If selector is in 'green dot' and the linkage is adjusted correctly and if the transmission starts off in second gear but you can force it to first gear...could be governor. If cooler and cooler lines were not cleaned or dirt got in the cooling lines, on startup the oil from the cooler goes through the governor...dirt sticks in the governor...transmission sticks in second gear.
Not shifting 2-3? Check vacuum modulator, vacuum modulator pin, vacuum source, vacuum line.
Not shifting 2-3? Check kick down linkage...adjustment, bent, or stuck.