This makes for a more difficult 1st to 2nd up-shift. The shift pattern is considered to be odd with reverse at the top left and first on the bottom left. However the two shafts and gear sets themselves are attached to an intermediate plate that is sandwiched between the larger casting and the end plate (sometimes referred to as the “nose cone” or “tail cone”.) The transmission was designed as a 5-speed however 4-speed versions were offered. The basic design consists of a main segment that houses the gears, differential and bell-housing. The initial version utilized a cast aluminum housing with later models having a cast magnesium housing. However for simplicity purposes this article will use the term transmission.Īs part of the creation of the type 911 (901) car, Porsche created an all new transmission which became the 901 transmission. Transaxle is the correct definition instead of transmission due to the differential being part of the overall design. The transmission was used primarily in the 911 but variations were also used in the 904, 906, 912 and 914 production road and race cars. ![]() ![]() ![]() The 901 series Porsche transmissions was a four or five speed longitudinal transaxle designed and manufactured by Porsche between 19.
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