My Nissan Altima loses power after driving one hour
I have 2009 Nissan Altima 2.5 S. when I drive this car on highway over an hour, my car
loses power and it doesn't want to run over 60 MPH. however, after taking 20 to 30 minute
break car I can drive car for another 20 minutes without losing the power. What do you
think is the problem with me car?
You may need a transmission cooler. My girlfriend's 2.5 Altima has the same problem but only when going steeply uphill on a hot day. We've driven to California from Arizona in January and September. In September I couldn't get the car past 55- 60 on some hills and I heard the same whirring you mention. In January we had no problems taking the exact same way there. She drove her to northern Arizona in July and the car wouldn't go past 20 mph on some hills. When the car is driven in Phoenix it doesn't have ANY problems. She took the car to Nissan and they're installing the transmission cooler for free because it's still under warranty but the part is on back order with LOTS of people needing the same part. Hope this helps
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