Quiafe lsd for 7AT, whine?

shadow85 · 04-05-2020, 12:05 AM

I have had the quaife diff on my 7AT TT for some time now. It has always exhibited some whining since day 1, but I never looked into because I was told it is normal.

Now someone else here has told me Quaife should not whine at all when installed properly.

So my question is, does anyone else here have a Quaife LSD and does yours whine? Should I take ot back to the shop and get them to install it properly?

BGTV8 · 04-05-2020, 04:09 PM

Did you upgrade diff bushes at the same time ?

That could be increased NVH that you are hearing.

I had a Quaife in my 3.7:1 diff that was quiet, but since installing 3.9:1 gears repalcing the OEM buses it is noticeably noisy but has covered 12k klics and not getting any worse, so I just turn the stereo up a bit.

The KAZZ in my 4.08:1 diff with the same bushes is less noisy.

So, it could be increased NVH from the bushes if they have been replaced, or it could be diff shims on pinion or crown-wheel which is up to the shop that installed the diff to correct if it is bad enough.

2011 Nismo#91 · 04-05-2020, 05:12 PM

They are supposed to whine a bit.

shadow85 · 04-05-2020, 06:28 PM

Yes I had whiteline bushes installed at the same time.

Strange, another guy with the quaife said his does not whine and is not suppose to.

He told me his mechanic installed it and it did whine, but then got him to remove and re-install it properly and it does not whine anymore.

BGTV8 · 04-06-2020, 02:39 AM

Depends on how loud it is. A properly shimmed CWP with a "good pattern" won't whine, so one that is noisy is not 100%. The EOM bushes are fluid filled (and are devils spawn) to damp out natural vibrations ........ change to hard bushes to will increase NVH.

Challenge is to establish whether you are hearing NVH or gear whine because the CWP is not meshing perfectly.

If you want to spend the coin, get it set up again.

If it is not getting worse, turn the stereo up a bit ..........

Your call

jchammond · 04-06-2020, 02:43 AM

Mine doesn’t whine any, installed in an Auto with 3.357 gears.
Was plug & play, backlash checked the same.

jchammond · 04-06-2020, 02:46 AM

Remove oil drain plug & collect small sample, then hold your finger over it.
Have someone with you to inspect magnetic & wipe it off good.
You don’t want to be filing gears.
I used the Motul Competition 75/140 in mine.

SchumiF399 · 04-06-2020, 01:37 PM

Mine whines a little on decel. Also a 7AT. Most noticeably from 50-40mph. Nothing too intrusive.

Rusty · 04-06-2020, 04:27 PM

Shadow. Does it whine on coast, on the gas, or all the time?

Cj7379 · 04-07-2020, 09:18 PM

Also have Quafie, no whine on mine.

Quicksilvers · 04-10-2020, 05:44 AM

Seeing how the Quaife differential is a Torsen type (gear driven) differential it should not make noise and is one of the quiet aftermarket differentials you could possibly choice. Something obviously is not right when exactly is your Quaife differential making noise? What differential fluid are you using? Engagement with this differential is not harsh and technically requires no break in period.

Rusty · 04-10-2020, 08:02 AM

Quote:

Originally Posted by Quicksilvers

Seeing how the Quaife differential is a Torsen type (gear driven) differential it should not make noise and is one of the quiet aftermarket differentials you could possibly choice. Something obviously is not right when exactly is your Quaife differential making noise? What differential fluid are you using? Engagement with this differential is not harsh and technically requires no break in period.

The unit it's self makes no noises unless it's broke. The whine is from the ring and pinion. Either too tight or too loosen. Have to check backlash and toe pattern.

Quicksilvers · 04-10-2020, 04:59 PM

Quote:

Originally Posted by Rusty

The unit it's self makes no noises unless it's broke. The whine is from the ring and pinion. Either too tight or too loosen. Have to check backlash and toe pattern.

Not properly setting pinion depth will contribute to noise aside from a improper backlash setting.

Rusty · 04-10-2020, 05:15 PM

Quote:

Originally Posted by Quicksilvers

Not properly setting pinion depth will contribute to noise aside from a improper backlash setting.

That's where you do a pattern check. That will show you where the pinion is sitting at on the ring gear.

I've done my share of doing gear sets.

