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

Tranny Question

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Old Feb 15, 2006 | 03:35 PM
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Hello my question is...is there any way to disable the converter lockup in overdrive? seems to do it in drive also around 40mph...is it a fluid lockup...thats what ive been told. the car fells like it missing when its in overdrive, but i know its not the engine thats causing the chugging felling. that for any info. Mike
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Old Feb 15, 2006 | 03:46 PM
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93? chugging in OD? I would suspect 2 things, one cheap and easy, the other tragic.

Cheap and easy: the TV cable needs to be adjusted.

Tragic: the transmission is toast.
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Old Feb 15, 2006 | 04:20 PM
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Or the EGR is bad but you should get a code for that.Have you checked for codes?The TC lock up prevents overheating of the tranny so unless you are changing trannys it is not something you want to disable.Mine locks up ~45mph and that can be changed by burning the ecm chip.Reguardless your car should not "chug" look for the real problem and fix it.
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Old Feb 15, 2006 | 05:57 PM
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For a short ride, you can reach under the car and disconnect the tcc connector from the trans and go for a ride.
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Old Feb 15, 2006 | 06:50 PM
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what's the tv cable? and how do i adjust it?...it does'nt chug in 1st 2nd or drive only when it goes into overdrive...thanks for all the info....PS the tranny was built to handle over 700hps it also has a 3000rpm stall converter in it. and a hurst shift kit..

Last edited by 93stroked; Feb 15, 2006 at 06:55 PM.
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Old Feb 15, 2006 | 10:02 PM
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http://www.tvmadeez.com/
This link will explain but your adjustment is different than what they say because you have the ASR.You will need the factory service manual for your year from www.helminc.com.

I believe your lock up is by the ecm though.
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Old Feb 15, 2006 | 11:08 PM
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The high gear clutch pack is probably going out of it. I have seen this many times in overheated 4L60's.
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Old Feb 16, 2006 | 01:39 AM
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High gear clutch pack...sounds expensive, I guess if that's what it is I should just have the whole thing rebuilt...........thanks for the info
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Old Feb 16, 2006 | 12:07 PM
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Originally Posted by 93stroked
High gear clutch pack...sounds expensive, I guess if that's what it is I should just have the whole thing rebuilt...........thanks for the info
That's what "high gear clutch pack" translates into - "the whole thing rebuilt."

sorry.
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Old Feb 16, 2006 | 11:42 PM
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has anyone heard anything about this place?
http://www.700r4l60e.com/

Im thinking about just replacing the whole thing.
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Old Feb 17, 2006 | 08:06 AM
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Pro-built has an outstanding reputation for quality transmissions. He is not cheap, but quality costs money. If he does not require a core, sell me your old trans
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Old Feb 17, 2006 | 08:12 AM
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Originally Posted by 93stroked
has anyone heard anything about this place?
http://www.700r4l60e.com/

Im thinking about just replacing the whole thing.
That is Pro-built and it is a well known and respected shop. When I looked at upgrading my tranny, I looked at Pro built or Rossler - I went with Rossler because I could drive to their shop vs shipping.


Do a search in C4 for Pro-built, you will be amazed with the info available.

Good Luck.
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