Its a step-by-step guide to remove the filter gearbox a 1990 BMW E32 735, this manual contains the following information: tools required, the parts required, time to complete, the first job is to drain the oil. This is where you must use the key allen remove sinks plug from the underside of the gearbox sump. When the oil has closed drains, loosely replace drain plug then unscrew the large nut assurance dipstick tube. We can now remove 6 x 10 mm bolts shown above and lower transmission sump. Reassembly is a reversal of the above procedure to ensure the rubber ' so ring is in place by bolting up the filter.
Download Link:
http://www.bmw7resource.Co.uk/TechDocs/4hp22_Gearbox_filter.PDF