Beat me to it. That was the same question I was going to ask.

 

Id bet because no one has really pushed a 6L90e and there arent any stout aftermarket parts for it.

 

Someone has to be the first, right?

 

Absolutely true, I'm just too poor to be the test subject

Only one I know of is chevrolade but he hasn't pushed his any hard than a well built 60e could go.

 

Im pretty sure Zach blew the 6l90 up a while ago

 

see i think next year ill will push the limit on my 6l80 not yet lol but i seen with my own 2 eyes 2009 sierra put down 778rwhp and is still going on a STOCK 6L80E i just dont see how Zach blew his 6l90E

 

Well I gotta say I put close to 600 through my stock 6l80 and haven't had a problem even with all the 4 hi runs I have done. Not to mention all the regular street abuse I gave it before I started my build. And mine is still in perfect working order not one problem. I just don't think it will take the same abuse with 1000+ pushing it. I'm really looking at just a proven bullet proof setup, I'll try the 6l80 setup later once the aftermarket has caught up. Oh and by the way the 6l80 and 90 once built up handle about the same the 90 just a bit more as it has room for an extra clutch pad ring in its packs. But other then that not much diff. Only reason to choose a 90 over a 80 is stock for stock the 90 is stronger.

 

Well I still think we should do the swap so I can get a 6 speed in my truck for a lot cheaper than I was expecting to spend

 

i am doing the opposite in my 08, 4l60e to a 6l90 i will have the computer plus harness for sale in bout a week if ur interested also my truck is very low mileage so nothing is not all crusty

 

I'll let you know if i change my mind but as of right now I would really like to just storage all my stock stuff that way later on I can always use it again...