A4xn transmission noise in park

I have been doing general mainenace on our old family car (96 Taurus). This car has had previous transmission work done on it although I do not know what, as it was not in my possession at that time. The car is currently up on jack stands with all 4 wheels off. One of the rear brake calipers is removed so it is undriveable for testing right now. I brought the car in due to known various vacuum and coolant leaks. While removing one of the coolant hoses I disconnected the transaxle wiring harness connector (located on top of the transaxle next to the transmission range sensor) to gain a little more room. When I did this the whole assembly came out rather than the connector disengaing. The wires got a yank but nothing extreme. I popped the whole assembly back in and left it alone. After running the engine for testing after the repairs, I noticed a noise that I thought was a vacuum hiss from a leak I missed. After further inspection I was able to determine that the noise was in fact coming from the transmission. I have only been running the car in park and noticed that this noise only happens for about a second or so during quick 1000 rpm increases or higher. It sounds much like a zipping noise similar to a zipper on a coat. I do not know if this was a noise that existed and I overlooked before I started repairs. It is semi likely that it was. What could this noise be and could it have been caused by the yank on the wiring? If a new transaxle may be needed this car may be headed to the scrap yard right as I'm finishing putting about $300 in parts into it :(
Any help would be appreciated!