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Old 01-12-2016, 05:28 PM   #1
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Default Help with my noise rear

I have a 90 Miata 137k.
The rear end groans as I take off or get crossed up. Sounds like its shifting subframe to body but I have double checked the bolts. No sign of movement there.
Is it just normal? I tightened my roll bar bolts, My shock mounts.
The a arms have poly but I don't think its that. I have a noise I get when the drivers side suspension moves up and down that is the poly bushings. That I am not worried about.

Its not something that happens every time but the first pull out of garage when I get crossed up on the alley. The alley is sloped into the middle so water flows there its a little steeper slope than your regular alley but nothing crazy.

I have changed diff bushings in the last month. Went with mazda comps there.
It made no change to the noise.

I don't know what kind of help yall can give me. Hard to diagnose some noise thru "the series of tubes" that is the internet.
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Old 01-14-2016, 03:20 PM   #2
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I don't know if this will help, but I had a creaking at take off that was fixed by switching to delrin door bushings. I really didn't think door bushings would create a noticeable change, but they did.
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Old 01-14-2016, 03:25 PM   #3
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Do you have a hardtop? Take your sway bar off and see if it still makes noise. Squirt some penetrating oil on stuff. You know, trouble shoot and figure it out.

Last edited by Itty; 01-14-2016 at 03:43 PM.
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Old 01-14-2016, 07:25 PM   #4
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Many peoples rear's make odd noises when they move about. And penetrating oil, while popular, does not alleviate this. Try a bit more fiber, some good fresh garlic, and less yeasty foods.
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Old 01-14-2016, 07:39 PM   #5
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Well played.
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Old 01-14-2016, 09:49 PM   #6
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Take it from a pro; don't use any warming lube in the rear.​
The sensation is... interesting at first, but you need things to be cool in the long run.
Check your u-joints. They last for a very long time in a miata, but they occasionally go bad.
I recently had some go bad, and I would hear a metallic clank when going into first.
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