[Scott Stoneburg]

Any transmission experts here? I'm having issues with my new trans. Just finished reinstalling it.... 2nd time...The new issue is no gear braking when I down shift from 3rd to 2nd. It does when going down to 1st though. I called the builder and he doesn't know why. He said he used 4L80 2nd gear bands so it should be stronger than before. Are the bands interchangeable from a 4L80 to a TH400?
It seems to shift under power like it should but
I couldn't make a full hit anywhere around here my trans has never in the past had the no gear braking option.