is this normal for a tranny?

[JLHollowX13]

so my transmission is acting... funny... i think. i searched using the symptoms it has and i read about the torque converter could be the problem, but my symptoms didnt seem to be exactly what i read about. my transmission jumps like i read about other poeples' doing, but mine doesnt jump randomly or anything. ill give an example: when im driving on the highway ill be at 2k while im giving it a little bit of gas. ill let off the gas and itll drop to 1500, then i give it a little bit of gas again and itll go back to 2k. is there something that needs to be fixed or is this normal? is it in fact the torque converter? is it affecting anything? if so what? thanks in advance!