Electronic controlled Automatic Transmission 6L80e

1964SuperStocker

Well Known Member
Supporting Member 2
#1
Just had a buddy buy a 6L80e transmission to run in his classic car. He is going to run a paddle style shifter on it. Anyone running one of these in their classic car? Any thoughts?
 

IMBVSUR?

Well Known Member
Supporting Member 2
#4
Nice trans, stronger than a 700r4, and it will be nice once he gets a stand alone controller and gets it set up with the paddle shifters. However I prefer the simplicity of and non computer controlled shift, and of running my lockup with a pressure switch off 4th gear in the valve body and a simple 12 volt source from the break light switch. But I am living in the past, so what do I know. Sounds cool.
 

1964SuperStocker

Well Known Member
Supporting Member 2
#7
Nice trans, stronger than a 700r4, and it will be nice once he gets a stand alone controller and gets it set up with the paddle shifters. However I prefer the simplicity of and non computer controlled shift, and of running my lockup with a pressure switch off 4th gear in the valve body and a simple 12 volt source from the break light switch. But I am living in the past, so what do I know. Sounds cool.
I've been looking around on here and it seems like we are all living in the past. Lol! I'd figure out a way to make it shift from the floor.
 

hot_rod_hooligans

Well Known Member
#9
Will a 6L80 bolt up to a 348/409? Currently running a 700R4 behind a 474(originally had a 348 when the trans was swapped) and am questioning the durability of the trans as I add power.
 

Don Jacks

Well Seasoned Member
Supporting Member 3
#10
That trans will not bolt up without mods to flexplate,crank hub,ect. and will require electronic mods.Not worth it,imo.The 700r4can be built to handle the 474[Fatrides 60 has been running one for years without issues].If you need more,then the 4l80 would be a good choice,besides,what do you need TWO overdrive ratios for anyway?
 
#14
Long term goal is to swap in a Roadster Shop chassis, so I guess fitment issues aren't a huge deal. I didn't think the 6L80 would work, but I had to ask since this guy brought it up. I hadn't thought about the TH350/TH400 with an overdrive, might still look into that. I did wonder about the 4L80 since it came behind the MK IV 454, but haven't seen anyone who had done it, everyone I had seen went the 700R4 route.
I am toying with the idea of FiTech or Holley dual quad EFI, and I know some of Holleys stuff has provisions for GM transmission controllers(which I feel would be a huge improvement over the detent cable it currently has), so if the 4L80 will bolt up, it may be the choice to go with.
 
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