Knocking sound coming from upper rear.

firefly890 · 12-18-2018, 06:57 PM

I had knocking in the front and rear suspension. The previous owner had it slammed and I took it back to stock Nismo suspension. I replaced the front end links and that cured the front. I just today, replaced the rear end links and it did not cure the knocking. It sounds like it's coming from the top. Any little bump causes knocking. Any thoughts?

SouthArk370Z · 12-18-2018, 08:03 PM

The top bushing may be shot. Several threads on this site.

fryzia23 · 12-18-2018, 09:19 PM

I would check rear sway bar bushing. But if it was slammed then it can be couple parts that could fail or even something loose not fully tightened.

firefly890 · 12-18-2018, 09:43 PM

Thanks. I'll check it all.

Darketch · 12-18-2018, 11:19 PM

If it happens when you take off or change gears, you may need to grease your splines under your rear axel nuts....also threads on this site.

firefly890 · 12-21-2018, 07:18 PM

Just sounds like the top is knocking, just under the plastic cover in the back.

Rusty · 12-22-2018, 03:22 PM

Check the bushings on top of the shock.

Jack the rear up using jack stands. Then put the jack under the spring bucket on the control arm. Jack that up to take pressure off of the shock. If the top bushing is bad. You should feel movement when you move the shock with your hand.

firefly890 · 12-31-2018, 02:32 AM

I replaced the top bushing. It stopped the knocking. I was able to move the old bushing within the metal casing with my finger. I could feel grit in there as well.

12-18-2018, 06:57 PM	#1 (permalink)
firefly890 Base Member Join Date: May 2018 Location: NC Posts: 4 Drives: 2013 Nismo Rep Power: 7	Knocking sound coming from upper rear. I had knocking in the front and rear suspension. The previous owner had it slammed and I took it back to stock Nismo suspension. I replaced the front end links and that cured the front. I just today, replaced the rear end links and it did not cure the knocking. It sounds like it's coming from the top. Any little bump causes knocking. Any thoughts?

12-18-2018, 08:03 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	The top bushing may be shot. Several threads on this site. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

12-18-2018, 09:43 PM	#4 (permalink)
firefly890 Base Member Join Date: May 2018 Location: NC Posts: 4 Drives: 2013 Nismo Rep Power: 7	appreciated Thanks. I'll check it all.

12-18-2018, 11:19 PM	#5 (permalink)
Darketch Enthusiast Member Join Date: May 2013 Location: Virginia Posts: 429 Drives: 14 NISMO #292 Rep Power: 12	If it happens when you take off or change gears, you may need to grease your splines under your rear axel nuts....also threads on this site. __________________ STILLEN G3 \|\| F. I. CF Non-Resonated CBE

12-22-2018, 03:22 PM	#7 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,184 Drives: 2011 Nismo GM 6M Rep Power: 2684437	Check the bushings on top of the shock. Jack the rear up using jack stands. Then put the jack under the spring bucket on the control arm. Jack that up to take pressure off of the shock. If the top bushing is bad. You should feel movement when you move the shock with your hand. wideglideleon likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html Last edited by Rusty; 12-22-2018 at 03:28 PM.

12-18-2018, 09:19 PM	#3 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	I would check rear sway bar bushing. But if it was slammed then it can be couple parts that could fail or even something loose not fully tightened.

12-21-2018, 07:18 PM	#6 (permalink)
firefly890 Base Member Join Date: May 2018 Location: NC Posts: 4 Drives: 2013 Nismo Rep Power: 7	Just sounds like the top is knocking, just under the plastic cover in the back.

12-31-2018, 02:32 AM	#8 (permalink)
firefly890 Base Member Join Date: May 2018 Location: NC Posts: 4 Drives: 2013 Nismo Rep Power: 7	Fixed I replaced the top bushing. It stopped the knocking. I was able to move the old bushing within the metal casing with my finger. I could feel grit in there as well. Rusty, wideglideleon and ZontheRocks like this.

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