One problem related to transmission shudder has been reported for the 2015 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Nissan Altima based on all problems reported for the 2015 Altima.
Cvt transmission vibrates excessively in interior (floorboards, steering wheel, gas pedal, and and me) noise level extremely high inside car. Dealer and Nissan America say they will not fix or buy back car. Purchased new in sept 2014. Had same car 2014 model that had no vibration or noise. Dealer had seven test drives and all agree with me, but no one would commit to saying the car needs to be fixed - they say it could be defective or could be a design problem. Either way I am stuck!!! would not recommend this car to anyone.