MY car is rough to shift from park-neutral-drive and when reversed!?

What is your question?

I have had issues with the safety neutral switch in the past and had a mobile mechanic get underneath the car and he lubricated some part - can remember what it was! Today was hot and it was especially rough to shift from park to reverse and then drive. It is easy to shift from drive to 2nd. My car has 119,621 miles and it has been 29,000 miles since my last transmission service and my mechanic told me that I didn't need to have it serviced for 50,000 to 60,000 miles. I need to know if it is safe to drive the car? I just got my oil changed - do that every 3,000 miles. Appreciate experienced feedback?