Differential bushing

DrBacon · 07-04-2019, 11:18 PM

It would appear my diff bushing has blown, noticed some brownish fluid on my driver side exhaust pipe right under the bushing, however from the rear the bushing seems fine, going to try jacking up the car and see if I'm able to see the other side to confirm it has actually torn. Mainly if it has gone bad, i'm curious on the consensus on the best differential bushing to replace it with. Searching just brought up various different answers and from many years ago. Seems the top 3 are Z1, SPL and Whiteline.

madwi · 07-05-2019, 01:19 AM

if there is goo back there, its blown. I went with SPL.

jchammond · 07-05-2019, 04:48 AM

Quote:

Originally Posted by madwi

if there is goo back there, its blown. I went with SPL.

Even if it’s not blown; gonna benefit from replacing it.
I used the Z1 poly bushings on my last Z & they worked fine for me,,,lately peanut have been using the solid bushings...as SPL definitely is 1st class.

Just be prepared to do a little work or have a reputable shop perform this.
DIY threads are somewhere & may even be able to find video’s

Zyonara91 · 07-05-2019, 09:39 AM

Yeah, it's blown. Mine was starting to goop so I swapped it. SPL solid bushings are the way to go if you see heavy track usage. If you see track usage, if you track here and there and are more of a daily driver, I recommend this over the Z1 bushing.

https://www.whiteline.com.au/product..._number=KDT911

wideglideleon · 07-05-2019, 02:53 PM

Energy suspension makes urathane bushings also.

Rusty · 07-05-2019, 09:45 PM

I've installed 2 SPL bushings and 1 Z1 bushing. My 2 cents. The SPL was easier to install. If you install it yourself. Don't be like bunk and try to install the bushing from the rear. They are easier to install from the front.

jchammond · 07-07-2019, 02:35 AM

Quote:

Originally Posted by Rusty

I've installed 2 SPL bushings and 1 Z1 bushing. My 2 cents. The SPL was easier to install. If you install it yourself. Don't be like bunk and try to install the bushing from the rear. They are easier to install from the front.

Is the hole tapered any

As I’ve stuck a couple in from the rear

Rusty · 07-07-2019, 02:55 AM

Quote:

Originally Posted by jchammond

Is the hole tapered any

As I’ve stuck a couple in from the rear

The replacement bushings are a little shorter then what the hole is long. When you install from the front. You only have to push the bushing in until it's flush with the front of the hole. You will still have about 1/8 to 3/16 recess in the rear. If you install from the rear. You have to push the bushing that extra 1/8 to 3/16 to get it flush in the front. Why do the extra work? Plus less chance of getting hung up like bunk did. Installing from the front gives you more room to swing a BFH too.

jchammond · 07-07-2019, 03:12 AM

Quote:

Originally Posted by Rusty

The replacement bushings are a little shorter then what the hole is long. When you install from the front. You only have to push the bushing in until it's flush with the front of the hole. You will still have about 1/8 to 3/16 recess in the rear. If you install from the rear. You have to push the bushing that extra 1/8 to 3/16 to get it flush in the front. Why do the extra work? Plus less chance of getting hung up like bunk did. Installing from the front gives you more room to swing a BFH too.

Hopefully the next one I do will be with the whole subframe out from underneath car

Plan to give it the whole works when the moment arrives

OptionZero · 07-07-2019, 03:39 AM

Are 370Z subframes expensive?

On my 240, i just got a junked one, burned out all the bushings, and did all the SPL replacements at once

then swap the subframes and repeat

there was some wierd fitment **** because I had an S15 diff inside of an S13 pumpkin on an S14 with an auto-to-manual swapped drivetrain. that was fun

bunk · 07-07-2019, 07:46 AM

Quote:

Originally Posted by OptionZero

Are 370Z subframes expensive?

