4l80e??????????
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From: roanoke virginia
4l80e?????????? Can you run an 80E without a computer? How would you run one with a carb? My friend is thinking about one for the OD but he was wondering these 2 things.
Thanks.
Thanks.
TransGo makes a kit to convert it to full manual operation with no computer control.
It uses a vacuum modulator so the only connection it needs is a vacuum line. And it will not shift automatically, it stays in whatever gear the shifter is moved to.
It uses a vacuum modulator so the only connection it needs is a vacuum line. And it will not shift automatically, it stays in whatever gear the shifter is moved to.
Staging Lane
Joined: Sep 2004
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Originally Posted by 69firebird
this is true, however the T-com is about 700 dollars. didnt seem like he was looking to do that
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I think that a manual shift in a street car would be a pain in the ***! If he ever saw the TCI he would like it. You have allot of options on shift points and line pressures.
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Joined: Dec 2004
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From: Baltimore, MD.
There is also the GM solution. Use the computer for a diesel truck (the 6.2l / 6.5l, not the 6.6 Dura). It doesn't try to control the engine, just the trans. May have to have some inputs (like TPS) that you would need to rig up.
Just throwing it out there.
'Dreamin'
Just throwing it out there.
'Dreamin'
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Originally Posted by JustDreamin
There is also the GM solution. Use the computer for a diesel truck (the 6.2l / 6.5l, not the 6.6 Dura). It doesn't try to control the engine, just the trans. May have to have some inputs (like TPS) that you would need to rig up.
Just throwing it out there.
'Dreamin'
Just throwing it out there.
'Dreamin'
Also, shift points for a diesel are way different than what we would need for performance. The only possible way to change them would be burning new chips and trying stuff.
I agree with the above, that the TCI T-Com is the only way to go with a 4L80E. I have that setup, and you can change almost all the parameters in the tranny, based on what you're going to do. I have a regular software setup I run, and can download a software setup optimized for racing with nitrous (lower shift points in 1st and 2nd, raised shift point for 3rd so it goes through the lights in 3rd). You can also raise or lower the line pressure curve for each gear, so I can have a softer shift from 1st to 2nd (so I don't break the tires loose) then hammer the rest of the shifts. You can change SW profiles in about 30 seconds.
The downside is that my total bill for a built 4L80E (I got mine from Hughes Performance), TCI computer, software and harness, new crossmember, modified shift linkage, etc. was around $6K. I could have lowered that a little if I had found a suitable 80E core, but I would have only saved maybe $500.
Pix and some detail on my site here: http://home.mindspring.com/~jim_fisk/id1.html
Jim
I agree with the above, that the TCI T-Com is the only way to go with a 4L80E. I have that setup, and you can change almost all the parameters in the tranny, based on what you're going to do. I have a regular software setup I run, and can download a software setup optimized for racing with nitrous (lower shift points in 1st and 2nd, raised shift point for 3rd so it goes through the lights in 3rd). You can also raise or lower the line pressure curve for each gear, so I can have a softer shift from 1st to 2nd (so I don't break the tires loose) then hammer the rest of the shifts. You can change SW profiles in about 30 seconds.
The downside is that my total bill for a built 4L80E (I got mine from Hughes Performance), TCI computer, software and harness, new crossmember, modified shift linkage, etc. was around $6K. I could have lowered that a little if I had found a suitable 80E core, but I would have only saved maybe $500.
Pix and some detail on my site here: http://home.mindspring.com/~jim_fisk/id1.html
Jim
Why not just use ECM from a 6.0L (LS1) chevy 2500 series truck with a stock 4L80E? I know some if not all 2500 series vans come with 4L80E's.
Originally Posted by JustDreamin
There is also the GM solution. Use the computer for a diesel truck (the 6.2l / 6.5l, not the 6.6 Dura). It doesn't try to control the engine, just the trans. May have to have some inputs (like TPS) that you would need to rig up.
Just throwing it out there.
'Dreamin'
Just throwing it out there.
'Dreamin'
