[Formulajones]

Originally Posted by ponjohn

Interesting.

Have you compared a fully automatic pass vs. manually shifted?

I have with 4L60E's and there is no discernable difference. Actually the runs were more consistent and quicker with the computer taking control because it took human error out of it. That's the neat thing about the E trans, I can precisely choose the shift points needed down to double digit rpms, and it would duplicate it every time without the need to even watch the tach once you have it where you want it, and I can then concentrate on cutting a light and pointing the car.

I'm sure the 4L80E wouldn't be any different and that's one of the big attractions of it for me.

Honestly though, once you have the parameters you want programmed, and have the trans shifting exactly the way you want, with both upshifts and downshifts occurring where you want them when you whack the throttle, I rarely find the need to ever move the shifter out of OD. While all that can also be done with a TH400 governor, that process is extremely time consuming, messy, and I usually go through a couple gallons of trans fluid and a few days of my time before I eventually get the trans doing what I want for a particular engine. With an "E" trans you just push a few buttons, and it can be done on the fly as well.