My 04 sub which is 2 whl and is 3/4 ton has a 4L80E tranny and I am wondering if I can turn the converter on and off. The reason is that in my old sub which was a 96 2 whl 3/4 ton with a 5.7 and the same tranny, I could come off of the converter by a slight touch of the brake pedal. This was so cool when towing or going up a hill on overdrive. I have tried the same trick with the 04 but to no avail. The only thing I can do is depress the throttle down about 1 inch or so to get down a gear then let the throttle up a little.