25000 Mile service?
 

Hello,

I am a Newb here, so please bare with me, lol. I work in a body shop so I do have some experience.

I have a 2008 Mazda 3 hatchback 2.3L. Automatic trans. I'm about to hit 25000 miles. I bought it new in 2008. Here are my questions:

I noticed people saying to change the Trans oil at 15,000 or at 30,000 and not the 60,000 Mazda tells you. Is this true for the 2008 cars as well? Also should I just flush it and refill it or do the filter as well? How many quarts to fill this trans? And what Oil and/or additive?

I plan to replace the Cabin filter. It has never been done.

Also I recently noticed a steering wheel shake at 50 mph. But the wheels are tight ball joint wise. They do have a good amount of wear to the tread. 25,000 seems to early to change the stock tires. Yes/No?

Anything else I should be looking to do at this point for Maintenance?

Thanks for ant help.