SOURCE: 2003 Electra Glide Classic.
Drain the oil and refill with 18 ounces of fresh oil mixed with 6 ounces of Lucas gear lube and see if that helps. If a transmission is whining, not a lot you can do except rebuild it. Are you sure it's the transmission and not the final drive belt. If the final drive belt is loose, it will rise up and rub on the bottom of the inner primary when you let off on the gas and make a whining noise.
Steve
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