Product review (4 stars): Perfect fit for LG TROMM WM2277HW washer.
This pump was a perfect fit.  I searched youtube for a video on how to disassemble the machine to replace the pump.  There are two pumps in this machine, one for draining and one for filling the machine, I believe both pumps are the same.  NOTE: One video I found on youtube required you to have a special tool to remove the spring loaded clasp around drum gasket, another video I found, the guy used a butter knife(I used the butter knife).