SC430 - 2nd Gen (2001-2010)

Transmission Clank

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Old 10-27-13, 09:18 AM
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ShawnOk
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Default Transmission Clank

So I noticed something that is odd but what I always figured to be normal. I got to thinking and wondered if anyone has similar experience? My 2002 only has 27k miles so I'm hoping it's nothing out of the ordinary. I understand that the transmission will make some noise in shifting but I'm noticed a pretty solid "clank" when I shift especially from Park to Drive or Park to Reverse. Just wondering if other drivers have a similar experience? I remember my last car had a sort of "ratchet" sound in shifting and I've grown accustomed to this "clank" now, but just wondering of others have the same clank? If not normal, what should I look into? Also before it's recommended, I know it's not the brake caliper clips as the "clank" occurs before actual vehicle movement. Thanks in advance.
Old 10-27-13, 02:46 PM
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bcsc400
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My guess would be the transmission mount.
Old 10-27-13, 03:08 PM
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ShawnOk
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Originally Posted by bcsc400
My guess would be the transmission mount.
Is that normal or abnormal?
Old 10-27-13, 04:00 PM
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416tt
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Hey,,

do you use the foot brake? when stopping/parking

i find my transmission makes a clunk when i dont press the foot brake before i let go of the actual brake, which stops the car on a gear and when shifting out it makes a sound.. Specially on a slope it can louder then normal. My GX does same.. its best to use the parking/foot/hand brake, dont let it roll back and stop on the gear.. let me know if that seems to be the issue

Last edited by 416tt; 10-28-13 at 06:29 AM.
Old 10-28-13, 07:58 AM
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bcsc400
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Originally Posted by ShawnOk
Is that normal or abnormal?
The motor and trans mounts are very soft on these cars.
I had a trans clunk on my SC400 and replacing the mount solved the problem.
Old 10-28-13, 10:20 AM
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416tt
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Originally Posted by bcsc400
The motor and trans mounts are very soft on these cars.
I had a trans clunk on my SC400 and replacing the mount solved the problem.

hmm i have heard of the engine mount issue but not the transmission mount and i wouldnt be surprised if the mounts are bad anyways lol, all rubber mounts, bushings crap out really fast on this car... But ya the feeling i get is if i park on a slight slope, and not use the foot brake.. the car slightly moves back and stop on the gear.. Now when i try to shift out, its very slightly harder and thats when i hear a clunk type sound... it feels more in the transmission itself then outside... but stopping the car on footbrake solves that for me.. Its why i was wondering if ShawnOk experiences that..
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