The transmission no longer shifts from 3rd gear into 4th (or overdrive). I didn't notice this until one day I was driving to my son's and happened to look at the tac and the engine was turning at 2000 rpm's driving at the speed of 55 mph. I have an appointment at the Buick dealers sevice shop in the morning. I called the service manager and he said it could be a thermostat or something else not too expensive. I'd just like to know what you think it could be.
Thanks in advance.
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Wednesday, September 3rd, 2008 AT 10:58 AM