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.

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.

jchammond · 04-04-2018, 02:05 AM

Too many differential bushings available at a low enough price,,,to even consider half azzin’
& squeezing silicone/glue into a rotted rubber cavaty.
Almost be like removing differential drain & fill plugs...then pumping grease in diff from bottom until it escapes from ck. port???
If you don’t have proper tools/skills,,,I’m sure there are members on forum who would lend a hand to perform proper fix.

Quicksilvers · 04-04-2018, 03:22 AM

Quote:

Originally Posted by ColdFire

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.

After the Whiteline differential bushing install the rear feels a lot more firm,positive,and planted to the ground. I would definitely replace your differential bushings because it is more of a question of when they will fail? No wiggling symptoms at all. Yes,with all the differential bushing kits available definitely do it right the first time and don’t screw up your installation I would just hate to have to do it twice. If my hands are free I would help out the Z community with a differential bushing installation.

03-23-2018, 11:55 PM	#1 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,039 Drives: 2017 370z Rep Power: 25462	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: 68 Posts: 34,861 Drives: 2011 Nismo GM 6M Rep Power: 2684436	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: 54 Posts: 683 Drives: '12 PW Touring Sport Rep Power: 618	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: 2684366	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	#8 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,449 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	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: 242 Drives: 2012 370z Base Coupe Rep Power: 10	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: 2,039 Drives: 2017 370z Rep Power: 25462	^ I think this will help thanks .

03-31-2018, 01:27 AM	#11 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,039 Drives: 2017 370z Rep Power: 25462	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	#12 (permalink)
SonicVQ Base Member Join Date: Jan 2016 Location: Ontario Posts: 230 Drives: G37 Sport Rep Power: 6720	This might be an option...

04-04-2018, 01:45 AM	#13 (permalink)
ColdFire Base Member Join Date: Dec 2012 Location: Qatar Age: 34 Posts: 106 Drives: 13 370Z 6MT, 15 GT-R Rep Power: 368	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.

04-04-2018, 02:05 AM	#14 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 57 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684394	Too many differential bushings available at a low enough price,,,to even consider half azzin’ & squeezing silicone/glue into a rotted rubber cavaty. Almost be like removing differential drain & fill plugs...then pumping grease in diff from bottom until it escapes from ck. port??? If you don’t have proper tools/skills,,,I’m sure there are members on forum who would lend a hand to perform proper fix. Rusty and wideglideleon like this. __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

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