I don't think most OBD2 reader can read ATF temp. You'll need pro level scanner to read ATF temp.
DIY 2016~2021 CX-9 DIY Transmission Fluid Drain and Fill + Filter Change
- Thread starter Silly Wabbit
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I don't think most OBD2 reader can read ATF temp. You'll need pro level scanner to read ATF temp.
Damn so just follow post #3 and forget about the temperature at 122deg? The temp is making me nervous pn the next trans oil change lol
I wouldn't worry too much about the temperature.
Mazda 6 speed AT isn't too much different from my MDX's 6 speed AT. I do drain and fill the same amount drained. Just don't do it when the ATF is too hot or too cold. Or, you can drain and let it cool down to ambient temp. Use very large container not to spill any, measure carefully. Drive for 15 minutes or so, check the ATF level. A bit more or less isn't going to kill the transmission. If too much, siphon out some, no big deal.
As long as CX-5 has an ATF dipstick, transmission service is much easier than those newer cars without one.
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- Plano, Texas, USA
Not like engine oil, ATF is a lot more sensitive on thermal expansion and contraction to the temperature. If you don’t take ATF level measurement at exact 122°F while the engine is idling, the reading on the dipstick most likely is off.
Mazda’s SkyActiv-Drive 6-speed automatic is unique to the traditional 6-speed auto such as the one on your Acura MDX. Mainly SkyActiv-Drive 6-speed auto uses a lock-up multi-plate clutch in torque converter for EVERY gear to transmit power at the speed over 5 mph.
The main problem for doing this way on ATF drain-and-fill, to fill the same amount of ATF drained, is it’s been proven many times that Mazda has a habit of UNDER-FILLing the ATF in its SkyActiv-Drive 6-speed automatic transmission from factory.
Yes.
Wait so what is the best way to do a trans filter/fluid change w/o a obd II scanner?
Edit
21 cx-5 gtr (turbo)
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- Plano, Texas, USA
On CX-5’s with blue cold coolant indicator light, the light turns off at 131°F coolant temperature. Some use that as an indicator to check the ATF level when the blue light just turned off. They assume the ATF temperature is about 122°F at least in ATF cooler.
Yes, ATF is more sensitive than engine oil. But its thermal expansion rate is less than 5% (not my experiment, but a few did crude experiment), not a huge difference. Also, Mazda ATF dipstick shows wide range of acceptable ATF level, a little less or more isn't going to blow the transmission.
I'm not implying Mazda CX-5 and Acura MDX have the same or similar transmission. Only they fluid can be swapped similar way. They both have small dipsticks and drain hole, I'm certain you're aware of this.
I stated to check the ATF level after driving around 15 min or so. I admit after 15 min of driving, the ATF temp will probably reach much higher. Only about 10 min idling and going through the gears should bring the temp to 122℉(50℃), which is 24℉(13.3℃) higher than human body temp.
You should be able tell the ATF has reached correct temp range by touching the tranny pan and feel a bit warmer than your body.
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Coolant temperature rises much faster than any other fluids, leading resulting in incorrect ATF level by using above method.
2021 CX-5 doesn't have BLUE coolant temp indicator light.
Looks like you're going to do some (more like a lot more than others) maintenance yourself, I suggest you should invest in a good pro level scan tool. Scan Gauge II is a good one and not very expensive. Autel Scanner MaxiCOM MK808, a bit high but it'll pay itself in no time.
https://www.amazon.com (commissions earned)
The Autel MaxiCOM MK808 is $449 after coupon.
ScanGauge ii is $159: https://www.amazon.com (commissions earned)
I wonder which Scotty Kilmer uses lol
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- South Carolina
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- 21 CX-9 13 CX-5
Holy moly, that Autel is a steal! I just ordered one, thanks! I have a Foxwell now, and it's good, but it's not touch screen, and can only track one PID at a time. After I get used to the Autel, I'll sell that one.
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- Plano, Texas, USA
If the ATF thermal expansion and contraction to the temperature is insignificant, all car manufactures won’t specify a required ATF temperature while checking the ATF level.
I won’t say Mazda ATF dipstick shows “wide range” of acceptable ATF level, especially the workshop manual says to adjust the ATF level if the reading on the dipstick isn’t on the small “center marking area” of the dipstick.
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- Plano, Texas, USA
More discussions here:
Anyone found an OBD2 phone app that will read transmission fluid temp?
Guide ATF Drain/Fill
2016.5 CX-5 Transmission fluid change questions
Transmission fluid change without filter replacement
Some OBDIi readers or scanners don’t display Mazda’s ATF temperature. Some display “fake” Mazda’s ATF temperature by using coolant temperature value.
Don’t think he uses any OBDII readers or scanners ⋯
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- Plano, Texas, USA
Of course many use (free?) FORScan Lite to get ATF temperature readout.
2019 CX-5 Diesel Aftermarket Transmission Cooler
2019 CX-5 Diesel Aftermarket Transmission Cooler
Just downloaded it off Google play store ...
View attachment 303017
FORScan Lite for Android
v1.5.11
Kernel v2.3.41
The Bluetooth plug-in obdii port link is one of the recommended units from ForScan website ...
https://www.amazon.com (commissions earned)
I also purchased the vLinker USB cable to run it from a Windows based laptop in the future (but you can break stuff with that!)
I will wait till it goes back down to $330ish lol
Oh man thanks for the links. Does the Autel MaxiCOM MK808 read the Mazda ATF? Hopefully user theblooms will let us know.More discussions here:
Anyone found an OBD2 phone app that will read transmission fluid temp?
Guide ATF Drain/Fill
2016.5 CX-5 Transmission fluid change questions
Transmission fluid change without filter replacement
Some OBDIi readers or scanners don’t display Mazda’s ATF temperature. Some display “fake” Mazda’s ATF temperature by using coolant temperature value.
Don’t think he uses any OBDII readers or scanners ⋯
Hey the blooms can you let us know if this can read Mazda ATF temperature since you bought one. Thanks
I believe Autel MaxiCOM MK808 can read ATF temp.
I use an older Autel Maxidiag Elite MD802 All Systems since 2016. It scans all systems including ABS, AT and live data, but no ATF temp, good enough for an home user. I've been thinking to get a Scan Gauge II, but I can do 2 vehicles ATF changes without it. Maybe later when I feel other use for it.
IMHO, and in my own case, finding a true level place is more important than ATF temp. My driveway is severely angled, garage floor is a bit less but still too much slanted.
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
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
https://www.amazon.com (commissions earned)
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