Last post on Apr 16, 2013 at 6:16 PM
You are in the Mazda CX-7
What is this discussion about?
Mazda CX-7, SUV
#112 of 165 Re: Unexpected downshifting from 6 to 5 while going 70-80mph [sigridq]
Dec 19, 2006 (7:18 pm)
My guess is that either the road isn't as flat as you thought, or your pressure on the gas pedal wasn't as even as you intended. A nice headwind could add into the equation, too.
My experience has been that the CX-7's tranny is real sensitive to 6-5 downshifts. I think it's because the car is geared so high, and it is trying to stay in the powerband - and even the slightest hill or pedal provocation might make it think it needs a downshift.
This isn't really the solution, but you could always slide it over into manumatic mode and then it wouldn't downshift.
The other idea would be to make the same trip with cruise control on. If it still downshifts, it's probably the road and/or wind that's suggesting the gear change.
#113 of 165 Re: Unexpected downshifting from 6 to 5 while going 70-80mph [sigridq]
Dec 19, 2006 (9:27 pm)
I can't confirm for sure, but in my travels around the web I'm pretty sure I read that there's a software update that fixes some of the tranny issues. I can tell you that I bought my CX-7 the end of November and specifically asked that the car have the latest PCM/ECM Flash and new gas cap for delivery. I haven't had the downshift problem some have reported.
#114 of 165 Re: Unexpected downshifting from 6 to 5 while going 70-80mph [sigridq]
Dec 20, 2006 (4:17 am)
I've had mine since early June, 11K miles now. The tranny does that periodically and it's normal.
#115 of 165 Re: Unexpected downshifting from 6 to 5 while going 70-80mph [sigridq]
Dec 20, 2006 (5:30 am)
Your tranny is still in the "learning" mode... It will take a couple of thousand miles before it adjusts to your style of driving, but it will and the downshifting will disperse.
If it however does it for extended periods of time, then you might want to notify your dealer just in case.
#116 of 165 Re: Unexpected downshifting from 6 to 5 while going 70-80mph [vbbuilt]
Dec 20, 2006 (5:32 am)
Thank Vince, I've been reading the message board and am finding that my problem or should I say situation, is not unique. But I am still going to document the instances and tell the service dept. whenever I bring it in for service. Just in case anything happens, I want to be prepared.
#117 of 165 Cruise Control
Dec 21, 2006 (4:50 pm)
I've noticed that using the cruise control on the freeway the car always stays in 6th, even up some pretty significant hills, whereas it will downshift to 5th at any incline otherwise.
#118 of 165 Re: Cruise Control [rex10]
Dec 21, 2006 (5:24 pm)
The car should NOT stay in sixth, even with cruise on. It should shift as required to maintain the set speed, same as you would do if not using cruise. Cruise is supposed to maintain as constant a speed as possible, not to maintain a particular gear.
#119 of 165 Re: Unexpected downshifting from 6 to 5 while going 70-80mph [sigridq]
Dec 22, 2006 (4:55 am)
I wonder if the "problem" is that the car is turning such low revs it is in decisive as to what gear it should be in. If I am traveling between 65-70 mph and I encounter a slight incline it seems as if it thinks it should not downshift but does anyway. Latley I have been driving in manual mode and if I get to the same spot where it wavers in shifting I downshift and keep the engine in the ideal rev range. This seems to work, but of course takes away the automatic idea of the car. Also, I have noticed that my mileage has increased when driving in manual by keeping the revs in the 2000-2500 range on all upshifts.
#120 of 165 Brake rotors replaced - 194 miles!!!
Dec 22, 2006 (8:21 pm)
Ok, so the CEL went on at day FIVE and on day SIX there was this terrible shimmying on the steering wheel when I had to brake quickly a few times. Took the car in on day SEVEN (194 miles)and they fixed the CEL (gas cap) and replaced the brake rotors. Now, is this typical of such a new car? Do I have any recourse on this?
Mazda Corporate not available until at least Tuesday. This is not the dealer's or service people's fault, but MAZDA. Please advise, thank you,
#121 of 165 Re: Brake rotors replaced - 194 miles!!! [maggiesueb]
Dec 23, 2006 (9:48 am)
On my Audi A6 which I drove for 100,000 miles before selling and purchasing the Cx-7, the front rotors were replaced 5 times because of brake shimmy at highway speeds. Finally put on aftermarket drilled Zimmerman racing rotors and that stoppped the brake shimmy.
Have found the brakes excellent on the Cx-7, one of the reasons for buying.... something odd must have happened during the manufacturing process on yours.