Mazda - Transmissions - Protege5 :: 2002 - Sudden Downshift At Approx 60 Mph


May 1, 2011

I have a 2002 Mazda Protege5 (auto trans, 80k) that will occasionally make a sudden downshift at approx 60mph. The car will lurch, the speedometer briefly goes to zero (while the car is maintaing speed) and then within less than 5 seconds, the speedometer (dial type) will return to proper speed reading and car will upshift back to proper gear.

This seems to happen around 60 mph and also occasionally happens on highways as the car begins to go on a downslope while maintaining highway speed. This happens frequently but not on every trip. When first happened, took to shop, they found AT fluid very dark and flushed and replaced AT fluid and filter. Problem not eliminated.

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