hey whatsup guys,

so i just recently got my 96 mustang and what ive thought always to have been just a mustang transmission is now making me think something is wrong with it. whenever im getting out of first i have to rev it to like 2000rpm so it wont vibrate my whole car. it feels kinda like when you let go of the clutch without pressing the gas. and i keep getting that vibration all the way up until like third. 4th and 5th have no vibration. any ideas? the guy which i had bought the car from said he just recently changed the clutch, no more than 5k on it. the car is pretty well kept so i dont think he abused the tranny or anything,