1994 Toyota Corolla

Hello, I drove my car on a steep hill with hard acceleration. Since that time at start I hear a vibration noise and when I shift to reverse I still feel vibration. I have also noticed a poor performance. I have to give a lit bit more gas than before climbing the steep hill. I asked people they say that torque is harmed. I also asked the mechanic to check the differentia fluid. He said. If the C.V boots are clean (like in my case) there should no fluid lost in the differential. I transmission fluid is in good shape. Shifts are very smooth and normal. On the speedometer the speed increases slowly even when giving lot of gas. My trnsmission is a 3 speed.