December 2007 issue of Car Craft.
Interesting it gives gear ratios and weights.

http://i26.photobucket.com/albums/c117/ttamrettus/GM6speedautomatics002.jpg

I find it very odd that any magazine would publish this information now, as if it was news.

The designations, ratios and weights have been public information for at least 2 years. The below is from a document released in Sept. 2005, and includes the ratios, net weights, and a host of other information. . .

- Ray
Currently driving a 2007 Corvette with the 6L80 . . .

"Service Information
Document ID# 1701750
2006 Cadillac STS
Info - New Product Announcement - Hydra-Matic 6L80
Automatic Transmission #05-07-30-023 - (Sep 2, 2005)
New Product Announcement -- Hydra-Matic 6L80 Automatic Transmission
2006 Cadillac STS-V, XLR-V
2006 Chevrolet Corvette
with 6L80 Automatic Transmission (RPO MYC)
Purpose
This bulletin introduces and highlights features of the new Hydra-Matic 6L80 Automatic Transmission."

Yeah,

I've seen the ratios before but I thought the weights and the gear change ratio (percentages) were interesting. I have been looking at changing the transmission in my 68 Chevelle and have been looking at all the various automatic transmissions, their ratios and the spread (rpm drop). For reference. April 2005 Car Craft. (I get all the magazines, I'm running out of room to keep them though)

http://i26.photobucket.com/albums/c117/ttamrettus/GMautomatics001.jpg

see also

http://en.wikipedia.org/wiki/List_of_GM_transmissions

Yeah,

....
April 2005 Car Craft. (I get all the magazines, I'm running out of room to keep them though)




HAH!
I have ( most, but not all ) R&T going back to 1962 - NOT a mis-type - 1962.

Very interesting occasionally to compare with contemporary cars & issues....
- Ray
Enjoy the '68!

Why would anyone want a bad ass car with a auto I am a third pedal rowing shifter kind of a guy...

RatedGXPG8, What is your deal with old threads? Are you just trying to up your post count?