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Mazda CX-7 Transmission Questions
Mazda CX-7 Transmission Problems
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The big thing thus far that I am disapointed.
1) Driving on the interstate 70mph through rolling hills the transmission jerks while trying to decide if it should change.
2) I thought with all the turbo advances that turbo lag would not be noticeable, but it is. I'm told it will improve? I have 400 miles so far.
-juice
Vince.
TUNING anyone. I want to buy a chip, and xenon lights.
-juice
People who are exploring the CX-7 and trying to gain useful information will immediately get the wrong idea that the CX-7 has major problems with the transmission, which is not the case.
Perhaps retitle that forum to "Mazda CX-7 Transmission - General Discussions"?
Someone mentioned that the CX-7 has Adaptive Logic. I don't know what that is. Can someone explain how it works and it's advantages?
Thanks, Vince.
Driver-Type Recognition
Environmental Recognition
Driving-Situation Recognition
All can be explained on this link: Adaptive Transmission Control
It's extensive in the definition, but it answers tons of questions!
Still not certain if the CX-7 has adaptive or not...
6-SPEED SPORT AUTOMATIC TRANSMISSION
Experience the best of both worlds -- the convenience of automatic and the authority of manual. In automatic mode, sensors and internal algorithms adapt shifting logic based on your driving style. The Sport AT shift gate allows quick manual shifting when you want to take a more active role in the CX-7's performance. In either mode, six forward ratios keep the engine in the sweet-spot on acceleration and deliver smooth and relaxed straight away cruising.
Thanks for the explanations!
Vince.
But if you're not sure, seek peace of mind and call before you drop off the car for a good two hours of your time!
I can say for sure that at 70 mph in manual 5th it does not jerk. It's ready to fly.
There are two elements at work here: you are getting use to the CX-7 and the CX-7 is getting use to your driving habits from older vehicles.
Keep in mind that if somebody else drives your CX-7 for a couple days it is going to un-learn your way and learn the other person's habits.
fowler3
Vince.
I still love my Mazda except for the jerking at highway speeds that irratates the crap out of me, and my a/c shut down a couple of times. I still don't know why or what happened.
It's good to know someone else is having the problem, (misery love company) and Mazda knows about it. I was on the road a lot recently and the only time I had a chance to visit a mazda dealer they had never heard of any problems nor were there any dealers/ factory messages yet.
I hope they do in fact fix the problem if not I will get rid of it. Yes it's that bad. It would hurt either if Mazda somehow trys to make this right. I didn't want to buy a test vechicle. later
I manually shift to 6th above 38 mph because I think that lowering the rpms by 200 revs over the long run will save just a mite of gas. Not that I am frugal, but as long as I cannot drive above 55 mph in a severely policed area, why use the oomph that a lower gear will provide.
Any remarks are welcome.
Thanks,
NMK
My CX-7 only does it for a few minutes, during which time I'm usually trying to defog the windows, change CDs, get buckled in, etc. Shifting into gear at 2000 rpm is your choice, but nothing to worry about - that's what a torque converter is supposed to handle, and once a day during the winter certainly isn't going to kill it.
-c92
I let my 7 idle for about a min or 2 till the tach levels as 1.
Vince.
testing itself. That is the only time I have heard a similar noise.
They replaced the TCM and reflashed the TCU. It seems to be running perfectly now.
My dealer has done the Lag Below 2500RPM Reflash, P2006 CEL IMRC Replacement, Stuttering in Cruise Reflash and I still have the so called Transmission Clunk on the first forward departure of the day - normally at the 1 to 2 shift.
Evidently, the clunk is normal as described in Mazda Canada Bulletin 06-07 issued 12/06 - Clunk Noise From Brake Pedal When Accelerating From A Stop. The copy that they provided for me states that - The clunk noise is most likely to occur after a night soak. This is a normal operating noise of the ABS. It happens when the vehicle reaches approx 10KMH/6.2MPH when the pump motor in the DSC Hyd Unit starts operating and malfunction diagnosis is performed. Do not attempt any repairs.
Being the skeptic that I am, I tried it out the next morning with the trans in Auto Mode. Sure enough it clunked at the 1 to 2 shift. The next day I tried in Manual Mode where the trans did not shift; however, it clunked at exactly 10KMH. Therefore, I now believe that Mazda is correct here. The concern that I have now is that it did not happen when the car was new but it has started occurring over the past 2000KMs and seems to be getting louder. I fear problems with this component down the road.
The stuttering in cruise is interesting. In 6 Gear in Auto Mode at 110Km/70MPH at about 2200RPM, the trans seems to shift out of lockup mode under the slightest load such as a minor incline in the road. RPM increases to 2500 or so & will hold there until the road levels out again. If the same scenario is encountered in Manual Mode, lockup is held much longer but after a while the engine seems to start lugging (stuttering) and finally it will come out of lockup, increases to 2900RPM then slowly decreases to 2500RPM until it the road levels out. I did a 2 hour return test run today in no wind, on a quiet divided highway with many gentle hills. I estimate that in 6 Gear in Auto Mode, the trans was NOT in lockup approx 60-70% of the time whereas in Manual Mode it was NOT in lockup about 20-30%, albeit with some stuttering.
Not being in lockup while cruising seems to me to be negatively impacting hwy fuel economy. Furthermore, I suspect that the continual shifting in and out of lockup in Auto Mode might be detrimental to the longevity of the transmission.
My 2 cents worth.
In my CX7, it defintely is NOT a transmission shifting problem.