The gearbox of the m/42 TM wasn't working well and these tanks were built either as m/42 TH, or they got a new mechanical gearbox and became known m/42 TV.
В 1957 году Strv m/42 были модернизированы путём установки новой башни с длинноствольной 75-мм пушкой, получив обозначение Strv 74.