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Help me diagnose this engine noise- 2002 mazda protege?

Jun 22, 2009 by Blueearth423 | Posted in Maintenance & Repairs

I hear a tinny, rattling noise as my automatic trans is about to shift. I discovered today that the noise is always produced at 2500 rpm. Do you know what this might be? Thanks in advance!

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A Mechanic | Jun 22, 2009

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