How to change transmission filter in a 1994 Volvo 940 turbo

1) Work safely: work on this only when the transmission is cold. Hot transmission oil will burn you. Note - the transmission filter is actually a metal screen. If you search on AW71 filter and look at the images you can get a better sense of what you are working on if you haven't done one.
2) Drain the oil via the drain plug. The recommendation is that at the same time of changing the filter, the transmission should be pressure-flushed, removing suspended particles in the oil itself.
3) Remove the transmission oil pan. Be prepared for some oil spillage from the valve body.
4) Remove the screen, observing scrupulous cleanliness when working inside this area. Note how it is installed very carefully.
5) Attached to the transmission are magnets, designed to trap metallic shaving before they can damage the transmission. Clean these thoroughly.
6) Clean the transmission oil pan thoroughly and allow it to dry completely.
7) Using a new filter, install it correctly into its location.
8) Using a new transmission oil pan gasket, install the pan and tighten to the specified torque in a criss-cross pattern. Do this slowly and incrementally; it is possible to warp the pan on installation.
9) Top up the oil level if much was lost - observe proper top-up procedures and never overfill the transmission. Check for leaks from the drain plug and oil pan gasket. If you overfill, transmission fluid will be ejected from the fill tube and there is a risk of damaging the unit.
10) Road test the vehicle.
11) Check the oil level once again, ensuring that it is neither underfilled nor overfilled.