The standard gearbox for the 316 and some 318i models is the Getrag 220 4-speed, these models had the option of the 5-speed Getrag 240.
Some European market facelift M20 cars (320i and 325i) were also available with a ZF manual transmission, however this was not a listed option, or specific to any particular market or factory, and is thus very rare to find.