View Poll Results: Which trans to use...
Voters: 25. You may not vote on this poll
Need input, build 4l60-e or swap to 4l80-e
Need input, build 4l60-e or swap to 4l80-e Ok heres the deal, just install my twin turbo kit and working out some bugs as we speak. Its heading to the dyno as soon as the bugs are worked out and i know soon after my stock 4l60-e isnt going to last long. It was a trans cooler and temp guago so i can monitor, but i still don't think it will last very long at ~500 rwhp. I need a stall and am going to go with the Yank PY 3400 or 3600 model, but i don't know to get it now for my 4l60-e or wait and swap to 4l80-e when it goes and then get the stall. Basically i'm a little worried about dumping a lot into a 4l60-e rebuild and having it fail. I could get the swap parts and a "stock" 4l80-e for now with the PYE verter. The 4l80-e stock should hold the 500 rwhp ad if it does ever go, i can always build it. However staying 4l60-e would probably be a bit cheaper and much easier. So what do you think... Shoot for a nice build on my 4l60-e with the PYE or give it up and start gather 4l80-e conversion parts and throw in the stock 4l80-e? Im ruling t56 swap out, love the auto, and ruling the th400 out because i want overdrive for my street car, so only 4l60-e or 4l80-e. Thanks!
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I think that a properly built 60 would work but will probably need to be freshened up from time to time with heavy use and racing. If you want a strong trans do the 80 and be done. We have built some very high hp 60's as shown here. http://finishlinetrans.com/projectcars.htm. Good luck with your project and I enjoyed the fquick link. Vince
Thanks Vince, the "freshening up" would get old after a while and would take a toll on the pocketbook i assume. Do you guys offer any types of warranty's with your 60-e's that if they do start slipping or go out you rebuild them or is it just a one time shot, it blows and i need a totally new build? If so i might be heading straight to the 80-e, but if theres some kind of deal with 60-e's ill be looking there. Thanks!
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Originally Posted by Superman09
Thanks Vince, the "freshening up" would get old after a while and would take a toll on the pocketbook i assume. Do you guys offer any types of warranty's with your 60-e's that if they do start slipping or go out you rebuild them or is it just a one time shot, it blows and i need a totally new build? If so i might be heading straight to the 80-e, but if theres some kind of deal with 60-e's ill be looking there. Thanks!
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Where can i get all the swap parts for my 99' Trans Am? I know i need a few things, glad i have a 99' PCM so i'll just get that tuned. What exactly is the full list of parts i need? Complete trans, converter, and the conversion parts (which would be?) and where is a good place to pick them up? Will i need a different than stock length driveshaft as well? And will i HAVE to trailer it to get tuned or is there anyway it will move without tuned? Thanks! I decided i'd rather not mess around with freshen up's, etc, could start slipping at the wrong time.
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Originally Posted by Superman09
Where can i get all the swap parts for my 99' Trans Am? I know i need a few things, glad i have a 99' PCM so i'll just get that tuned. What exactly is the full list of parts i need? Complete trans, converter, and the conversion parts (which would be?) and where is a good place to pick them up? Will i need a different than stock length driveshaft as well? And will i HAVE to trailer it to get tuned or is there anyway it will move without tuned? Thanks! I decided i'd rather not mess around with freshen up's, etc, could start slipping at the wrong time.
ok thanks Vince. I would love to go with a unit from you but i don't even have a core so that price would be way out of my league. I'm going to start with a stock 4l80-e which should hold my power for now not being too radical. Thanks for the help on the parts needed!
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totally different trans. The 60-e is what comes in our cars, the 80-e comes in some bigger 2500 trucks. So they are made to handle the big torque those trucks make and also move their lard asses 
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Just made this, maybe it will help some.
https://ls1tech.com/forums/automatic-transmission/699277-whats-needed-4l60e-4l80e-swap.html
https://ls1tech.com/forums/automatic-transmission/699277-whats-needed-4l60e-4l80e-swap.html
Wait a sec...is this the same "SuperMan" that pulled off the twin saga? If so, the 60 gets a bad rap around here. Considering the level of involvment that you were obviously willing to go thru with the twins you are left with supporting them. Wether you go with the 60 or 80, both properly built will put up with a fair amount of usage but, they are all made by the hands of men and not God-read they will all eventually fail....what are you going to do about that?
Given your'e a young industrious guy who has more will than dough at this point I would advise you to take the high road and edumacate/get supporting tooling and take matters into your own hands and build and care for your own tranny. The 80 is a bolder design period. There are trade offs finacially and weight wise to pull the 80 off.
This is not to knock any of the fine sponsors here. Some even have tranny dyno's and their quality is top notch. They have to eat too though and I just thought of posting this from reading some of your prior threads.
Given your'e a young industrious guy who has more will than dough at this point I would advise you to take the high road and edumacate/get supporting tooling and take matters into your own hands and build and care for your own tranny. The 80 is a bolder design period. There are trade offs finacially and weight wise to pull the 80 off.
This is not to knock any of the fine sponsors here. Some even have tranny dyno's and their quality is top notch. They have to eat too though and I just thought of posting this from reading some of your prior threads.
haha thanks man, same guy here.At this point after looking up some info, i can do the 4l80-e swap with a bone stock 4l80-e with the yank verter for about the same price i can build my 4l60-e up with the same verter. So seeing this, i think the 80-e is the better choice. Sure its a stock unit vs a built to the hills 4l60-e, but stock those 80-e's are in some mammoth trucks with loads of torque, should hold up fine in my little car with the low boost i'm running for now. If it does happen to not hold, then i already have the core for a re-build, and the core is a big price is building 80-e's
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the only reason i cant go with the 80e right now is because of the tuning... now i'm stuck with trying to find a 60e that can last.... but yea, i'd say go with the 80e just for safety sake, unless your in the same boat as me
yea, 99' here so i should be set for tuning. Sucks that the earlier cars cant tune for the 80-e. My buddy just had his 60-e go out and wanted to do the 80-e swap but he's a 98 and it would cost a lot more for the stand alone controller on top of everything needed. I'm going to start gathering parts for the swap.
Z'mnypit- great thread, thats exactly what we need in here!
Z'mnypit- great thread, thats exactly what we need in here!
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