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Old 07-17-2007, 11:31 PM   #1
holtzboy
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Default Rear end clunking noise still there after poly install

So I got a few things installed on my 240; dale poly bushing kit, ipd panhard rod, ipd torque rods. I thought this would cure my clunky rear end but anytime I accelerate from a stop, anytime I shift gears, anytime I am driving along and let off the gas then reapply the gas I get a clunk noise coming from the rear of the car. It does have a 3" exhaust but it has plenty of clearance all around from the sway, gas tank, and rear end parts. What else could be making the noise? I almost want to goto a dyno and have someone step on the gas so I can see whats banging around!
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1. 86 244DL- 1st car & Owned for 15 years, 25mm sways, iPd springs/fronts cut 1 coil, HDs, 2.25" exhaust, b-cam, EZK 117K, M47 swap, 100a intake side alt, No PS/AC
2. 93 945 Turbo - IPD sways, 3" turboback exhaust, intake, accumulator mod

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Old 07-17-2007, 11:42 PM   #2
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transmission mount? it could still be the exhaust.did you replace the front trailing arm bushings?
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Old 07-17-2007, 11:46 PM   #3
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I just replaced the tranny mount with a firm Meyle brand one. They did all the bushings possible in poly.
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Old 07-18-2007, 12:10 AM   #4
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center support bearing on the driveshaft. the rubber surround is prolly toast.
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Old 07-18-2007, 12:16 AM   #5
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Hmm hopefully. Guess I will wait it out because I have a Getrag 265 'kit' to put on I got from sethfc. I just need to get someone to modify/make me a fancy shifter so I can get rid of the sloppy bmw one.
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Old 07-18-2007, 12:21 AM   #6
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I've got an '86 and have a similar noise. Any time I load/unlead the drivetrain.
In other cars I've found it to be freezer bushings, but mine look fine. I replaced my center support bearing, didn't get rid of it though. Does anyoen have any other suggestions for my case?
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Old 07-18-2007, 01:33 AM   #7
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Originally Posted by Tamnakz View Post
I've got an '86 and have a similar noise. Any time I load/unlead the drivetrain.
In other cars I've found it to be freezer bushings, but mine look fine. I replaced my center support bearing, didn't get rid of it though. Does anyoen have any other suggestions for my case?

In some cases the universal joints on the 2 piece drive shafts wear out and become stiff. this can cause a pretty wicked vibration when climbing through the revs.
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Old 07-19-2007, 12:44 AM   #8
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There's no sort of vibration.

It's a solid clunk. If I neutralize, I get it. If I'm coasting in gear and give it gas, I get it. I've I shift, I get it.

Can't figure it out for the life of me.
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