Rear Differential Bushing Leak

bunk

Drive shafts dont leak...can you ask your buddy what exactly was wrong with it?

Just do a search on Z1 for 370z diff bushing. Youll even see the type of diff fluid to use. If you REALLY want to do more than just maintenance, you can get a finned diff cover for better cooling and slap on a diff brace..

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redondoaveb

Whiteline makes a great diff bushing set also.

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BossJ

Yea - I'll check with him tomorrow. I"m sure I just didn't get something right on it and I'm mixing the drive shaft issue up with the bushing issue.

I'll check into those diff parts also - once I talk to the performance shop that's going to do the install.

Appreciate you taking the time to help!

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2016 Pearl White 370Z Nismo (6ma) || Z1 CAI || Greddy GT X || FI Resonated Test Pipes || Ported Manifolds || Fuel Pump: aem50-1200 || 1050cc Fuel Injectors || E85 || RJM Performance Clutch || ECUTECH - SpecialtyZ (Seb)

Rusty

That big old bushing is filled with silicone, not grease. And it's nasty. When that bushing goes bad. It normally leaks down the diff cover. The bushing has 2 chambers filled with the silicone. Only one chamber normally lets go.

I've installed 3 diff bushings so far. 2 SPL's and 1 Z1. The SPL's were easier to install. They're a solid bushing, where the Z1 is poly. The poly moves around during installation. The poly transmits less vibrations.

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BossJ

Alright so yeah - Silicone leaked down my Diff - thought it was diff fluid.

So Rusty - which bushing do you suggest? If install isn't an issue?

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2016 Pearl White 370Z Nismo (6ma) || Z1 CAI || Greddy GT X || FI Resonated Test Pipes || Ported Manifolds || Fuel Pump: aem50-1200 || 1050cc Fuel Injectors || E85 || RJM Performance Clutch || ECUTECH - SpecialtyZ (Seb)

Rusty

I like the SPL's. But that's me.

Question. You do have the black streaks on your diff cover? Correct? The reason I ask. Some have blown gear lube out of the breather hose. The end of the breather hose is on the driver side of the sub-frame. So, it will drip on the exhaust on that side.

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BossJ

yeah - here's what it looks like

Attached Images

	Annotation 2020-04-27 203527.jpg (66.8 KB, 55 views)
	Annotation 2020-04-27 203600.jpg (66.5 KB, 44 views)

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2016 Pearl White 370Z Nismo (6ma) || Z1 CAI || Greddy GT X || FI Resonated Test Pipes || Ported Manifolds || Fuel Pump: aem50-1200 || 1050cc Fuel Injectors || E85 || RJM Performance Clutch || ECUTECH - SpecialtyZ (Seb)

Rusty

Yep, diff bushing.

To change to bushing out. You're looking at at about 6 to 8 hrs of work. Depending on skill set. To drop the diff. You got the exhaust, drive shaft, axle shafts, frame bracing, sway bar. It's best to work from the front of the sub-frame. Install the new bushing from the front. Push it all the way in. Until the front of the bushing is flush with the sub-frame. This should get you where the diff should be. Bunk had to drop his diff a second time, and push the bushing a little deep to get the front 2 bolt holes to align up.

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