Clunk right before engaging 1st gear on MT-82. Is it normal?

Discussion in 'Mustang S550 General Forums' started by Elp_jc, Jun 1, 2020.

  1. Elp_jc

    Elp_jc Well-Known Member

    First Name:
    JC
    Vehicle(s):
    2019 Bullitt K7979, MR, Nav, B&O, Cover
    Joined:
    May 2, 2020
    Location:
    El Paso, TX
    Posts:
    913
    Likes Received:
    148
    0   0   0
    Hey gang, noticed that on my new Bullitt since I test drove it for the first time. It already had 66 miles on the clock, and probably not easy miles. Even with the clutch fully depressed, I can hear and feel the clunk right when I'm pushing the shift lever to the left, right before going into 1st gear. Doesn't sound like a problem, but just curious if other manual GTs make it as well, and what it is. Never had that issue on any of my multiple past manual cars before. By the way, thought it could be the 'hill assist', but this happens even fully level. Thank you.
     
  2. Shifting_Gears

    Shifting_Gears Well-Known Member

    Vehicle(s):
    2016 Mustang GT
    Joined:
    Sep 13, 2018
    Location:
    South Florida
    Posts:
    1,373
    Likes Received:
    1,058
    Occupation:
    Business Management
    0   0   0
    Yes, it’s normal. It should sound like a very dull thud. The internals of the trans spin at different speeds, so when you engage a gear there’s the physical meshing of the gear engagement, the throwout bearing, clutch and flywheel all engaging or disengaging.
     
  3. Zrussian13

    Zrussian13 Well-Known Member

    First Name:
    Chris
    Vehicle(s):
    2019 Mustang GT, 2018 Acura MDX
    Joined:
    Nov 16, 2018
    Location:
    Phoenix
    Posts:
    386
    Likes Received:
    198
    0   0   0
    Yup. Freaked me out early on and I thought something was wrong. 32k hard miles later its still there but I don't even notice it now.
     
  4. abmobil

    abmobil Well-Known Member

    Vehicle(s):
    DD 13 Nissan Titan Wknd ride 17 Mustang GT
    Joined:
    Nov 19, 2016
    Location:
    United States
    Posts:
    122
    Likes Received:
    17
    0   0   0
    Yes normal. If you push the clutch in a wait just a bit longer before engaging 1st it won’t do it. My 17 has done it since new. Never a problem and car runs great.
     
  5. geep81

    geep81 Well-Known Member

    First Name:
    Glenn
    Vehicle(s):
    2020 GT Premium
    Joined:
    Sep 29, 2018
    Location:
    Cleveland OH
    Posts:
    305
    Likes Received:
    156
    0   0   0
    My '19 GT and my '20 GT both did/do it, doesn't worry me a bit.
     
  6. Tacswa

    Tacswa Well-Known Member

    Vehicle(s):
    2019 Bullitt - Shadow Black
    Joined:
    Apr 1, 2020
    Location:
    Maryland
    Posts:
    70
    Likes Received:
    31
    0   0   0
    My Bullitt does it. If I remember to shift into 2nd before going into 1st (ie; at a stop light) it doesn't do it. Shifting into 2nd stops the flywheel movement, etc so it won't "thud" going into 1st.
     
  7. Armageddon Turbo

    Armageddon Turbo Well-Known Member
    Gold Sponsor


    First Name:
    Leroy
    Vehicle(s):
    Twin Turbo 2014 Mustang GT
    Joined:
    Dec 25, 2019
    Location:
    Albuquerque, NM
    Posts:
    496
    Likes Received:
    133
    0   0   0
    Yes normal..noticed it before myself.
     
  8. Zooks527

    Zooks527 Well-Known Member

    Vehicle(s):
    2019 KB GT, 401A, 6MT, PP1, S&S, MR, AE, B&O / 2005 Toyota Tacoma
    Joined:
    Aug 24, 2018
    Location:
    02048
    Posts:
    1,013
    Likes Received:
    602
    0   0   0
    Um, the only thing that stops flywheel movement is stopping the engine.
     
