The two codes, P0736 (https://www.yourmechanic.com/article/p0736-obd-ii-trouble-code-reverse-incorrect-gear-ratio-by-valerie-johnston) and P0730 (https://www.yourmechanic.com/article/p0730-obd-ii-trouble-code-incorrect-gear-ratio-by-ian-swan) overlap to some extent insofar as possible faults. If the transmission fluid got really low, the transmission might have overheated with several consequences: burnt fluid; mechanical damage, case/part distortion, damage to hydraulic...
