So yesterday my girlfriends car develop a small leak underneath the transmission. Rather than take it to a mechanic I decided to change the gasket myself and do the transmission filter while I was underneath the car. Long story short what was supposed to be an hour job turned into me working on the car until 3 in the morning. And just as I was supposed to be putting in new transmission fluid I realized that I was actually putting in motor oil. Needless to say the car did not move this morning. Think if I just swap out the fluids I'll be ok? The car is a 95 Chevy Blazer.