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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,

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Old 07-04-2019, 10:18 PM   #1 (permalink)
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Default 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.
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Old 07-05-2019, 12:19 AM   #2 (permalink)
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if there is goo back there, its blown. I went with SPL.
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Old 07-05-2019, 03:48 AM   #3 (permalink)
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Originally Posted by madwi View Post
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
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Old 07-05-2019, 08:39 AM   #4 (permalink)
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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
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Old 07-05-2019, 01:53 PM   #5 (permalink)
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Energy suspension makes urathane bushings also.
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Old 07-05-2019, 08:45 PM   #6 (permalink)
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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.
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Old 07-07-2019, 01:35 AM   #7 (permalink)
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Originally Posted by Rusty View Post
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
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Old 07-07-2019, 01:55 AM   #8 (permalink)
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Quote:
Originally Posted by jchammond View Post
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.
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Old 07-07-2019, 02:12 AM   #9 (permalink)
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Quote:
Originally Posted by Rusty View Post
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
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Old 07-07-2019, 02:39 AM   #10 (permalink)
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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
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Old 07-07-2019, 06:46 AM   #11 (permalink)
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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.
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Old 07-07-2019, 06:48 AM   #12 (permalink)
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Quote:
Originally Posted by Rusty View Post
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!
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Old 07-07-2019, 09:22 PM   #13 (permalink)
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I’ve seen 8-1200 for brand new...pending on where you purchase it
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Old 07-07-2019, 11:08 PM   #14 (permalink)
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Quote:
Originally Posted by jchammond View Post
Is the hole tapered any
As I’ve stuck a couple in from the rear


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Old 07-07-2019, 11:21 PM   #15 (permalink)
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I have the Z1 bushing removal tool for sale. HMU! Made my upgrade very easy.
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