As of recently, my Turbo 400 AT started whining. It has a large oil cooler and about 4,000 miles on it since I had it rebuilt. It is a RPM whine, not a speed whine. The fluid was a little overfilled, so I drained it but that didn't help (6 ozs). The oil seems very clean. The Vehicle is a 304 cui '73 Commando with 86K original miles. I added Slick 50 AT conditioner last night and it didn't help either. It shifts and runs great. I doesn't seem to whine in reverse, or barely in park but it does in neutral and most apparent when the RPMs are higher in the Drive. Anybody have any suggestions?
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