Diff Bushing upgrade

Quicksilvers

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.

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Mr. Clean

chalmene

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?

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~ 14" 370z Sport MT - Hotchkiss sway bars - SPL links - South Bend Stage 2 clutch/flywheel/CMAK ~

Quicksilvers

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.

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Mr. Clean

BettyZ

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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'14 MB Nismo | Boost Lab 6870 1.32 AR 553 HP / 471 ft.-lbs.
Betty Mods

chalmene

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

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~ 14" 370z Sport MT - Hotchkiss sway bars - SPL links - South Bend Stage 2 clutch/flywheel/CMAK ~

asht

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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Rusty

What are you trying to do with the torch? Burn the car down? A 2" diameter deep hole saw will cut the old bushing out. Then use a sawzall to cut the outer shell in 2 places. Then knock it out with a muffler tool. Takes me about 3 minutes to remove the old bushing. I've done 3 bushings for other people so far.

I have the SPL solid diff bushing, the Bell diff brace and the SPL sub-frame bushings. I did the diff bushing first. Really, it wasn't that noisy. Even with the solid diff bushing, diff brace, and solid sub-frame bushings. It's not that noticeable.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
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asht

No I took the subframe off first


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