Grit dog wrote:
If I floored it at highway speeds and got kickdown to 2nd gear then an automatic upshift to 3rd with the trans manually shifted down to "3", I never felt or saw a lockup reduction in rpms in 3rd gear, but upon shifting to 4th, it would lockup a couple seconds after the shift, dropping another 2-300rpms.
This makes me question if that era of trans 4L60 or 80 does lock the converter in 3rd gear at all.
Hey GD, did you happen to try to find a way to cancel lockup as well? I remember in a late 90's Toyota you could use your left foot to touch the brake pedal just enough to light the brake lights. When you did this you could watch the RPM jump up about 200. I tried it in the Suburban and there was no change. But that was when I was towing and it possibly wasn't even locked up at the time.
