hello i recently ran into issues with transmission.. when put into reverse acts weird.sometimes it will back up normal other times ,you have to give it alot of throttle and when it does move, it like chatters the tires.like its fighting itself?then sometimes it will back up with barely any throttle.ive done the following dropped the valve body,Air checked front rear clutches and low/reverse servo and front servo everything is applying and releasing.adjusted low/reverse band. i can drive the truck up and down the road and all forward gears shift as it always has.any ideas? tranny is built with following cheetah rpmvb w/lba added later by john cope,red clutches, kolene steels,both bands were new and red lined material.4.2 lever.hd spring and extra thick rear servo cover,upgraded reaction support oil mods,i have everything written down with all specs from when i rebuilt it. thanks