C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ZF Transmission noise

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Old 08-28-2001, 02:40 AM
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No Ordinary 91
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Default ZF Transmission noise

Okay heres the deal i can drive the car all day and as long as it doesn't get up around 200+ deg everything is fine, once it goes past that when the fans kick on i get a clanking noise that is coming from underneith the car, sounds like from the bell housing or something on the tranny, anyone else get this noise? I am driving down to BG on thursday and don't want the tranny to crap out on me, since the clutch was replaced 11,000 miles ago i don't think it was that, i have heard it before but i maybe just getting parinoid because of the trip any suggestions?
Old 08-28-2001, 06:59 AM
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Yello95
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Default Re: ZF Transmission noise (91_Corvette)

You may need to have it put up in the air and check it out closer to see exactly where it is coming from... :yesnod: :cheers: :seeya
Old 08-28-2001, 11:34 AM
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No Ordinary 91
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Default Re: ZF Transmission noise (Yello95)

the only problem is it only does it sometimes and its usually when i am away from my house
Old 08-28-2001, 03:52 PM
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No Ordinary 91
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Default Re: ZF Transmission noise (91_Corvette)

no one else has ever had anything like this?
Old 08-28-2001, 06:32 PM
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Default Re: ZF Transmission noise (91_Corvette)

91_corvette
Your problem is definately the dual mass flywheel. There is no solution other than replace it. A lot of people have gone with a single mass (standard) flywheel in an attempt to save a few bucks, but most end up less than impressed with the increase in gear noise. This is a common problem that occures with these cars and it's not a cheap part to replace.
Post again if you require further info.
Pete.
Old 08-29-2001, 03:25 AM
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No Ordinary 91
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Default Re: ZF Transmission noise (COMPVET)

well, is it something that is going to cause problems or wear on the tranny? i have just recently paid $1400 to have the clutch replaced, and would really prefer to wait until it comes time to replace the clutch again to re-do the flywheel and everything all at once

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