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Old 08-03-2016, 02:30 PM   #1
10Seconds
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Who is running a 6L80e with their LS swap?

I want to keep the 6L80, but everyone keeps trying to tell me to just go with a 4L60.

I want to keep the 6L80 because (a) I already own it, (b) its what was originally with the LS3 I got and the computer, etc, (c) 6 speeds seems cool.

So who has done it? Im using the CIC motor mounts if it maters.
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Old 08-03-2016, 04:39 PM   #2
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Thats a big unit that doesn't easily fit in vehicles not specifically designed for a 6 speed slush box. There is also the issue of tap up tap down shifting that is difficult to apply to a steering wheel/column and all of the relevant wiring.

Of course it can be done but it is going to take a lot to make happen. So the real question at hand is do you want a build you can start enjoying a lot sooner? Or do you want your lengthy build to be centered around adding 2 gears?
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Old 08-03-2016, 05:19 PM   #3
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heres my take!
yes the 6L80E will take noticeably more work to install, and its larger and heavier and more expensive to install, making it more difficult , BUT...once its installed you've got a noticeably stronger transmission with a couple more gears, and since Ive shredded a few 700r4 and 4l60 transmission in the past, behind big block engines,Id certainly prefer that 6l80E if it was my car.. it comes down to a question of if you want to compromise and slap something together just to get the car up and running fairly soon, or are you more concerned with having something rather unique and, more durable/ stronger with a couple extra gear ranges,you can be proud of owning , that will take longer and cost more to accomplish?
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
 
Old 08-03-2016, 05:37 PM   #4
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Well, I am looking at using the shrifter6 paddle shift unit, so that would handle that issue. Have to get a new crossmember either way.

Honestly, the extra size of the trans seems mostly to be on the lower half.
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Old 08-03-2016, 11:28 PM   #5
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I'll be watching the outcome. I'm real curious what it would take to get a 6L80e to fit
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Old 08-07-2016, 10:12 PM   #6
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Old 08-16-2016, 09:09 AM   #7
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Quote:
Originally Posted by 10Seconds View Post
I want to keep the 6L80, but everyone keeps trying to tell me to just go with a 4L60.

I want to keep the 6L80 because (a) I already own it, (b) its what was originally with the LS3 I got and the computer, etc, (c) 6 speeds seems cool.

So who has done it? Im using the CIC motor mounts if it maters.
google it there are guys who have done it and i think a company that sells parts for the conversion . If it was me I would sell it and go 4l80e .. But your car your ideas matter !! Mine dont lol
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Old 08-16-2016, 01:33 PM   #8
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I might be totally missing the point here, but if your main objective is to have an OD transmission, why not go w/ a 200R4?

They can be built (or so I've heard) to handle large HP/TQ numbers, and there are adapter kits for the LS engines that make the swap relatively painless.

You wouldn't be able to say your C3 has a 6-speed, but you wouldn't have the headache from trying to get such a big transmission to fit under your car, either.

Possession is 9/10ths of the law, so I understand wanting to use the 6L80e b/c you already have it, but it might be about the same price to go w/ the 200R4 after all the fabrication and additional necessary parts.
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Old 08-17-2016, 07:01 PM   #9
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Just wanted to update this in case someone else is interested, but the 6L80 fits in no problem, no tunnel mods needed at all. I have pics, but not uploaded. I am going to try and find a shallow pan for it as it hangs lower than a 700r4 but all is good.

Edit: Just ordered the G8 pan and filter, looks like I will save about 1.5 inches, so thats great.

Last edited by 10Seconds; 08-17-2016 at 07:52 PM.
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Old 01-14-2017, 03:03 PM   #10
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Quote:
Originally Posted by 10Seconds View Post
Just wanted to update this in case someone else is interested, but the 6L80 fits in no problem, no tunnel mods needed at all. I have pics, but not uploaded. I am going to try and find a shallow pan for it as it hangs lower than a 700r4 but all is good.

Edit: Just ordered the G8 pan and filter, looks like I will save about 1.5 inches, so thats great.
can you pm me some more info and maybe pics ?
I am currently thinking of installing a 4l80E or going 6l80E behind my 383.

Thanks
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Old 09-16-2017, 02:25 AM   #11
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Can i also get pics as im doing the same thing. Would be great to see a build thread with a 6l80e , ill be doing one when i have everything
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Old 09-16-2017, 10:00 AM   #12
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yes posting several clear pictures , and all the details and part numbers that apply to installing that transmission in your corvette, with that engine,here, would be very helpful
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
Old 09-27-2017, 08:37 PM   #13
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I am building a 73 with an LS3 and 6L80. I still have to figure out the shifter, air intake and exhaust. I modified the original crossmember, and used a 3-Bolt Adapter Flange Yoke for the driveshaft.
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Old 09-27-2017, 08:39 PM   #14
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Old 07-24-2018, 11:29 AM   #15
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I know this is an older post but is there an update to this thread? Any photos and/or write up on this install?
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