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2003-2009 Nissan 350Z

Rear end feels loose/unstable going over bumps

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Old 09-01-2017, 07:32 AM
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Michael6593
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Default Rear end feels loose/unstable going over bumps

I've noticed that the rear end of my 350 feels loose/unstable when I go over bumps on the highway. It feels like the rear end kicks out and then it corrects itself. It also feels pretty bad on a bumpy road going 25-35 mph. The car feels stable on a smooth road, it doesn't seem to walk around at all. Any ideas of what might cause this?
Old 09-01-2017, 08:09 AM
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iideadeyeii
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No, jack it up and look for bad bushings/anything that has play
Old 09-01-2017, 11:19 AM
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WYZIWYG
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Rear subframe bushing probably needs to be replaced. If you see leaking black greasy stuff near it, that's probably it.

Plenty of threads out there already on what to buy and how to DIY if you're so inclined.

GL
Old 09-01-2017, 04:14 PM
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MicVelo
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Good suggestions thus far.

Would ask though, can you specify more details? Mileage, modifications to suspension, etc. Could simply be bad shocks, diff bushing, or in the case of something modified, improperly installed/torqued/or just came loose....

And that's relevant information that any/everyone asking for assistance should include in their posts for help.
Old 09-01-2017, 06:27 PM
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Michael6593
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124k miles. Completely stock. I did check the rear diff bushing and it does look blown.
Old 09-01-2017, 07:17 PM
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MicVelo
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Originally Posted by Michael6593
124k miles. Completely stock. I did check the rear diff bushing and it does look blown.
Shocks ever been changed? If not, they're about 75,000 miles overdue.
Old 09-01-2017, 07:28 PM
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CK_32
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Check your shocks and springs.

Check your bushings.

Check your axles.

Check your wheels and hubs.

Check your control arms.

Then your sway bar.

And check everything they touch or connect to. If you see oil, dirt, excess grease, charcoal looking piles. Something is blown, leaking or bad.
Old 09-01-2017, 11:27 PM
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terrasmak
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Alignment , tire wear and shocks are what neould look at
Old 09-02-2017, 08:05 AM
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dboyzalter
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Part out... How much for the lug nuts?
Old 09-03-2017, 03:54 PM
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Michael6593
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haha thanks for all the help guys. I'm definitely going to change out my rear diff bushing. Then im assuming the car is on the factory shocks... So im going to change those and then get an alignment. Im also pretty sure the front compression arm bushings are shot too. The car clicks/clunks when braking hard and when turning slow. Oh the joy of having a high mileage car.
Old 09-05-2017, 09:18 AM
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iideadeyeii
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124k miles is not high mileage
Old 09-05-2017, 09:37 AM
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CK_32
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While you do that tell them about your issue. Have them take a look if you are not competent enough to take a look for your self.

Hopefully they should be able to see underlining visual issues since they specialize with alignment and repair.
Old 09-28-2017, 08:30 PM
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djnekkon
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after all these, all you'll be needing is a ****.....I kid I kid

Last edited by djnekkon; 09-28-2017 at 08:32 PM.




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