4L80 Conversion from 4L60.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
4L80 Conversion from 4L60.
I was reading someone here had done one, and to be honest I really dont want to rebuild another 4L60 if I dont have to. But Raptor has a
4L80 adapter set up, kit, complete etc.
Is it all that difficult to put one in if you have and adapter and a non electronic 4L80E. ALso, you can get deeper first gears too, 2.75 vs 2.48.
And, would it be worth it. I think in the long run it would be.
But, if anyone has done one, share the wealth, time and pics if you have them.
http://transmissioncenter.net/competition.htm
http://www.transmissioncenter.net/4L80E.htm
4L80 adapter set up, kit, complete etc.
Is it all that difficult to put one in if you have and adapter and a non electronic 4L80E. ALso, you can get deeper first gears too, 2.75 vs 2.48.
And, would it be worth it. I think in the long run it would be.
But, if anyone has done one, share the wealth, time and pics if you have them.
http://transmissioncenter.net/competition.htm
http://www.transmissioncenter.net/4L80E.htm
Last edited by steve40th; Mar 31, 2007 at 02:29 PM.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Steve, actually I think our first gear is a 3.06. That being said, I had heard the main reason a 350 transmission makes a faster drag car is the ratios are closer together and you dont have as much rpm drop between shifts.
They make a stand alone computer for us without a computer controlled car to control the transmission but I heard it is over $1000.00
My transmission buddy told me it could be set up with a manual valve body to get around the computer.
I look forward to what others say about this subject.
They make a stand alone computer for us without a computer controlled car to control the transmission but I heard it is over $1000.00
My transmission buddy told me it could be set up with a manual valve body to get around the computer.
I look forward to what others say about this subject.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
May your experience save me money!! 
Team Owner
Joined: Sep 2001
Posts: 62,127
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Other wise the tranny feels fine, but...
I have a feeling I will be keeping this baby for the a long time coming, and the Opti (DELTEQ already on), Tranny and Extreme duty timing(EWP and regular timing chain) chain issues will be resolved if I keep her.
This 4L80 just seems right, and wether a Turbo 400 with Gear Vendors is cheaper or whatever, having a bulletproof transmission is a must if I keep her with the 396 in front of it.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
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