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Re: 04 Mazda 3, 3rd gear rpm flare.
I found the problem. The rear cover has a hub that wears out. This hub has the sealing rings, for the direct clutch and reverse clutch, on it. The direct clutch sealing ring groove was worn to about twice the normal width and the sealing ring was broken. It was easy to remove and the new one was only 79 dollars on ebay. Ring kit was 20 dollars on the same site. Total repairs cost around 250 dollars (including Trans fluid, solenoids, Rear cover, Ring kit, and new filter).
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