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There is a given with grinding gear selection, the driven plate is exactly that, it's being driven, it's rotating with the fly when it should be ' released' and not free, so you can't get gears, two common reasons are the input shaft ' gland nut' or equivalent bearing are missing or failed leaving the shaft waggling in the breeze, or the driven plate is to thick, measure thickness against a known working plate, this one is very common.
Also Sometimes the input shaft is too long causing the same effect, it produces noise as described and grinding gears, it may be bottoming on the crank when the motor bolts are synched down, easy fix with a grinder.
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