Quicksilvers · 04-10-2020, 05:40 PM

Quote:

Originally Posted by Rusty

That's where you do a pattern check. That will show you where the pinion is sitting at on the ring gear.

I've done my share of doing gear sets.

I’ve been installing all my ring and pinion/differentials enough to know Captain Picard palmface your our self.

Clearly the OP installation was screwed up. If the OP can not correct this himself then he should have a shop fix this for him.

04-05-2020, 12:05 AM	#1 (permalink)
shadow85 Track Member Join Date: Jul 2015 Location: South Australia, Austra Posts: 921 Drives: 15' 370Z A/T AMM TT Rep Power: 26	Quiafe lsd for 7AT, whine? I have had the quaife diff on my 7AT TT for some time now. It has always exhibited some whining since day 1, but I never looked into because I was told it is normal. Now someone else here has told me Quaife should not whine at all when installed properly. So my question is, does anyone else here have a Quaife LSD and does yours whine? Should I take ot back to the shop and get them to install it properly?

04-06-2020, 02:43 AM	#6 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Mine doesn’t whine any, installed in an Auto with 3.357 gears. Was plug & play, backlash checked the same. __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

04-06-2020, 02:46 AM	#7 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Remove oil drain plug & collect small sample, then hold your finger over it. Have someone with you to inspect magnetic & wipe it off good. You don’t want to be filing gears. I used the Motul Competition 75/140 in mine. __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

04-06-2020, 04:27 PM	#9 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,499 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Shadow. Does it whine on coast, on the gas, or all the time? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

04-10-2020, 05:44 AM	#11 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,038 Drives: 2017 370z Rep Power: 25464	Seeing how the Quaife differential is a Torsen type (gear driven) differential it should not make noise and is one of the quiet aftermarket differentials you could possibly choice. Something obviously is not right when exactly is your Quaife differential making noise? What differential fluid are you using? Engagement with this differential is not harsh and technically requires no break in period. __________________ Mr. Clean

04-05-2020, 04:09 PM	#2 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,516 Drives: 09 Nissan 370Z M6 Rep Power: 39974	Did you upgrade diff bushes at the same time ? That could be increased NVH that you are hearing. I had a Quaife in my 3.7:1 diff that was quiet, but since installing 3.9:1 gears repalcing the OEM buses it is noticeably noisy but has covered 12k klics and not getting any worse, so I just turn the stereo up a bit. The KAZZ in my 4.08:1 diff with the same bushes is less noisy. So, it could be increased NVH from the bushes if they have been replaced, or it could be diff shims on pinion or crown-wheel which is up to the shop that installed the diff to correct if it is bad enough.

04-05-2020, 05:12 PM	#3 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,412 Drives: slowly Rep Power: 40570	They are supposed to whine a bit.

04-05-2020, 06:28 PM	#4 (permalink)
shadow85 Track Member Join Date: Jul 2015 Location: South Australia, Austra Posts: 921 Drives: 15' 370Z A/T AMM TT Rep Power: 26	Yes I had whiteline bushes installed at the same time. Strange, another guy with the quaife said his does not whine and is not suppose to. He told me his mechanic installed it and it did whine, but then got him to remove and re-install it properly and it does not whine anymore.

04-06-2020, 02:39 AM	#5 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,516 Drives: 09 Nissan 370Z M6 Rep Power: 39974	Depends on how loud it is. A properly shimmed CWP with a "good pattern" won't whine, so one that is noisy is not 100%. The EOM bushes are fluid filled (and are devils spawn) to damp out natural vibrations ........ change to hard bushes to will increase NVH. Challenge is to establish whether you are hearing NVH or gear whine because the CWP is not meshing perfectly. If you want to spend the coin, get it set up again. If it is not getting worse, turn the stereo up a bit .......... Your call

04-06-2020, 01:37 PM	#8 (permalink)
SchumiF399 Base Member Join Date: Apr 2018 Location: California Posts: 38 Drives: 2012 370z Rep Power: 8	Mine whines a little on decel. Also a 7AT. Most noticeably from 50-40mph. Nothing too intrusive.

04-07-2020, 09:18 PM	#10 (permalink)
Cj7379 Base Member Join Date: Nov 2017 Location: Wisconsin Posts: 38 Drives: 2017 370z Rep Power: 60	Also have Quafie, no whine on mine.

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