My car (95' pontiac sunfire) is leaking transmission fluid.?

[Shelli A]

I dont know if its just a gasket-seal problem or if it needs a new tranny? I noticed a week ago when I moved my car there was a small amount of dirty red fluid on ground. I checked my transmission fluid it was low via the leak. Then I also noticed when I start my car the engine sounds really rough and when I put in in drive, it shifts hard and pops. Also I dont know if this is related but when I step on the brakes they slip and lose pressure, make a popping noise and then go back to normal. Is this part of the transmission problem?

 

[ckostura]

may just be the pan gasket or have a hole in the pan itself. both an easy but pain in the a** fix.
Go to parts store and buy a transmission filter kit.
loosen the bolts of pan but not all the way, loosening one side/corner a little more to allow all the fluid to drain. take pan off. unbolt filter. inspect both the pan and filter for any metal shavings or chunks of clutch material. some dark dust material is normal clutch wear. clean gasket mating surfaces, install new filter, pan. refill fluid. check for leaks.

if you have a hole in the pan, a quick weld can close it up.