My assumption is that as bigchief mention is that when you are at the cruising MPH that you mention, you are below the stall speed. The converter needs to "spool up" before you get the full engagment. IMHO, that stall is too high to run with a 3.08 rear end. If you had steeper gears, then you are at higher RPMs for the same given speed, and that's where the higher stall converter comes into play.
I know that washing and waxing my car with the present condtion of my paint is like polishing a turd.....but it's my turd and I want it polished!
![[Linked Image from imageshack.us]](http://imageshack.us/photo/my-images/845/turd2.png/)
