I have a 2010 mazda 3 with a 5 speed auto transmission. The transmission slips badly when it II try to accelerate quickly while it is still cold , it gets stuck on 2nd gear unless I manually override it. The problem goes away after about a minute of driving and the transmission starts shifting normally. I have just changed the atf and the transmission filter still the problem persist. When I scanned it today I got these codes
P0732, P0841 & P0894
I don't know if this is related or not but the motor mounts appear to have gone bad. I'm not sure if they are contributing to the problems or not
Well, to start, you can look up your codes here: https://repairpal.com/obd-II-code-chart
Now, the motor mounts? IDK, but don't forget that your transmission has electronic and mechanical connections to your engine control computer and gear lever, etc. I could see where motor/trans shaking and moving could screw up the connectors/links.
I'm having the motor mounts changed on the weekend, we see from there.
The link you sent is not working
Bad mounts are bad news for the engine and transmission. That kind of jarring, over time, can damage both components.
As for the fluid exchange: The exchange sounds like it was a "drop the pan" and "drain and fill" rather than a flush. So, apparently you did the right thing, in that regard. Tranny flushes, on the other hand, are "bad, bad, bad."
Question: Was the ATF fluid replaced with OEM fluid? Here's the link to the Mazda page, on recommended ATF type for your vehicle: https://mazda.oemdtc.com/698/automatic-transmission-fluid-atf-2000-2016-mazda
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Most notably, it says the following (their caps)
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ALWAYS BE SURE TO USE THE CORRECT AUTOMATIC TRANSMISSION FLUID WHEN REPLACING ATF. USING THE WRONG ATF MAY CAUSE SHIFT QUALITY COMPLAINTS OR MAY EVEN DAMAGE THE TRANSMISSION.NOTE: ATF M-V (TYPE M5) IS NOT THE SAME FLUID AS MERCON®V OR MERCON®LV . . .
USING ATF OTHER THAN ATF M-V (TYPE M5) IN AUTOMATIC TRANSMISSIONS DESIGNED TO USE ATF M-V (TYPE M5) MAY CAUSE SHIFT QUALITY COMPLAINTS. USING ANY OTHER ATF OTHER THAN THE SPECIFIED ATF IN AUTOMATIC TRANSMISSIONS MAY CAUSE TRANSMISSION DAMAGE. USING A GENERIC, MULTI-PURPOSE OR UNIVERSAL ATF MAY CAUSE TRANSMISSION DAMAGE.
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So, what kind of ATF fluid did you use? I'd start there.
I used atf m V. Although this is a 2nd hand vehicle so I have no what the previous owner used because when I first got it a noticed that the transmission fluid was over filled by about half a litre, so I drained out the excess fluid out. But it was shifting perfectly then
OK. Reading transmission fluid level (assuming that there's a dipstick on this thing)is a tricky business: You might be misreading the level of the fluid. Occam's Razor: The simplest is often the best. Put a bit more fluid in the tranny, and see if that helps, since it was shifting fine before the service. You can easily remove it, if there's no change.
On reading the dipstick, see this, from AgcoAuto (with pictures): http://www.agcoauto.com/content/news/p2_articleid/89
I meant shifting was fine when I first got the car despite the overfilling and subsequent draining of the excess fluid . Problems started a few months later which is when I decided to change the fluid to see if it made any difference.
About checking the fluid level I am almost certain I am checking it properly.. I'm doing it according to what the owners manual is saying
OK, that's clearer. Thanks for the clarification. How many miles on the Mazda 3 when you bought it? How many have you put on, since?
It had just under 45k miles when I got it. I have put around 16k miles on it. Although most of the miles I have put were highway mileage
You're going to need someone, perhaps an honest diagnostician, to run some scans, particularly on the transmission solenoid. Perhaps a solenoid has gone bad, and the problems that you're having aren't related to the fluid change. As they say in science, correlation isn't causation. Enhanced diagnostic scan data is needed, IMHO,