Man you should hear how loud the whining is in tomos transmissions, it’s kinda cool though you can hear everything working.
If you’re rebuilding an engine make sure to change all the bearings and seals at once, on e50s you really need to worry about shimming the clutch bell. Maybe just check out your clutch bell relief on the crank? Make sure there is very little to no play in the crank after removing the whole clutch assembly.
After checking these things, my 2 cents is to keep running it, some transmissions are louder than others imho
good luck to ya