One problem related to transmission shudder has been reported for the 2007 Nissan Xterra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Nissan Xterra based on all problems reported for the 2007 Xterra.
Car has a little over 100,000 miles and began to vibrate in transmission then noticed radiator was full of slimy sludge mechanic suggested we replace radiator and thermostats which we did ($478. 52). Ran for about a week after and just shut off one day throwing up engine codes for transmission. That's when we discovered the coolant contamination. Upon calling Nissan they informed me it was not going to be cheap would need to replace transmission. Car has been sitting since and I still owe on it but cant afford the 3-6k dollar estimates I have received.