Volvo M41 gearbox

The Volvo M41 transmission is an improved version of the legendary M40 four-speed manual transmission, equipped with a Laycock de Normanville overdrive unit. This transmission was used in various rear-wheel drive Volvo models from the mid-1960s to the late 1970s, such as the Amazon (122S), the P1800, and the early 140 series. The M41 is often considered one of the best manual transmissions of its time, mainly due to its reliability and smooth shifting.