Guide 2016~2021 CX-9 DIY Transmission Fluid Drain and Fill + Filter Change

Here's a very useful tool to separate oil pan from aluminum tranny housing;

Oil Pan Separator Tool


Once the pan was removed, use this solvent, use plastic blade after 10 minutes or so;

Silicone Gasket Remover, Motorcraft ZC-30-A
The trans oil pan was like $26 before shipping with no tax at partsouq.com so not much savings vs silcone dissolver at $19. Hopefully I wont need the separator at around 60k mi lol
 
The trans oil pan was like $26 before shipping with no tax at partsouq.com so not much savings vs silcone dissolver at $19. Hopefully I wont need the separator at around 60k mi lol
You'll have to separate the pan from aluminum and still need to clean up the RTV residue on mating surface without much scratch as possible..
 
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South Carolina
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12 MZ5 13 CX-5
There's your answer, right there! The MK808 absolutely reads trans temps!

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There's your answer, right there! The MK808 absolutely reads trans temps!

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Oh wow nice.

Btw my Civic just had a check engine light on right after I installed the transmission mount. All I removed was the air cleaner box and unplugged the mass air flow sensor, loosen the ecu bracket and wiggled the ecu around along with the fuse box. I did not inplug the ecu nor the fuse box just wiggled it a few times. I guess I can bring it in to Orielkys somce they have free check engine light obd ii scanning. Has anyone tried Oriellys?
 
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South Carolina
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12 MZ5 13 CX-5
Btw how long did it take to read 122 deg? Also whats your location and time of reading?
The car was key on engine off when I did the reading, and it hadn't been cranked for about an hour and a half. I didn't monitor it to see how long it took to hit 122, I just was checking to see if the PID was able to be read.
 
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Northeast
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2020 CX-5 Tour
Btw how long did it take to read 122 deg? Also whats your location and time of reading?
If you're considering the idea of deriving tranny fluid temp by using the observations of others (or by any other 'estimation' method for that matter), I urge you to not do that. You need to be aware that TFT is very much affected by ambient temp and length of vehicle down time.

So the length of time for the fluid to reach the target temp can differ quite a bit, depending on the two variables above. And that's true even when just comparing multiple warm-ups of your own vehicle, if ambient temp and/or down time is quite a bit different each time.

So if you want to do this job right, and not potentially damage your transmission, then get one of the tools which correctly reads the TFT pid on your vehicle. If I didn't already have something, I'd take a look at FORScan Lite, which yrwei52 and others have mentioned previously. The acid test of a valid reading is for the TFT values to be quite a bit lower than ECT, during a warm-up of a completely cold vehicle. And TFT will not catch up to ECT for a long time either - perhaps as long as 20-25 minutes.
 
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Mazda
The actual coolant temperature indicator light deactivation on cold engine start up if you independently test and check is 129.9F. You can't go by the OBDII in this case because of scaling on reporting in the original programing form the ECU.
The temperature of the transmission is directly related and monitored about the same as the coolant. A better way to read the temperature is in the pan. That temperature is what will be run back through the transmission after any cooling effect by supporting fluid coolers.
It's my opinion that most all and MAZDA automatic transmission run on the hotter side for my comfort. I personally run an aftermarket cooler and even in extreme temperatures of summer seldom does my ATX temp raise above 180F measured with a analog gauge with the sender mounted in the stock oil pan. The coolant will get to about 205F-210F running the AC on max. with ambientes in the 100F plus temperature's. I will be addressing that this year. A BIG ARSE COOLER! I found that best performance and mpg is when the engine is at 185F coolant IATs at least the ambientes and the transmission at or below 180F . A transmission can heat up the engine coolant if it is not controlled efficiently and vise versa.
The fluid level in most Mazda transmission pans can safely support safe transmission operations as long as the fluid dip stick is at least at the mid point. I believe that a sustain 40 degree angle even if indicating at the 1/2 full mark on the dip stick would still pick up fluid from the sump? That is an "best guess" based on measuring the pans capacity and where the fluid picks up in the pan.
 
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