Just so we are clear.... what makes you want to use a 6speed? They don't have anyway really of beefing them up at this point. The 6L80e requires a sperate TCM. They can't hold big big power as evidenced by just about anyone with more than 700hp. (Chevrolade and silver sleeper both proved that) It is a good transmission that isn't worth the extra cost and effort. I would rather do a TH400 and GV every time. Giving you basically a solid mechanical controlled setup that is DD/highway friendly.
ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06
waiting to go in... 3.90s, 214/220cam
The TCM is in the transmission already. Get yourself a compatible PCM so they can communicate with each other.
6l80 is a badass trans and if i was ever building a fun toy again it would have a 6l80 in it some how. My daily is on 35s and makes 540/554 to wheels for last 3000 miles and ive towed in this form. trans hasnt missed a beat yetOriginally Posted by kerrige
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
412 Motorsports
it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
exactly I am a gm tech at a gm dealership at first we had some small issues but now we almost never work on these transmissions
we see all kinds of mods in the 4x4 trucks and in the Camaros with no trans issues
and with the right tune this thing is a real beast
besides I will only be running about 550 rwhp should be fun to drive
With 550whp ^^ should be no problem , they can take a beating but it's all in the tune...custom harness will be needed as mentioned. Good luck
I think I cam make it all work
I do all the engine work all of the rearends and most of the electrical repairs
with that being said its all factory oem work
never any am mods like this will take so I will need the luck
thanks!!!
With the RIGHT tuner the 6L80E can take the power I swear I ran a stock 6L80E for 2.5yrs in my Denali pushing 600-800rwhp and no problems what so ever. Some burn it making 450ish. Pick your tuner wisely. Billy Ray Motorsports actually has a few 1500rwhp rated 6L80Es he's running it in the fastest 5th gen in the Texas Mile.
I know the 4l80e will handle the hp
I'm just not a fan of how the trans feels and shifts!
the 6 speed is in my opinion a much more enjoyable / driveable feeling trans
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