Transmission erratically shifts from 6th to 5th on a slight uphill grade CX-9
My 2008 Mazda CX 9 jerks when going up a slight incline. I have notice it seems to be shifting erratically from 6th to 5th. I am not 100% positive on this. Sometimes I see the gear indicator shifting and at other times it does not. This could be simply that it is shifting faster than the indicator will show. Not really sure.
I took it to the Mazda dealer I purchased it from. They told me it needed to have some updates and needed the transmission flushed. They did this. Now it seems like it might be a little better, maybe not so violent but still doing it. It may not have done anything, it is really hard to tell. I called them back and now they say the fuel injection may need to be cleaned. It seems as though they are just using the process of elimination, which can be expensive. Seems to me a dealer should be diagnose an issue with much process of elimination if none at all.
I took it to the Mazda dealer I purchased it from. They told me it needed to have some updates and needed the transmission flushed. They did this. Now it seems like it might be a little better, maybe not so violent but still doing it. It may not have done anything, it is really hard to tell. I called them back and now they say the fuel injection may need to be cleaned. It seems as though they are just using the process of elimination, which can be expensive. Seems to me a dealer should be diagnose an issue with much process of elimination if none at all.
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Thanks Sharkman73! I would be interested to know what you find. I find it strange that it could be fuel related because it really feels like a transmission issue, but it doing research I have found a lot of talk about it being fuel or fire related. Stern2, that is interesting, I was actually probably going to try replacing the plugs after hearing this somewhere else. I generally do this type of maintenance on my own vehicles, I wonder how much trouble it is? I once enjoyed doing it, but as I have gotten older it seems to have lost some of the 'joy'! On another note, someone with a different make/model vehicle told my wife their car was experiencing the same issue. They replaced the fuel filter and solved their problem. In doing a little research I have become a little puzzled as to whether or not this can be done on a Mazda 2008 CX 9????
Other than the spark plugs being replaced, are there any other repairs which have resolved the issue for any of you?
In addition, a new issue arose last week. The transmission for the vehicle was "sticking" in 3rd and 4th gears when descending a hill, even with my foot pressing down on the gas, and not shifting into the next gear until around 3000-3500 RPMs. Has anyone else experienced this?
Changed plugs - corrected the problem