Might be; transmissions rely on a good engine performance to work properly. Just keep an eye on it to make sure you don't end up damaging your transmission.
If you have a cheap OBD II scanner you might want to give it a try to see if there are any pending codes, some transmission codes can be read this way.
You're right the leak wouldn't cause that based on it's location.
1995 Lincoln Town Car Signature
1997 Pontiac Grand Prix GT
2000 Ford Windstar SE
"If you don't agree with me I respect you; if I don't agree with you I'm an ignorant? Nice thinking smart guy...