help please

[black n yellow]

03 mazda protege mazdaspeed.

there is some type of vibration when i rev the engine from 2.5k to 4k rpms and ot also happens when im driving so im guessing its coming from the engine. does anyone have any idea what this could be? im not very good with cars and i need some advice and help please.

 

[mazdaspeedp]

could be the rear motor mount is torn. does it feel like the engine moves allot everytime you shift?

 

[black n yellow]

that could make sence because thats the only mount that i didnt have replaced but i have the new mount for it. but you dont think its the crankshaft or anything do you?