Leaking bushings??

Quicksilvers · 03-23-2018, 11:55 PM

Today I got under my 370Z to do an oil change on it and I was looking under the differential and I seen wet differential fluid dripping down my differential and it turns out my differential bushings failed and are leaking differential fluid.

What are the best brand poly urethane differential bushings for our 370z’s that you recommend installing? What other liquid filled bushings are there on our 370z’s that are commonly known to fail? What other bushings should I replace while I am in there?

HapaZ · 03-24-2018, 02:08 AM

The whiteline differential kit is pretty popular.

Rusty · 03-24-2018, 09:11 AM

The only other liquid filled bushings are the front lower control arm. The rear bushing. They don't often fail. Some pictures in my SPL thread.

The Complete SPL Front Suspension

Quicksilvers · 03-27-2018, 06:49 AM

^ I think this will help thanks .

Silly Rabbit · 03-27-2018, 01:51 PM

Common problem. I used Whiteline bushing kit.

Z1 has a bushing kits and a bushing tool too. Most people use a sawzall.

-ZS-Carpenter · 03-27-2018, 02:35 PM

on a '17 I would do Z1 subframe bushing collars while you have the rear apart. At that point it is a 20 min job

https://www.z1motorsports.com/transm...r-p-12015.html

Rusty · 03-27-2018, 03:09 PM

Quote:

Originally Posted by -ZS-Carpenter

on a '17 I would do Z1 subframe bushing collars while you have the rear apart. At that point it is a 20 min job

https://www.z1motorsports.com/transm...r-p-12015.html

Per bushings, if not longer.

beauz · 04-08-2018, 04:23 AM

Quote:

Originally Posted by Rusty

Per bushings, if not longer.

Nah mate. I loosened the 4 points and removed “w-brace” fitted the collars and torqued it all back up in about half hour. I did it at the point in time mentioned. Definitely recommend while you’ve got the back end apart. I also threw my VLSD in the bin at the same time

Rusty · 04-08-2018, 05:25 AM

Quote:

Originally Posted by beauz

Nah mate. I loosened the 4 points and removed “w-brace” fitted the collars and torqued it all back up in about half hour. I did it at the point in time mentioned. Definitely recommend while you’ve got the back end apart. I also threw my VLSD in the bin at the same time

I've read where a couple of people had a hard time getting the aluminum bushing insert into the oem rubber bushing. If it went that quick for you, then good.

JARblue · 03-27-2018, 03:10 PM

I bought the Whiteline poly diff bushing. Wish I had bought SPL solid bushing cause racecar

Rusty · 03-27-2018, 03:14 PM

Quote:

Originally Posted by JARblue

I bought the Whiteline poly diff bushing. Wish I had bought SPL solid bushing cause racecar

Quicksilvers · 03-28-2018, 02:43 AM

Quote:

Originally Posted by JARblue

I bought the Whiteline poly diff bushing. Wish I had bought SPL solid bushing cause racecar

The Whiteline poly urethane differential bushings fit but have a tighter fit than other aftermarket poly diff bushings. Great recommendation on the subframe bushing collars.

Quicksilvers · 03-31-2018, 01:27 AM

I just had the Whiteline poly urethane differential bushings installed on my Z they were a somewhat tighter fit but we will see how they do.

SonicVQ · 04-03-2018, 07:08 AM

This might be an option...

ColdFire · 04-04-2018, 01:45 AM

Mine did leak toward the driver side where the axle meets the differential. At that time I fixed it under warranty. But now I still feel like my diff is not working right as the car wiggles when the road surface changes ever slightly. It could be because i'm running r888 at the back and Cup 2 upfront.

Let me know if you feel the tail-wiggling symptoms.

03-23-2018, 11:55 PM	#1 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,038 Drives: 2017 370z Rep Power: 25464	Leaking bushings?? Today I got under my 370Z to do an oil change on it and I was looking under the differential and I seen wet differential fluid dripping down my differential and it turns out my differential bushings failed and are leaking differential fluid. What are the best brand poly urethane differential bushings for our 370z’s that you recommend installing? What other liquid filled bushings are there on our 370z’s that are commonly known to fail? What other bushings should I replace while I am in there?

03-24-2018, 09:11 AM	#3 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,415 Drives: 2011 Nismo GM 6M Rep Power: 2684438	The only other liquid filled bushings are the front lower control arm. The rear bushing. They don't often fail. Some pictures in my SPL thread. The Complete SPL Front Suspension __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

03-27-2018, 01:51 PM	#5 (permalink)
Silly Rabbit Track Member Join Date: Sep 2013 Location: Brookston, IN Age: 55 Posts: 683 Drives: '12 PW Touring Sport Rep Power: 619	Common problem. I used Whiteline bushing kit. Z1 has a bushing kits and a bushing tool too. Most people use a sawzall. __________________ NISMO R Tune Intakes \ Fast Intentions RHFC \ Borla CBE \ EcuTek Tuned\ SPL Camber Arms \ Powertrix Coilovers \ Swift Springs \ Avant Garde \ Wicked CAS \ Morimoto XB Halos \ Custom Fenders \ Hotchkis Sways \ NLP Splitter

03-27-2018, 02:35 PM	#6 (permalink)
-ZS-Carpenter A True Z Fanatic Join Date: Sep 2016 Location: Illinois Posts: 2,410 Drives: 13 370z 6MT Rep Power: 2684367	on a '17 I would do Z1 subframe bushing collars while you have the rear apart. At that point it is a 20 min job https://www.z1motorsports.com/transm...r-p-12015.html beauz likes this.

03-27-2018, 03:10 PM	#10 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 44 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684441	I bought the Whiteline poly diff bushing. Wish I had bought SPL solid bushing cause racecar 2011 Nismo#91 and Rusty like this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

03-24-2018, 02:08 AM	#2 (permalink)
HapaZ Base Member Join Date: Sep 2014 Location: NorCal Posts: 246 Drives: 2012 370z Base Coupe Rep Power: 11	The whiteline differential kit is pretty popular.

03-27-2018, 06:49 AM	#4 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,038 Drives: 2017 370z Rep Power: 25464	^ I think this will help thanks .

03-31-2018, 01:27 AM	#13 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,038 Drives: 2017 370z Rep Power: 25464	I just had the Whiteline poly urethane differential bushings installed on my Z they were a somewhat tighter fit but we will see how they do. Rusty likes this.

04-03-2018, 07:08 AM	#14 (permalink)
SonicVQ Base Member Join Date: Jan 2016 Location: Ontario Posts: 230 Drives: G37 Sport Rep Power: 6721	This might be an option...

04-04-2018, 01:45 AM	#15 (permalink)
ColdFire Base Member Join Date: Dec 2012 Location: Qatar Age: 35 Posts: 106 Drives: 13 370Z 6MT, 15 GT-R Rep Power: 369	Mine did leak toward the driver side where the axle meets the differential. At that time I fixed it under warranty. But now I still feel like my diff is not working right as the car wiggles when the road surface changes ever slightly. It could be because i'm running r888 at the back and Cup 2 upfront. Let me know if you feel the tail-wiggling symptoms. __________________ ColdFire's Build Journal Amuse \| Vossen CV3 \| KW V3 & More ; ) Last edited by ColdFire; 04-04-2018 at 01:47 AM.

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