Transmission leaking alot near front right tire. Still shifts no problem.

You are right. Its the front driver side. The fluid is red. I drove it home 3 miles it was dripping out and made a mess by the driver door and fluid is low. I've added a quart back but not driven it. I had no shifting problems. My mom had the car since 2004 first and never serviced anything on the transmission. Could it need a filter and fluid change or the line cracked? Can't afford to purchase rebuilt one, Christmas is 3 weeks away ☹.