Manual 7 speed shifting issues survey

Poll: Do you have any shifting issue with your 7 speed manual transmission?

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Thread: Manual 7 speed shifting issues survey

  1. #1
    Senior Member 911Hunter's Avatar
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    Manual 7 speed shifting issues survey

    Hi C7 owners,
    I will like to run a survey only for C7 owners.
    Do you experience any shifting issue with your 7 speed manual transmission? Please participate on the survey and explain which type of related issue do you have in your C7 shifter. Were you able to solve it? How?
    Thanks for your feedback.
    Last edited by 911Hunter; 06-12-2017 at 06:13 PM.
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    Senior Member meyerweb's Avatar
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    No issues. It's not the slickest manual I've ever had, but it's far from the worst, too.
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    Senior Member frankieb's Avatar
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    No problems here except when cold (35 deg)1 to 2 is a little hard to get into gear.
    docjb, Boomah, shihhanchow and 1 others like this.
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    Senior Member George's Avatar
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    Although they're minor, and I far prefer it to the A8, the M7 does have some issues. They've been well reported in various threads. For me the shifter is just not as smooth as it should be, including very rough cold shifting into second. Also, under heavy power it's too easy to miss some gates.
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    Member George_L's Avatar
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    1st to 2ND shifts are rough until the transmission fluid gets to operating temperature.
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    Senior Member mybluecorvette's Avatar
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    Not as smooth as some shifters and the clutch has to be substantially depressed to prevent grinding. It takes a while to get use to the higher gears but once you drive it for a while you will seldom miss the higher gears. I would rate it 8 out of 10.

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    Senior Member TNSQUIRE's Avatar
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    I replaced the stock shifter with the MGW short throw. Vastly improved. Highly recommended. Not a difficult DIY project.

  9. #8
    Senior Member CoyotesGator's Avatar
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    2016 7M owner here.

    1 - 2 shift is unuseably bad when cold.

    Every once and a while it will kick out of second gear after 4 or 5 seconds.

    FWIW, rev match seems to help even though I don't have a problem matching the shift.

    I now go 1-3 in the morning until warmed up.

    Note, I am on the Gulf Coast and it is rerely below 40f.

    Crunches into 4th sometimes when cold.

    MGW shifter in route as dealer and GM were unresponsive.

    Unless they wrapped my hair ties exactly like I left them, they never did the requested shifter alignments(yep, plural.)

    As to hitting right gates, your success improves greatly with use.

    Manual trans cars that I Have owned.

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    I had zero problems with my OEM shifting/trans in the first four gears, not even the above issue some have noted, e.g., with shifting when it is cold.

    Found that shifting among the top of gears was not precise, that in order to get 100% smooth shifting, both up and down, between 5/6/7 that I needed to totally concentrate, shift a touch slower. And if I just shifted at top speed without full concentration, sometimes (maybe 15% of the time), the shift from 7th to 6th, ended up in 4th, or the shift from 4th to 5th ended up in 7th.

    Solved all the above by installing the MGW shifter. Was, and still so enamoured by the increased ease and precision of it, that I suggested to Tadge that he have one installed into his C7 and try it for a month.
    Last edited by elegant; 06-12-2017 at 10:19 PM.
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    Senior Member RoninX's Avatar
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    The only time I've had any trouble shifting into 1st or 2nd has been when it's very cold, below 20F. And in those cases, pushing the lever hard got it into gear.

    Overall, I'd say it's a good shifter, but not one of the best. Both my Z4 and my Prelude had smoother, more precise shift actions.
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    Senior Member Richard Brubaker's Avatar
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    Quote Originally Posted by TNSQUIRE View Post
    I replaced the stock shifter with the MGW short throw. Vastly improved. Highly recommended. Not a difficult DIY project.
    I did the same and love it. Driving it around VIR track last Thursday had 0 miss shifts.
    Last edited by Richard Brubaker; 06-13-2017 at 04:18 AM.

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    Senior Member 911Hunter's Avatar
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    Question

    From answers received until now seems that not all 7 speed transmissions are affected by rough shifting, just about a 30-35% of users, general consensus seems that is not the slickest shifter but issues could be solved by installing a MGW short shifter or adapting your way of shifting or to live with it. Maybe GM engineers should go back to the basics of a 6 speed transmission like the Mazda's Miata which has a very loved shifter, also another good example is Porsche 911's 7 speed transmission which has the 7th. gear lock out feature that driver can activate while speeding in order to prevent a miss shift. I wonder of why the 6th. gen Camaros came out with the 6 speed manual transmission instead? Do they have this type of issues in their shifting? Interesting to know.
    Last edited by 911Hunter; 06-13-2017 at 04:57 AM.
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  14. #13
    Senior Member Petercwelch's Avatar
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    No problems at all.
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  15. #14
    Senior Member mjgraniero's Avatar
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    3,200 miles in and no problems so far.
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  16. #15
    Senior Member Jerry U's Avatar
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    Drove my September 2013 built M7 for 3 1/2 year. Now have a Grand Sport M7. Love the trans, particularly Rev Match in "normal driving." Having only had standard shifts for my DD since my '41 coupe when a teenager I'm very good at heel-toe at higher rpms. However modulating the throttle when cursing in 5th and making a turn and going directly to 3rd is not nearly as easy. Rev Match makes a "perfect" transition every time!

    Also learned to use the shifter springs early-on and that is was silly going from 7th, the 3rd overdrive, down through 6th and 5th to get to direct drive 1:1 4th when existing and interstate! Just pull back with no side force and the springs bring you directly to 4th. Also use that when passing an 18 wheeler on the Interstate. Minimizes exposure to rocks and trooper radar!

    One issue I have found is can't skip gears and with the clutch depressed go into an intermediate gear to spool up the cluster gear (a habit I had with prior transmissions.) It confuses Rev Match. Have to go directly to the gear you intend to be in when you plan to engage the clutch (that is warned about but took a bit of time to break the habit.) Let the triple syncro's (in most gears) spool up the gear cluster! When downshifting can't even move the shifter to far even when in neutral into a lower gate. The Hall senors anticipate where you're going and can over-rev.

    Also when ~45 F and below it's a bit harder to go from 1st to 2nd when the trans fluid is cold. Some folks skip 2nd and go to 3rd until it warms up, I usually just pull back harder. No grinding and fortunately in Eastern SC don't have that occur often.
    Last edited by Jerry U; 06-13-2017 at 06:56 AM.
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