I have little to go on except the large NAG(?) has a 3.95 first gear and the small NAG has around a 3.59 first gear. The 1-2 shift occurs at 40mph. I am also trying to find out when/what gears lock-up the converter and at part or full throttle. Inquiring minds want to know! Thanks, Sweet!

 

Not quite sure what you are asking... but here are the gear ratios for the 722.6 5 speed auto:

1st: 3.59:1
2nd: 2.19:1
3rd: 1.41:1
4th: 1.00:1
5th: 0.83:1
Reverse: 3.16:1

Here is a graph of the converter lockup I grabbed off of mbworld awhile ago. Lockup is based on RPM and accelerator pedal position: