ok guys i have a awd TBSS and was seeing if any one knows if i can just swap a 4l80e in for the 70 what will be the transfer case probs if any? thanks guys

the tbss awd trannys are going out left and right check out trailblazerss.com
get a 2wd they are faster and not breaking like the awds are.

well since i have a awd i guess i will just have to make it work

I figure I will just drive mine like I want and if I decide I really want to keep the TBSS longer, then I will buy the extended warranty. I was going to SC mine, but instead will just end up buying a Vette or something equivilant to play with anyway. I am going to leave it with a tune, cat back and CAI.

You have a warranty, use it.

ya well i plan on breaking the 700hp mark its hard to bring that to the dealer lol!!! i was just tring to see if i could get some more info but not looking so good

Why would you want to do a 4L80E swap? They are almost as strong as the 4L80E and have WAY less rotating mass that the 80.. Converter,valvebody and a big cooler will make it last nice and long..

No way will the bandaid 4l70 handle near the power of a 4l80. The 4l70 is basicly (sp) a 4l60 with a few upgraded parts. If you have seen the internals of the 60 vs the 80 it is obvious why the 80 can handle so much more power. A shift kit and a few other parts and a 4l80 will handle 900 hp. A fully built 60 will not approch those capabilities.

the tbss awd trannys are going out left and right check out trailblazerss.com
get a 2wd they are faster and not breaking like the awds are.

How many documented failures in AWD have you seen besides the two in your shop? In the thread over there someone posted they own a 2WD and it failed less than 5K miles. In the same thread someone asked you:

Have to ask though, how many higher power AWD vehicles have your 2 customers owned?

and you responded:

most are stock guys drive them pretty hard (lots of stuff i dont even do to mine donuts street racing etc)
both all wheel drive trucks tranny took a shat under 5k miles and they are STOCK.

Sounds like they're beating the hell out of the trucks according to your response.

http://www.trailblazerss.com/forums/index.php?showtopic=1869&st=0

No way will the bandaid 4l70 handle near the power of a 4l80. The 4l70 is basicly (sp) a 4l60 with a few upgraded parts. If you have seen the internals of the 60 vs the 80 it is obvious why the 80 can handle so much more power. A shift kit and a few other parts and a 4l80 will handle 900 hp. A fully built 60 will not approch those capabilities.
It's worse than that - the 4L70E is still a 700R4 at its heart. No amount of hardened parts, kevlar bands, etc. will ever change that.

the other cool thing about the 80 is i can keep the stock transfer case or fab in the hd case so it will be a 4wd

I think it ended up costing almost 10K to do this swap in a SilveradoSS, that is a tad $$$