Vehicle specs in signature. Recently when driving in Drive or Over-Drive my car won't accelerate beyond ~25mph. It drives fine until 25, and then if I try to accelerate more the engine runs and spins as if in neutral but the speed of the vehicle remains the same. If I switch to what I think is 2nd(I'll explain the 'think' in a moment) I can get up to around 35-40. I've been able to hit 45 but that didn't feel safe. Also when I was at 45 and coasting downhill I was actually losing speed. The 'think' of 2nd Gear: My gear selector has P, N, R, O-D, D, 2, and 1 listed. I can switch from P through D normally but when I get to 2 I can't switch any further even though the selector shows I should be able to. I know P through R are correct, but I don't fully know if O-D through 1 are. I usually drove it in O-D but on my last trip I drove it in 2 so I could go 35 instead of 25. We've had this car for 10-15 years, don't remember exactly. I know we had some rear end work done on it around 10 years ago. I thought we had some transmission work done as well, but I can't remember exactly. I'd like to hear y'alls thoughts and opinions. I fear I am in need of some major transmission work. I have one specific question first though: If needed, can I drive it in 2 over short distance without further damaging anything? I have a weekly obligation about 5 miles away, town is 10 miles, and the mechanic is about 5 miles away. Thanks in advance.