's still making noise. my ears have gotten used to it and it adds a nice character to the car.

however, i did reverse the ear bushings and that itself made a massive difference

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?

I love the sound the SPL bushing makes except when it whines right at the common speed limit around here, 40 mph. :nutswinger:

The safe thing is to expect it will make noise. :driving:

It's well worth it to help reduce wheel hop and it's not just the whitelines that will cause this.

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

For those of you who run whiteline/spl differential bushings: do you run motor mounts and/or transmission mounts as well?

Yes

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.

:iagree:

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 :twocents:

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 :stirthepot:

Heavier diff fluid helps quiet it down some.

yea thats what my mechanic was saying, i got gears installed and im changing the fluid next week after 500 miles.

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

Cool. Thanks for sharing your experience. I should have my installation complete in the next two weeks.

do you guys install the smaller bushing on top or bottom of the diff? i believe that makes a difference in the whine sound.

Is the install difficult?

removing the rear bushing can be a serious PITA.

W00+? The bushings are OUTSIDE the rear diff carrier. The BEARINGs are inside the rear diff carrier. The guy w/the WHINE problem had a re-used BEARING fail on him....He didn't say if it was the front or rear pinion bearing....
Any IDI0+ can tell where the subframe bushing and two "ear" diff bushings go...:rolleyes:

I bought a brand new bearing using the bearing a seal kit from Z1. I believe it was the front main pinion bearing because the drive shaft was also moving, could be wrong though. so yea the bearing was new so I probably just got charged for a improper install, but it's all fine now and I don't really feel like complaining

to bring this thread back to life - as I am going to install some Whiteline diff bushings this weekend.

The G37 guys were saying to install the front ear bushings reverse of the instructions with the Thick bushings on top and thin on bottom - they say the pinion angles are more correct this way - thus lessening the drive train noises.

Anyone else concur? :driving:

Exactly what I asked a few posts above, the whine is cause depending on how you install the bushings. There is a thick one and a thin one. Where did everyone put either one on the diff? No one answered the question .

It's going to whine because it's solid...

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Ok so got my Whiteline bushings, installed, thick on top thin on the bottom. .. and G37 guys are correct, very similar to stock. And the rear is more planted...that Factory stock rear bushing was a nightmare to get out.

thank you for being the first one on here to confirm this.

I can confirm that it makes a big difference on how you install the bushings. I installed them by the install instructions and got a whine at 20, 40 and 60... So I researched and came across this post... So I reversed the install... And all the noise is gone.... My car is back to normal... I know this is an old post... Just an FYI:happydance: