6l80

[14 gmcl83]

So will my 6l80 stock hold up to 350rwhp 350rwtq? Trucks got 82k now I got the truck with 68k fluid has been changed the t-stat is gone so lower trans temps. I know my old 11 camaro ss hold up good for awhile then second gear started slipping but that car was making 475/440 then it broke got built then I traded car for the 14 gmc 5.3 crew cab 4x4 slt. I just wanna get headers tune new mufflers swap intake and tb for l86 and be done with it maybe a cutout  would be cool ? Any thoughts ?

[Black02Silverado]

I would think it would hold up just fine.  I wouldn't worry until you get over 500hp I would think.

[jackgraves]

I'm putting down 411-415RWHP it's been 10,000 miles since my mods for this power. All is Good 2015 5.3 Silverado 6L80, Head work, custom tune, long tube headers, stage 3 TSP L83 cam, 3200 stall and 4.10 rear gear

[1SLOW1500]

I can say it will hold double that power. There are a few guys running high 500rwhp. I run over 600 and there is a guy or two running more 850rhp but that is a rcsb.
Just like the motors needs to be tuned right.

Sent from my SM-N950U using Tapatalk

[300 Blackout]

6L80 was the automatic transmission for the Corvette from ‘06-‘14. At that time, the stock Vette had 430+ hp in the base models.

[Gagliano7]

http://www.novak-adapt.com/knowledge/transmissions/automatic/6l80

[Nitrousbird]

To give a comparison for something more similar to your application, my Escalade EXT (2007) had 162k on it and the tranny held up fine...sold the truck with no tranny issues.  That's a truck making 403HP/417ft/lb torque at the flywheel.  6L80 tranny held that fine in a 6000lb AWD truck and the fluid looked like hell when I finally changed it.  

 

So you are talking about similar power in a newer, lower mileage tranny with less weight to deal with.  It was designed to handle what you want to put through it.