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Mazda CX-7 Transmission Questions

91 messages,  Last post on Jun 03, 2009 at 2:22 PM

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What is this discussion about? Mazda CX-7, Transmission, SUV

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#42 of 91 Re: 'klunk noise' in CX-7 [zoom49] by coolbowling Feb 12, 2007 (4:54 pm)
Replying to: zoom49 (Feb 12, 2007 5:59 am) I have driven a lot of other cars with ABS and other similar features as the CX-7 without the 'klunk noise.' It's extremely annoying and I hope Mazda can come up with some kind of fix for it. And if it doesn't happen in every CX-7, it can't be normal. Replies to this message: zoom49 (Feb 12, 2007 9:05 pm) coolbowling (Feb 12, 2007 11:51 pm)
#43 of 91 Re: 'klunk noise' in CX-7 [coolbowling] by zoom49 Feb 12, 2007 (9:05 pm)
Replying to: coolbowling (Feb 12, 2007 4:54 pm) So does the Klunk noise happen on most 1 -2 upshifts or only on the first shift after the transmission is shifted out of park? This klunk noise is also on my RX-8 with manual transmission and is due to an ABS test. Replies to this message: coolbowling (Feb 12, 2007 11:51 pm)
#44 of 91 Re: 'klunk noise' in CX-7 [zoom49] by coolbowling Feb 12, 2007 (11:51 pm)
Replying to: zoom49 (Feb 12, 2007 9:05 pm) the klunk noise happens only during gear shift from 1st to 2nd. no noise is made when it's shifted out of park. a regional specialist check it on 2/16/07 and i'll let you know what he says. thanks.
#45 of 91 Jerking transmission and shifting problems by saled May 11, 2007 (10:11 pm)
i just bought a mazda cx-7 and i love it but after about 3 weeks of driving it i would notice when im on the highway it would out of nowhere start to jerk it felt like it was struggling. and also today when i was driving on the highway my car shifted from 6th gear to 5th and stay at 5th and then go back to 6th. is this comman in a new car? Replies to this message: zoom49 (May 12, 2007 8:25 am)
#46 of 91 Re: Jerking transmission and shifting problems [saled] by zoom49 May 12, 2007 (8:25 am)
Replying to: saled (May 11, 2007 10:11 pm) There has been a new electronic program out for a few months that can reprogram the transmission to reduce shudder when driving on the highway. Tell your dealer about your concerns on your first service visit. Should be an easy fix.
#47 of 91 Anyone else feel Shudder? by kkearney May 29, 2007 (10:09 am)
Hi. I just bought an '07 CX-7 Grand Touring AWD with 13k miles on it. Accelerating to 3000 RPM in 3rd gear there is a brief shudder that is felt in the steering wheel. It then disappears when the dropping into 4th. Anyone else feel the same thing? What are your thoughts about potential cause? BTW I drive the car pretty calmly. Thanks Replies to this message: kkearney (Aug 26, 2007 2:57 pm)
#48 of 91 Re: Stuck in gear Transmission [msmith30] by canadiancx7 Jun 22, 2007 (4:41 am)
Replying to: msmith30 (Jan 07, 2007 6:48 am) Hey there....I am from Canada and I bought a CX-7 in December. Had the exact same problem has you did, only they had absolutely NO IDEA what caused it. Been to the dealer 5 times and lost my car several weeks even months. They changed the PCM module, did not fix it, they changed a flow inhibitor did not fix it, the changed the knock sensor, did not fix it. Now it is still at the dealer, apparently they fixed it, some loose connection on the PCM but I have lost total faith in my vehicle. Did they fix yours? If so, please let me know what they did. Thanks...besided that...I love my car. Replies to this message: farupnorth (Jun 22, 2007 7:20 pm)
#49 of 91 Re: Stuck in gear Transmission [canadiancx7] by farupnorth Jun 22, 2007 (7:20 pm)
Replying to: canadiancx7 (Jun 22, 2007 4:41 am) Sounds like I had the same problem. It started with some sort of stutter upon acceleration, then later it developed into something that made the AT & CEL light come on. Soon thereafter, the car would only be in third if it was in drive. (I could shift to reverse & park, but when I tried to get it back in drive, it would go into third.) That earned it a tow to the dealer.   They replaced the TCM and reflashed the TCU. It seems to be running perfectly now.
#50 of 91 My Transmission Observations by exlabdriver Jul 02, 2007 (9:19 pm)
New member here. I thought that I'd pass on my experiences with my Canadian CX7 GT AWD, bought in Jan 07 with a build date of 10/06 - now with about 9900KMs on the clock.   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.
#51 of 91 Trans Observations 2 by exlabdriver Jul 10, 2007 (9:04 am)
Just for fun, I tried driving in Reverse after a night soak. Sure enough, I got the clunk from the ABS self test at about 10KPH/6MPH while going backwards.   In my CX7, it defintely is NOT a transmission shifting problem.

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