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Thread: NC tranny problem

  1. #1

    Default NC tranny problem

    So, on the way home tonight, I felt something odd as I shifted into 6th, then the shifter felt soft,without the nice positive engagement I'm used to. Tried to downshift, and couldn't shift below what I thought was 5th; all other gates are locked-out. Eventually realized I was in 6th gear no matter what position the shifter is in.

    No reverse, can't get it into any other gear, still in 6th even when in "neutral." Clutch seems to engage and disengage normally.

    Any ideas, besides a new tranny?
    Polished Turd Racing

    Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."

  2. #2

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    Pray for a bent shift fork?
    [SIGPIC][/SIGPIC]

  3. #3
    Orange cones fear me. cone-cerned's Avatar
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    I'm with sxk122 on this one. Sounds just like what happened when the 3-4 shifter fork broke in my S/R, only my transmission was stuck in 4th.
    On the track, I am fearless.
    If you were as slow as me, you wouldn't be afraid either.

    1994 M Edition
    CSP 67

  4. #4

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    lol.... my diagnosis came from experience with zx2 issues too.....
    [SIGPIC][/SIGPIC]

  5. #5

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    I would blame the previous owner.

  6. #6

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    Could be the shifter bolts were loose and the shifter popped out of the shifting fork linkage. Happened to me once on an older car.
    05 MX-5 Mazdaspeed #1024 Titanium Gray Mica

  7. #7

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    Dang.....

    Did some surfing and found this - http://forum.miata.net/vb/showthread.php?t=237737 Hope it helps!

  8. #8

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    Sorry to hear about this, maybe check with MER about a fix/replacement. They do have lots of these transmissions around the shop.

  9. #9
    Obnoxious at any speed altiain's Avatar
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    Sorry to hear about this Mike. Late model Mazdas seem to be prone to garbage transmissions.
    Iain

    "We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw

  10. #10
    Driver Nails's Avatar
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    Garbage transmission? Serious? How many autocrosses and track days on it?

    Hope it's an easy fix for you but if you have to replace I recommend the 5 over the 6 speed.

  11. #11
    Obnoxious at any speed altiain's Avatar
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    Nails, I sold my NB @ 110k miles on the original transmission. At 72k miles, my RX8 is on its 3rd transmission. Similar levels of abuse (honestly the Miata probably saw more abuse, since it was always on R compounds track or autox).

    And yes, I believe that the transmissions in the '04-'08 RX8 and the NC are garbage for the most part.
    Iain

    "We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw

  12. #12

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    The NC 6-speed is different from the Aisin 6-speed found in the MSM and the RX8, and is actually very good once a couple of weak points are addressed (according to MER). The NC 5-speed is the same one found in the 99-05 NB's, I'm told.

    I'm most likely dealing with either a broken 5/6 shift fork or a condition where the 3/4 carrier and the shift paddle get crossways when going to 5th, and the tranny has to be "reset" to get it back in-sync. Either way, I'm headed to MER today to get it fixed-up.

    As a result, please not the significant price reduction on a lovely set of Konig Feathers in the classifieds... :)
    Polished Turd Racing

    Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."

  13. #13
    Driver Nails's Avatar
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    I like the gearing better on the 5 than 6 especially at Hallett. That's why I prefer it, not because of durability. As for your first Miata, Iain, it spoiled you with outstanding durability. I do think you've had bad luck with the RX-8 trannies though.

  14. #14

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    Quote Originally Posted by Nails View Post
    As for your first Miata, Iain, it spoiled you with outstanding durability.
    You mean the one that was on it's third engine by the time he sold it?

  15. #15

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    Good luck Mike, sorry to hear about the trans problem.
    Thomas
    V-to-the-Dub

  16. #16

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    I know where you live, moto... Damn mexican!
    Polished Turd Racing

    Mick wrote: "I think Jerrett is the best autocrosser I have ever seen naked."

  17. #17

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    Quote Originally Posted by OZMDD View Post
    I know where you live, moto... Damn mexican!
    He is not a Sombrero!


  18. #18
    Obnoxious at any speed altiain's Avatar
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    Quote Originally Posted by OZMDD View Post
    I know where you live, moto... Damn mexican!
    Quote Originally Posted by POS Racing View Post
    He is not a Sombrero!

    That's right! He's a rug!
    Iain

    "We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw

  19. #19
    Obnoxious at any speed altiain's Avatar
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    Quote Originally Posted by Titus View Post
    You mean the one that was on it's third engine by the time he sold it?
    Lol... first motor was the infamous thrust bearing issue at 11k miles, long before I bought it from the original owner. I had John Day rebuild the motor at 105k because of high RPM noise - he said it probably would have gone another 50k miles without issue.
    Iain

    "We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw

  20. #20
    Obnoxious at any speed altiain's Avatar
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    Quote Originally Posted by Nails View Post
    I do think you've had bad luck with the RX-8 trannies though.
    Heh. Saini was shocked that I'd gotten as many miles as I did out of the old box, based on usage. They were replacing them every 3-4 races in their Touring 3 RX8s.
    Iain

    "We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw

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