  9. OP
    OP
    Elp_jc

    Elp_jc Well-Known Member

    First Name:
    JC
    Vehicle(s):
    2019 Bullitt K7979, MR, Nav, B&O, Cover
    Joined:
    May 2, 2020
    Location:
    El Paso, TX
    Posts:
    913
    Likes Received:
    148
    0   0   0
    Good to hear gang. But never heard of a dry-clutch tranny doing that. It happens all the time on motorcycles, since they have a (multi-plate) wet clutch, where plates are so close to each other than the viscosity of the oil keeps the tranny rotating, hence the cringe-inducing thud when engaging 1st gear. But makes sense, and maybe it's the new dual-disc clutch (did that happen before that?). At any rate, Ford probably saved a few pennies on rubber isolators, just like on drive shafts on trucks (hence a drive-line clunk when first firing the engine, sometimes), but not a big deal; just wanted to know if it was normal, and it is, so all is well:sunglasses:.

    Finally, in order for the synchros to work effectively every time, the tranny needs to be moving at least a little before engaging a gear, or you might not be able to get it into gear immediately, if the gears happen to be aligned the wrong way. Switching to 2nd seems to be the best solution, since that stops the tranny without a clunk, AND gears are aligned properly :D. Thank you very much for all the reassuring comments :). Be safe.
     
  10. ice445

    ice445 Well-Known Member

    First Name:
    Ryan
    Vehicle(s):
    2020 Mustang GT 6MT
    Joined:
    Apr 13, 2020
    Location:
    Salt Lake City, UT
    Posts:
    466
    Likes Received:
    355
    0   0   0
    Normal, I think it's actually movement of the trans/rear end that's causing it.
     
  11. EPTS550

    EPTS550 Well-Known Member

    First Name:
    Jerry
    Vehicle(s):
    2019 GT
    Joined:
    Nov 8, 2019
    Location:
    El Paso Tx
    Posts:
    62
    Likes Received:
    52
    0   0   0
    Yeah I feel it more in the rear. Torsen here.
     
  12. XS

    XS Active Member

    Vehicle(s):
    2016 GT PP
    Joined:
    May 22, 2017
    Location:
    Rockies
    Posts:
    36
    Likes Received:
    10
    0   0   0
    Blip the throttle in neutral with the clutch out (double clutch) and when the rpms come back down to idle you should be able to slide right into first. Better than starting off in second if you can't get a clean 1st gear engagement at rest.
     
  13. Monopoly

    Monopoly Well-Known Member

    Vehicle(s):
    2017 Mustang GT, 2012 Civic Si
    Joined:
    Jul 29, 2016
    Location:
    Toronto
    Posts:
    787
    Likes Received:
    215
    0   0   0
    Another joy of our noisy MT82. I thought the exact same thing when I first got mine brand new.

    After 13k miles I'm used to it. Other than the noise I really do like the transmission now. Even with all its quirks.
     
  14. OP
    OP
    Elp_jc

    Elp_jc Well-Known Member

    First Name:
    JC
    Vehicle(s):
    2019 Bullitt K7979, MR, Nav, B&O, Cover
    Joined:
    May 2, 2020
    Location:
    El Paso, TX
    Posts:
    913
    Likes Received:
    148
    0   0   0
    Hey, that actually sounds more logical, but could be either one, I guess. What do you think might be making the noise? The tranny is rubber isolated, at least if you're not using some of the braces offered out there to fill the holes (either the outer 2, or all 3) left for that purpose. I don't think it's the Torsen, since it's not moving when the clunk happens, and the shaft doesn't have any torque with the clutch depressed.

    Hey, we're talking about shifting to 2nd then 1st with the clutch depressed; no 2nd gear starting at all :). But if you leave the clutch depressed too long, and can't get into 1st due to gears aligned the wrong way, your solution is the correct approach indeed. I personally never use the clutch except for shifting, so never have engagement issues, since I shift as soon as clutch goes in. I don't think I'll do the 2-1 thing, to be honest. The clunk is subtle enough that doesn't bother me enough to do that, but it's odd that we have it.

    And yes, I'm also liking the tranny better than I thought after reading so many negative comments. Not going to touch it. Just hope the slight notchiness it has now (especially the 1-2 and 2-3) goes away after breaking in (does it?). But even as it is, it's not bad at all; I really like the mechanical feel to it, so don't plan to change anything. It's obviously notchier when cold, but that's normal. I don't think changing fluids would be a good idea, since it's reportedly fully synthetic already, so maybe just check that level is correct one of these days.
     
    XS likes this.
Loading...

Share This Page