'07 GT500 hard to shift 4th to 5th

Discussion in '2007+ Mustang GT500 Tech' started by kazman59, Jan 22, 2023 at 6:50 AM.

  1. kazman59

    kazman59 King of Kazmania

    MGW gen2, Blowfish bracket, Mobile 1 fluid. Installed for almost 2 years, just last month or so been getting progressively harder to shift from 4th to 5th, today it was so hard I just started going 4th to 6th with no problem. Car's driven almost every weekend, all other shifts are fine. ~60k mi.

  2. DieHarder

    DieHarder Senior Member

    crjackson likes this.
  3. Midlife Crises

    Midlife Crises Senior Member

    When you say “hard too get into 5th” do you mean it pushes normally out of 4th and 5th is blocked. Takes a lot of pressure to go in? Grinding?
  4. kazman59

    kazman59 King of Kazmania

    Comes out of 4th easy, I have to deliberately push up, over and up with considerable force. Almost like its locked out. I noticed at low speeds (25-35) it's much easier. Of course, at low speeds I'm not going to use 5th just testing.
  5. Midlife Crises

    Midlife Crises Senior Member

    That really sounds like a synchro.
  6. kazman59

    kazman59 King of Kazmania

    Yeah, that's what I didn't really want to hear. I was hoping for some shifter adjustment advice or such.
  7. stkjock

    stkjock ---- Madmin ---- Staff Member Administrator Super Moderator S197 Team Member

    Have you ever tried to rev match shift it to 5th? if you cannot do that, I'd agree it's a syncro issue
    crjackson and Pentalab like this.
  8. Cum Grano Salis

    Cum Grano Salis Member

    All bets are on, just seem to favor the shifter is out of alignment. Working or not is a very fine line there (or used to be). If all other shifts are OK, must be releasing clutch sat. if only trouble in 4th to 5th? That would be the furthest push up and far right, I’d just take a look, absolutely nothing to lose before dropping tranny. Can picture that right fork (bolts loosened) as gotten a bit wobbly if looks similar?

    Too as I can recall the Ford OEM version (BOSS and MT-82 anyways) shifter would have rubber bushings that could flex eventually and Blowfish bracket was answer to that? F30AEBAD-1FF0-4E2C-9C59-A6F904A0795B.png
    Last edited: Jan 25, 2023 at 6:47 AM
  9. Juice

    Juice forum member

    Assuming its not a shifter issue:

    First sign of clutch going out. If syncros were shot, you would get a grind and not a lockout. And it will be a grind if my suspicion is correct and you keep forcing it into gear.

    How is it going into reverse?

    As the clutch wears, pedal force starts to increas. Because of this, the clutch does not fully release. If the rpms do not match, the syncro blocks the shift. This drastically accelarates syncro wear.
    Last edited: Jan 25, 2023 at 10:24 AM
  10. Midlife Crises

    Midlife Crises Senior Member

    This is absolutely true.
    Macman45 likes this.
  11. Macman45

    Macman45 Resident Geriatric

    This. Do the 6th gear parking brake test where you try and let the clutch out to watch it die. With those miles and age I bet its clutch time
  12. kazman59

    kazman59 King of Kazmania

    I believe the clutch has been changed out. I've driven a stock clutched 08 GT500 (Lee's) and my clutch is considerably more stiff. And Lee has driven mine and remarked how more effort was required than from his.

    One of these days I'll get it up on the stands and check the shifter, until then it'll be 4th to 6th.
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