the whinning could be a lack of fluid or lack of fluid circulation. as auto trannys age the time it takes for them to initially engage will start to lengthen. any more than 5 seconds is not a very good sign. I'd drop the pan and change the filter and flush and fill till there's no more black in the fluid. Then try adding a product like trans x or other good additive which will soften the rubber seals and hopefully get you more hydraulic pressure. good luck and start saving your cash.