I'm new to the cx-9, and want to know about how many of you deal with the automatic transmission fluid changing.
I read somewhere that it's a sealed unit, I think I read somewhere someone said every 20K miles, 50K ....
so i would like to hear from you on this.

 

What does the manual indicate?

 

Any fluid pan is serviceable. A filter and pan fluid change should be done no later then between 40-50k miles sooner is better.
The Manufacture claims it to be a lifetime none service transmission but then the manufacture is not going to pay for the breakdown after the warranty period either.
Servicing a MAZDA transmission will not void the warranty



ASE

 

It says its a sealed unit and requires no changing but many experienced Mazda users say to do it around 40-50k

 

Yes it does and normally I would recomend to follow the Factory Service advise... but my experience has simply been that not servicing a automatic transmission will have an effect in the negative at some point in its service life.

Here is my findings and observation 2018MAZDA 3. You can also find somewhere in my thread where I had the transmission fluid analyzed. Look what I found in the transmission pan which is normal for a new transmission during its run-in but I did not want this material to remain in "MY" transmission LOL
https://www.mazdaforum.com/forum/maz...-44018/page18/

 

Recently (this weekend) traded in a 2009 cx9 Grand Touring 189K miles.. I loved that car. The motor was bulletproof.. Had all the minor electrical issues. Last week it started to shudder at around 40mph. Took it to my normal mechanic... he checked it out.. thought it might be suspension, checked all of that... they he realized it was transmission and with it being a closed unit and Mazda saying for the life of the car. I kind of freaked and went and got a 2021 Touring.... just got a call from the dealer my sales guy was laughing telling me that my old car will not drive and the tranny is shot. Dodged a bullet. But I will have this car services every 50k.

 

Yep, good rule-of-thumb is oil/filter change (synthetic oil) every 5,000 or once a year, whatever comes first. For tranny, (whether old kind or the new CVTs) change the fluid every 50,000 miles or 5 years. (But never get it flushed...that's only asking for problems.) I've followed these rules since 1990 and have never lost an engine or a tranny. I, also, tell my friends and family to go to real mechanics (not the quick-lube places and ESPECIALLY not Walmart Auto department) as I've heard too many horror stories of them messing things up and ruining engines/trannies. I've been doing almost all of the maintenance jobs on my and my families vehicles for many years but I do go to the mechanic for transmission jobs and jobs that require a lift.

 

Properly flushing will NOT harm the transmission in any way. Really unless members are certified Auto motive technicians or have long experience with properly servicing automatic transmission stop post BS you find on the internet. First of all it show a ignorance to the benefits flushing does If done Properly. and with a machine specially engineered and design for the service . Also in almost every case that a transmission had issues after a Flushing it was directly cause by a worn out transmission or damaged parts.

Point really before you posts thing about a subject try top completely research it first!

If you think any of what I said was incorrect please post your experience service based information, site the exact shop or transmission that was damaged by a properly serviced and flushed transmission and let review all the facts and details !!!


I am certified ASE Master Technician for over 30 year s and own operated and managed many service related shops as well have done at least a 100 or more complete Transmission flushing and not one time ever had a transmission fail because of this properly service procedure.

You know for all you that keep running to the internet try to get your information first before believing all the crap that is posted on the WEB


ASE Master Technician L1/L2 certified and current
Members may also review this thread before you decide to challenge my response!!!!!!!!!!
Point is if you do be prepared to post real data and information and not hear say BS! This means service shop write ups or actual invoices to the service s performed on the transmission , and even oil analysis if they were ever done .

https://www.mazdaforum.com/forum/off...-living-44406/

You may also look at my thread in which I have already done a transmission service on my 2018 Mazda 3 with less that 35k miles! Take notice of the oil data analysis I had performed to support my thoughts to do a service as soon as I did!
https://www.mazdaforum.com/forum/maz...like-do-44018/

 

There was no bullet dodged only that you went over 100k miles without a full automatic transmission service. Many auto makers use an old school thought that a vehicle gasoline engine life expectancy is 100,000 miles. They loosely imply and call this life time. There is actually a lot of documentation that can support this if you know where to look or who to contact and talk at the engineering and product development departments of auto manufactures. There are very few permanently sealed transmission "life time " transmission and none that I know of will void the warranty of a transmission if you do a filter replacement service. NONE. If someone has information stating to the contrary please post the documentation form the auto manufacture stating that it will void the a warranty if a service of filter replacement or even a complete fluid replace is done during the warranty period of any gasoline power vehicle!
Before you post I would advise to completely read and understand the The Magnuson-Moss Warranty Act.

If you do think you have information [size=13px]contrary[/size] to what I post please site the auto [size=13px]manufacture[/size] and the information from that auto manufacture that otherwise shows my [size=13px]information[/size] inaccurate!


I really hate all the MYTH that keep being fed on almost every automotive forum anywhere in the world! LOL

 

"Properly flushing will NOT harm the transmission in any way." Agree. I've had very good results with home flushes...drain & refill the sump, then with a hose from the fluid line to the cooler into a bucket, pump some out, add fresh ATF, pump more out, add more fresh...do it right and the results are good.

Some people wait until the transmission shows signs of dying and hope that a flush will fix it. Too late. The transmission dies and the flush gets the blame.