[SFord]

I have a 94' v-6 Mustang, 5-speed. I looked under the car and where the drive shaft connects to the transmission gear box, oil is seeping out, down the transmission case, and toward the back of the gear box.

First, what is the problem here? Second, how much should this fix cost me to make? Third, how critical is this problem (ie, fix yesterday?)? If you know about this or can offer advice, I would really appreciate it! Thank you very much,