excuse me if this has already been asked, but i am at 65,700 miles and recently had my transmission fluid flushed and replaced at a Nissan dealership and ever since then the car sounds totally different. It is almost a faint whinning when you accelerate, especially on a hill. Took it back and was told they didn't hear anything strange. I know my car and it is sound very different and not running nearly as quiet. Any suggestions or comments?
Thank you very much!