If an automatic transmission fails to shift smoothly under acceleration and is instead making noises, creating vibration, or showing signs of altered shift behavior, a check of the transmission fluid and filter are in order.
At the same time, a check for leaks should also be conducted. Repairs for automatic transmissions range from resealing (to stop leaks) to a complete overhaul or replacement.
TIP: Automatic transmission fluid should be checked at least twice a year. Keep in mind a transmission maintenance service will not correct internal damage.
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