in 1st solenoid a & b are on in 2nd sol b is on 3rd both r off in 4th sol a is on in 2nd & 4th the band is on if u have no 2 & 4 then the band is bad if the shell is broken or stripped then u have 1st & 3rd no 2nd /4th / or reverse gears if the 3&4 clutches ar... Login to read more.