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

ZF-6 Problems

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Old Jun 13, 2002 | 10:08 AM
  #1  
92TripleBlack's Avatar
92TripleBlack
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From: Windermere FL
Default ZF-6 Problems

I am having some problems with the 6 speed. Last year it started making a grinding noise whenever I power shifted 1-2 or 2-3. I thought it was the syncros which costs a pretty penny so I avoided the powershifting until I could afford the repair. I recently emailed ZFDOC to ask about getting it fixed. He said that it was probably a bad master and slave for the clutch and not the syncros. I should replace these. Acutually, they were replaced about 2 years/20,000 miles ago. Now the clutch is starting to slip under heavy acceleration. If I punch it while it is in gear it will rev up a little before it grabs(3-400RPM). This sounds to me like a bad clutch and or flywheel.
Can anyone accurately diagnose these problems?

Will replacing the clutch and or flywheel fix the situation?

I just don't want to go haphazardly replacing things until its fixed. I also don't want to pay to have the thing taken out 4 times until its fixed.

Last, can anyone recommend a shop in the NYC area that can properly diagnose me that they trust with the ZF-6?

Thanks for any help
:confused: :sad: :flag


[Modified by 92TripleBlack, 9:08 AM 6/13/2002]
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Old Jun 13, 2002 | 10:49 AM
  #2  
silver & red CE's Avatar
silver & red CE
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From: NW Chicago Suburbs
Default Re: ZF-6 Problems (92TripleBlack)

I'd bleed the clutch's hydralic system befroe anything. Also swap out the trans lube. After that, if it's still granding :(

Eric
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Old Jun 13, 2002 | 01:02 PM
  #3  
92TripleBlack's Avatar
92TripleBlack
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Default Re: ZF-6 Problems (silver & red CE)

I'll try it.
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Old Jun 14, 2002 | 12:14 AM
  #4  
92TripleBlack's Avatar
92TripleBlack
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Default Re: ZF-6 Problems (92TripleBlack)

Any other ideas I should try?
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Old Jun 14, 2002 | 11:37 AM
  #5  
vetluvr's Avatar
vetluvr
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From: Bishopville MD
St. Jude Donor '08
Default Re: ZF-6 Problems (92TripleBlack)

If the engine rev's faster than the car accelerates, it is time for a clutch.
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Old Jun 22, 2002 | 03:11 AM
  #6  
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92TripleBlack
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From: Windermere FL
Default Re: ZF-6 Problems (vetluvr)

New clutch on order and we're trying the fluid changes to see if that helps. Figured I'd throw on a Hurst while I was at it.
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