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

4 + 3 Overdrive problem

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Old Jun 9, 2002 | 11:32 PM
  #1  
fclarke's Avatar
fclarke
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From: Arvada CO
Default 4 + 3 Overdrive problem

My transmission will not go in to overdrive. The Overdrive light comes on and when "in Overdrive" the car free wheels until engine speed matches road speed (no compression braking) but I do not get a gear change. RPM remains over 3000 at speeds over 60 mph. I have changed fluid twice but no fix. Does anyone know of a vendor who does an exchange ?
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Old Jun 10, 2002 | 12:31 AM
  #2  
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JonM
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Default Re: 4 + 3 Overdrive problem (fclarke)

I have never had dealings with them ...only know of the site

http://www.pipersauto.com/4speeds.html

Here is a couple troubleshooter

http://www.gearzone.net/dne.htm

http://corvetteobsession.homestead.c..._dougnash.html
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Old Jun 10, 2002 | 07:42 PM
  #3  
TrueBlue ChevyDude's Avatar
TrueBlue ChevyDude
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From: Brandywine, Chester and Ridley Valleys Pennsylvania
Default Re: 4 + 3 Overdrive problem (fclarke)

Might try S-K Speed in New Yawk as well. I got an overdrive and a 4 speed from them, good stuff...

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