6 speed?

[CHEVROLADE]

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

[thusley]

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!!!

[62nalide]

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.

[thusley]

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

[CHEVROLADE]

6spd will rip out of the hole a lot faster than a 80!

[thusley]

yes sir !!!!!!
found out tonight our master tub has a hole in it!
gotta redo the bathroom before we build a truck!!!!!!
well crap