Transmission
Transmission options included a manual 4-speed M400 gearbox, which was known as the M410 when equipped with the optional electrically operated Laycock de Normanville overdrive. Both the M400 and M410 had Volvo's "remote control" shifter, which used a conventionally short, vertical shift stick placed between the front seats; manual-shift models other than the 164 and the P1800 continued until 1971 to use Volvo's direct-control shifter with an extremely long, almost horizontal shift lever with its pivot point well under the dashboard. A 3-speed automatic transmission, the BW35 made by Borg-Warner, was also offered. The automatic shift selector was mounted on the steering column from 1969 through 1971, and on the floor from 1972 through 1975. Despite its rough operation and inefficiency, the BW35 was popular in the North American and Australian markets.
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