Nissan 370Z Forum

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-   -   Diff Bushing upgrade (http://www.the370z.com/engine-drivetrain/132417-diff-bushing-upgrade.html)

chalmene 11-15-2019 08:51 PM

Diff Bushing upgrade
 
How many here have gone with urethane diff bushings? What were your experiences? Did you experience more vibration as a result? What performance benefits did you experience?

Looking at this set: https://www.z1motorsports.com/z1-pro...t-p-10356.html

asht 11-15-2019 08:54 PM

Quote:

Originally Posted by chalmene (Post 3889684)
How many here have gone with solid/heavy duty diff bushings? What were your experiences? Did you experience more vibration as a result? What performance benefits did you experience?



Looking at this set: https://www.z1motorsports.com/z1-pro...t-p-10356.html



Don’t.

I’ve done solid bushes with rose jointed suspension on an S13. The noise is horrendous. It handles well, but it is awful noise


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chalmene 11-15-2019 09:32 PM

Quote:

Originally Posted by asht (Post 3889685)
Don’t.

I’ve done solid bushes with rose jointed suspension on an S13. The noise is horrendous. It handles well, but it is awful noise


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Which type did you run? The ones I linked are urethane, any experience with those?

asht 11-15-2019 09:34 PM

Hard race


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BettyZ 11-15-2019 11:09 PM

Lots of people here have gone with the Z1 urethane diff bushings and reported no big increase in NVH.

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SouthArk370Z 11-16-2019 12:28 AM

:shakes head: Go to your favorite web search and type in "urethane bushing site:the370z.com" (site:the370z.com limits the search to this site). Add -christ to omit hits on a sig that has urethane in it.

Quicksilvers 11-16-2019 01:44 AM

Quote:

Originally Posted by chalmene (Post 3889684)
How many here have gone with urethane diff bushings? What were your experiences? Did you experience more vibration as a result? What performance benefits did you experience?

Looking at this set: https://www.z1motorsports.com/z1-pro...t-p-10356.html

Indeed if you search you will find a lot of info on this topic. Depends on what your tolerance to noise is? What do you use your Z for? If your Z is mainly for street duty I recommend the urethane differential bushings as excessive noise from solid differential bushings used for street duty can be annoying to some. If you track your Z at all definitely solid differential bushings would be the choice. I recommend the Whiteline urethane differential bushings I found them to be quite durable in my experience. If you install differential bushings don’t forget to get the rear differential bushing removal tool you will need it. Also this is a great time to change your differential fluid.

chalmene 11-16-2019 06:27 AM

Quote:

Originally Posted by Quicksilvers (Post 3889722)
Indeed if you search you will find a lot of info on this topic. Depends on what your tolerance to noise is? What do you use your Z for? If your Z is mainly for street duty I recommend the urethane differential bushings as excessive noise from solid differential bushings used for street duty can be annoying to some. If you track your Z at all definitely solid differential bushings would be the choice. I recommend the Whiteline urethane differential bushings I found them to be quite durable in my experience. If you install differential bushings don’t forget to get the rear differential bushing removal tool you will need it. Also this is a great time to change your differential fluid.

Thanks! I don't track the vehicle, it is my daily at the moment and my driving is spirited whenever I have the opportunity. I most likely won't be doing the install myself. Should I expect vibration with the urethane bushings also? In what form would vibration manifest itself with them? Cabin noise? Vibration felt in the shifter or other controls?

JARblue 11-16-2019 07:13 AM

I've had the Whiteline poly diff bushing installed for the last 80K miles. There's still some slop back there but no issues on the street. SPL solid bushings are sitting in the garage awaiting install for track mode.

asht 11-16-2019 07:41 AM

White line was mine. I did the anti roll bars as well. Diff noise was terrible but fun also. Don’t go for rose joints


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Quicksilvers 11-16-2019 08:09 AM

Quote:

Originally Posted by chalmene (Post 3889732)
Thanks! I don't track the vehicle, it is my daily at the moment and my driving is spirited whenever I have the opportunity. I most likely won't be doing the install myself. Should I expect vibration with the urethane bushings also? In what form would vibration manifest itself with them? Cabin noise? Vibration felt in the shifter or other controls?

If you can’t or don’t have the means of doing the rear differential bushing install yourself take your Z to a shop or Nissan dealership service department you trust to do the install for you. This is an ideal job for a transmission/driveline shop. Depends on if you are on stock suspension or not will also depend on what noises you will hear from your suspension as well. Also consider the streets/highways you are driving on as well. Most of all brand polyurethane differential bushings for our Z’s have the same characteristics and noise level as the Genuine Nissan OEM rubber bushings don’t be afraid to install them and polyurethane bushings are also more durable than rubber bushings in turn they will last a lot longer. Performance wise it will improve with the polyurethane differential bushings but you will still have some play in the rear. I have been running solid differential bushings on every Z I have had only really notested noise with the solid differential bushings the polyurethane differential bushings are overall quiet.

BettyZ 11-16-2019 11:22 AM

Quote:

Originally Posted by Quicksilvers (Post 3889751)
If you can’t or don’t have the means of doing the rear differential bushing install yourself take your Z to a shop or Nissan dealership service department you trust to do the install for you. This is an ideal job for a transmission/driveline shop. Depends on if you are on stock suspension or not will also depend on what noises you will hear from your suspension as well. Also consider the streets/highways you are driving on as well. Most of all brand polyurethane differential bushings for our Z’s have the same characteristics and noise level as the Genuine Nissan OEM rubber bushings don’t be afraid to install them and polyurethane bushings are also more durable than rubber bushings in turn they will last a lot longer. Performance wise it will improve with the polyurethane differential bushings but you will still have some play in the rear. I have been running solid differential bushings on every Z I have had only really notested noise with the solid differential bushings the polyurethane differential bushings are overall quiet.

Do the install yourself. If you're not mechanically inclined that's okay. You'll gain lots of new tools and knowledge out of the experience.

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chalmene 11-16-2019 11:57 AM

Quote:

Originally Posted by BettyZ (Post 3889772)
Do the install yourself. If you're not mechanically inclined that's okay. You'll gain lots of new tools and knowledge out of the experience.

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I actually am mechanically inclined. Have a bad back and neck, so I choose my battles these days lol :icon17:

asht 12-14-2019 01:47 PM

Quote:

Originally Posted by BettyZ (Post 3889772)
Do the install yourself. If you're not mechanically inclined that's okay. You'll gain lots of new tools and knowledge out of the experience.

Sent from my SM-G955U using Tapatalk



You need an Acetylene torch to cut the old
Bushes out. If you like refinement don’t do the Diff bushes. If you like the whine of a Hewland race box do it, because it grinds and whines like a rally car . I regret going solid bushes for a daily driver


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Spooler 12-14-2019 03:33 PM

I have the Z1 poly bushings and like them. No gear whine at all. My subframe however has solid NISMO bushings. I also have a modified Bellworks diff brace. I did get some noise from that.


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