ive got a 95 z28 when i put it into reverse there is a vibration and sometimes it takes a few seconds to go into rev. also when i get on it in drive it feels like its wheel hopping or maybe a vibration! I put a heavy duty trans mount in it when the original broke. does any1 know what is wrong? rear end or trans maybe ? thanks

 

did you check to see if your torque arm is loose?