Why not change the fluid and filter while you are there?
If not then if you are only loosening the three bolts turn I doubt you will lose any fluid. Usually you have to pry the cover loose to get fluid out.
Edit: I looked at the ears you mentioned, sorry I didn't read closer. You will lose fluid out those holes
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Terry
O,100,72,102,123,104,124,105
125,129,149,1200,982
(2)2182s w/60in Habans
3225
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