You don't say if its manual or Auto? I'll pretend its auto and ask if the oil is coming from the join between the trans housing and the engine. If it is then the torque converter shaft seal is failing. This is a job for a knowledgeable person and a trans removal. If its at a drive shaft point, again its a job for a mech. If you give us a bit more in detail maybe we can help. Its an old car and if its done 100k plus miles then its about time for seal failures.
Answers & Comments
You don't say if its manual or Auto? I'll pretend its auto and ask if the oil is coming from the join between the trans housing and the engine. If it is then the torque converter shaft seal is failing. This is a job for a knowledgeable person and a trans removal. If its at a drive shaft point, again its a job for a mech. If you give us a bit more in detail maybe we can help. Its an old car and if its done 100k plus miles then its about time for seal failures.