On my 240, i just got a junked one, burned out all the bushings, and did all the SPL replacements at once

then swap the subframes and repeat

there was some wierd fitment **** because I had an S15 diff inside of an S13 pumpkin on an S14 with an auto-to-manual swapped drivetrain. that was fun

You can get a used subframe for less than 500 bucks. I was sourcing them just to cover my bases.

bunk · 07-07-2019, 07:48 AM

Quote:

Originally Posted by Rusty

I've installed 2 SPL bushings and 1 Z1 bushing. My 2 cents. The SPL was easier to install. If you install it yourself. Don't be like bunk and try to install the bushing from the rear. They are easier to install from the front.

Everything went pretty well til that burr. I shouldve been more careful about those!

jchammond · 07-07-2019, 10:22 PM

I’ve seen 8-1200 for brand new...pending on where you purchase it

Zingston · 07-08-2019, 12:08 AM

Quote:

Originally Posted by jchammond

Is the hole tapered any

As I’ve stuck a couple in from the rear

dedoom · 07-08-2019, 12:21 AM

I have the Z1 bushing removal tool for sale. HMU! Made my upgrade very easy.

07-04-2019, 11:18 PM	#1 (permalink)
DrBacon Enthusiast Member Join Date: Nov 2016 Location: Washington Posts: 285 Drives: 2014 Nismo Rep Power: 27365	Differential bushing It would appear my diff bushing has blown, noticed some brownish fluid on my driver side exhaust pipe right under the bushing, however from the rear the bushing seems fine, going to try jacking up the car and see if I'm able to see the other side to confirm it has actually torn. Mainly if it has gone bad, i'm curious on the consensus on the best differential bushing to replace it with. Searching just brought up various different answers and from many years ago. Seems the top 3 are Z1, SPL and Whiteline.

07-05-2019, 09:39 AM	#4 (permalink)
Zyonara91 Enthusiast Member Join Date: Jun 2016 Location: GTA Posts: 368 Drives: 2010-Red-6spd-S/T Rep Power: 15756	Yeah, it's blown. Mine was starting to goop so I swapped it. SPL solid bushings are the way to go if you see heavy track usage. If you see track usage, if you track here and there and are more of a daily driver, I recommend this over the Z1 bushing. https://www.whiteline.com.au/product..._number=KDT911 __________________ 2FT3PDLZ

07-05-2019, 09:45 PM	#6 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,218 Drives: 2011 Nismo GM 6M Rep Power: 2684438	I've installed 2 SPL bushings and 1 Z1 bushing. My 2 cents. The SPL was easier to install. If you install it yourself. Don't be like bunk and try to install the bushing from the rear. They are easier to install from the front. Jimbo370 likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

07-07-2019, 03:39 AM	#10 (permalink)
OptionZero A True Z Fanatic Join Date: Apr 2011 Location: Sacramento Posts: 3,235 Drives: 15 370Z Nismo 6MT Rep Power: 214100	Are 370Z subframes expensive? On my 240, i just got a junked one, burned out all the bushings, and did all the SPL replacements at once then swap the subframes and repeat there was some wierd fitment **** because I had an S15 diff inside of an S13 pumpkin on an S14 with an auto-to-manual swapped drivetrain. that was fun __________________ OptionZero Build Thread

07-07-2019, 10:22 PM	#13 (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	I’ve seen 8-1200 for brand new...pending on where you purchase it __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

07-05-2019, 01:19 AM	#2 (permalink)
madwi A True Z Fanatic Join Date: Sep 2012 Location: West Michigan Posts: 31,410 Drives: Granma red Z Rep Power: 2684429	if there is goo back there, its blown. I went with SPL.

07-05-2019, 02:53 PM	#5 (permalink)
wideglideleon Track Member Join Date: Apr 2015 Location: Tucson AZ Posts: 569 Drives: SC 09 370Z LG 7AT Rep Power: 64085	Energy suspension makes urathane bushings also.

07-08-2019, 12:21 AM	#15 (permalink)
dedoom Base Member Join Date: Sep 2015 Location: Burbank Posts: 223 Drives: '09 370z Touring 6MT Rep Power: 10	I have the Z1 bushing removal tool for sale. HMU! Made my upgrade very easy. jchammond likes this.

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