dont know realy where to start,i have a b&m built 700r4 if u leave it in drive ,even if u push it a little it shifts great,but if u hold it in 1st up to about 6 grand shift to 2nd it still shifts great,hold it in 2nd to abot the same rpm and reach for third it will not shift,u will have to let out of it for almost 2 to 3 seconds be fore it will finially shift to 3 rd,have adjusted the tv cable and i can make it shift easyer or just plain snap ur neck when it shifts,but alway the same result when u hold it and the rpms up it just wont shift till u let all the way out of it.i have checked and made shur that the shifter cable is adjusted correctly,new fluid and filter any ideas?oh by the way its in my 85 mcss,355 ,,,for now soon to be a new 496.