700R4 behind a LY6
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From: ocala,fl--- forest-ocklawaha
reason is 700r4 is weak,,, and the 6.0 willl tear it up soon,,, i dont kno about controlling it,,only way is with seperate controller or manual valve body.. i dont no too much about them cause i wouldnt use one,,i feel safer with a 4l80e..just save up and buy a 4l80e.perferably a newer one 07' or newer.. then u could get it working with your setup..
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From: ocala,fl--- forest-ocklawaha
the 6l80e will work with that set up.. ecm and tcm will control it,, but its big,,real big.. !
i have a 4l80e forsale $450 and no one's bought it..!! cant believe it,,thats as low as im going..id rather keep it for spare ,then to sell it for less..
i have a 4l80e forsale $450 and no one's bought it..!! cant believe it,,thats as low as im going..id rather keep it for spare ,then to sell it for less..
Ummm...my tranny guy built my last 700 to withstand 600HP, as with anything, you have to build it to withstand the need........a 700 and a 60E have bascially the same guts, and length dimensionally....
For dimensions click the link....
http://www.tciauto.com/Products/TechInfo/trans_dims.asp
As far as controlling them, click the link.....
http://www.tvmadeez.com/ls1_cam/
All you need is an adapter, and a little muscle......it can be done.....
T,
For dimensions click the link....
http://www.tciauto.com/Products/TechInfo/trans_dims.asp
As far as controlling them, click the link.....
http://www.tvmadeez.com/ls1_cam/
All you need is an adapter, and a little muscle......it can be done.....
T,
[QUOTE=TomM;12785710]Ummm...my tranny guy built my last 700 to withstand 600HP, as with anything, you have to build it to withstand the need........a 700 and a 60E have bascially the same guts, and length dimensionally....
F
A 4l60E and th700r4 are the same transmission. The difference is the 700r4 being the older non computer controlled tranny had a kickdown cable to control line pressure. The E in 4l60e stands for Electronic. The 4L60E is of course electronically controlled via the PCM by way of solenoids in the valve body.
The 4L80E is a modern version of the TH400.
The 700R4 can be very easily built to withstand alot of HP. Replace the sunshell with a $80 "the beast sunshell", Kevlar 2-4 band, Hi-energy clutch and steels, do all the updates to the valve body (8 or so of them) and upgrade the planetary unit and make sure you put a corvette servo in. Not super expensive if the tranny already needs a rebuild anyway, and who wants a well used tranny behind their freshly installed LS anyway?
4L80E is longer than 4L60E/TH700r4 so you will need driveshaft shortened.
Good luck.
F
A 4l60E and th700r4 are the same transmission. The difference is the 700r4 being the older non computer controlled tranny had a kickdown cable to control line pressure. The E in 4l60e stands for Electronic. The 4L60E is of course electronically controlled via the PCM by way of solenoids in the valve body.
The 4L80E is a modern version of the TH400.
The 700R4 can be very easily built to withstand alot of HP. Replace the sunshell with a $80 "the beast sunshell", Kevlar 2-4 band, Hi-energy clutch and steels, do all the updates to the valve body (8 or so of them) and upgrade the planetary unit and make sure you put a corvette servo in. Not super expensive if the tranny already needs a rebuild anyway, and who wants a well used tranny behind their freshly installed LS anyway?
4L80E is longer than 4L60E/TH700r4 so you will need driveshaft shortened.
Good luck.
Last edited by remauto1187; Jan 22, 2010 at 08:36 PM.
reason is 700r4 is weak,,, and the 6.0 willl tear it up soon,,, i dont kno about controlling it,,only way is with seperate controller or manual valve body.. i dont no too much about them cause i wouldnt use one,,i feel safer with a 4l80e..just save up and buy a 4l80e.perferably a newer one 07' or newer.. then u could get it working with your setup..
I guess every one has there own opinions about the "weak" 700R4......
Heres mine
http://www.youtube.com/watch?v=QaLTcvD6Zlc
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On The Tree
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From: West Mich
People have been putting 700r4's behind big horsepower engines since they came out. Like with anything, you gotta know the tricks to making them last.
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Verdad Gallardo Exactly! If the builder doesn't know the 700r4 and all its weak points then you arent going to get one that holds up. Would you take a chevy engine to a rebuild shop that only does import rebuilds but has time to do your sbc since business is slow?
Agreed. ^^^
Hmmm, 10:22. Yep, looks real weak to me... 
I'll stick with my "weak" 4L60E since it is smaller and lighter than an '80. Besides the only way my car is going that fast is being towed by his or one like it. 
There are at least two sponsors on the board that build 700R4 / 4L60E transmissions that will do what 6L.IROC-Z is doing all day long for reasonable prices. One has a topic in the transmission section cataloging the parts he puts into each unit and the testing it receives before shipping if that tells you anything...
I'll stick with my "weak" 4L60E since it is smaller and lighter than an '80. Besides the only way my car is going that fast is being towed by his or one like it. There are at least two sponsors on the board that build 700R4 / 4L60E transmissions that will do what 6L.IROC-Z is doing all day long for reasonable prices. One has a topic in the transmission section cataloging the parts he puts into each unit and the testing it receives before shipping if that tells you anything...
On The Tree
Joined: Jul 2006
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From: Upstate South Carolina
Back to the original question. The 700r4 requires a TV cable off the throttle. You can do it but the LY6 is drive by wire so you have to set up the TV cable to work directly off the throttle pedel. For my vote I have built 700r4's, 4l60e's and 4l80e's. The 700r4's and 4l60e can hold some pretty good power if built right. They are great for builders since we know we will have to go though them again...probably sooner rather than later..The 4l80e is a TH400 with overdrive. Build it once with decent parts and never worry about it again.
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From: ocala,fl--- forest-ocklawaha
exactly my point..in stock form there weak,,you have to build them... my stock 4l80e is holding fine with the mpt70 5.3 14psi... try doing that with stock 4l60e/700r4.. 60e stands for its rated strenght by the way..
weak weak weak in "stock form"
weak weak weak in "stock form"
Why buy a 4l80e used when you can get the 4l60e/700r4 cheaper and money leftover towards rebuilding it right.
To expect a mid 80's factory 700r4 to hold up to a modern LS engine HP is just plain dreamland! Even the 85 TPI equipped Corvette 350 was only rated for 245hp. So the 700r4 of that era didnt have to holdup to alot.
To expect a mid 80's factory 700r4 to hold up to a modern LS engine HP is just plain dreamland! Even the 85 TPI equipped Corvette 350 was only rated for 245hp. So the 700r4 of that era didnt have to holdup to alot.
I guess I missed the whole " stock form " part... Im not trying to say that a 700r4 or a 60e is stronger than a th400 or a 80e. I just think its funny when people dog the 700r4/60e and say they are weak when mine and plenty others have been 10.2x's and faster at 3550 lbs. They both (700r4/60e & th400/80e) have there places. I have had very good luck with the 700r4 and dont have to have a computer to control it.
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From: ocala,fl--- forest-ocklawaha
i like that they have a lower first gear.. quicker out the hole.. i just dont have money to put in a transmission.. i pick up 4l80e's for almost nuttin,,..
bad *** car 6l.iroc
bad *** car 6l.iroc
https://ls1tech.com/forums/conversio...-22-130-a.html
853's milled just enough to get flat, that's it
853's milled just enough to get flat, that's it