[sibrian]

Hi, I'm a new owner of 90 Celica GT-S, engine 5sfe, automatic transmission, and my problem is that when I'm driving, I feel the engine vibrations in my car (that aren't the normal vibrations), the engine sounds great, but I feel the car vibrating too much, my brother told me that I have to check the engine supports, but I don't know, what the f... do you recomend me to do?
The other problem is my transmission, normally, driving at 65mph takes my engine aprox. 2400 RPM, sometimes I'm driving at that engine speed, but the problem is that I don't understand why my engine speed goes up to 2800 RPM to go to the same speed, in other words, I loose power. What can I do to fix it??? Sorry about the explanation, but I'm still learning english. Thanks for all.