Hello,
My 2009Maxima had weird vibrations. They are only on acceleration between 60-80km/40-50mph. I have new engine mounts, new tie rod ends, new oem control arms, wheels are balanced. When I pass ca 85-90km/h it stops vibrating. I noticed that it is connecteded with engine load - when I accelerate riding down to hill it is much less significant, and it more signifant when I climb ip. When I try to accelerate faster (on higher rpm's) I didn't notice vibrations.

Do you have idea what can be wrong?

 

New doesn't always mean good. Symptoms point to engine mounts (rear specifically) , worn cv, or even weak coiil/plug in a cylinder can make a lot of vibration under load.

 

Check your axles for a rip that’s what happend to me and it was just my axles