05 Mazda Transmission Problems, Advice Please?

Monique

New member
i have a 2005 Mazda 6 automatic with manual shift option, i never use the manual shift. in the last couple of montha i have my check engine light on due to bad oxygen sensors which have been reppaced. that problem is better but most recently my transmission has started changing gears too early. on the dash you can see the gears quickly go up to 4th gear, even when im driving slow below 30 mph. it never did this before, the car would shift normally. now its shifting harder. the fluid level is right. im not sure what to do and cant really afford a trans diagnosis. any advice/tips please.
 
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