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Transmission whining noise

[Volvo 140]

Why do I hear a whining noise on acceleration and deceleration?

A whining noise from the transmission during acceleration and deceleration can often be attributed to faulty pinion bearings in the transmission. Generally, what happens is that the bearings begin to get pits in them due to excessive wear or dirty transmission oil. Catching the pinion bearings prior to complete failure will result in less cost during a transmission repair!

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