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Trouble going into gear at high RPMs

Discussion in 'Driveline' started by ssblubyyou, Mar 25, 2019.

  1. ssblubyyou

    ssblubyyou Member Established Member

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    I just got my car back from tuner after I changed pulleys. Made 744 on e85 vs 660 on previous tune. I took it out for a couple of pulls and it has a hard time going to the next gear. It’s like it hits a block and won’t go. Sometimes it’s 2nd, sometimes 3rd or 4th. No rhyme or reason.
    Last year it was fine at the drag strip running 28x10.50 15 MT et drags, steeda Tri-ax shifter, Spec 3 clutch, firewall adjuster, and clutch quadrant, with stock cable. I could shift and never lift... never missed a gear. Now it’s like something changed over the winter. Shifts excellent if I’m not beating on it a little. Does this sound like a firewall/cable adjustment? Clutch pedal is stiff but feels good like it always has. Seems to engage/ disengage mid travel like always. Hoping to figure this out as track season is almost here. Thanks
     
  2. P49Y-CY

    P49Y-CY selfie deaths ftw Established Member

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    yes.
     
  3. ssblubyyou

    ssblubyyou Member Established Member

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    Good deal. I will give it a couple turns counterclockwise and see what happens. Or is that too big of an adjustment? Thanks
     
  4. 04torchred

    04torchred Well-Known Member Established Member

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    How much use has the clutch seen? I had a similar issue with the spec 3+ near the end of its life, just seemed like it wouldn't shift. Is it better if you shift hard right at or below 6k as best you can? I found if I went above 6k it was worse.
     
  5. BLOWN9646

    BLOWN9646 E85 COBRA Established Member

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    Exact problem I'm having now...time for new clutch
     
  6. ssblubyyou

    ssblubyyou Member Established Member

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    I really didn’t pay attention to the tach to be honest. I was just banging through the gears. Truthfully it may have been a little over 6000. I bought the clutch with it in in. Car only has 42k on it so I doubt it’s that old. I’d say under 6000 miles. It has maybe 30 passes on it at the track with 28x10.50 15 et drags leaving off 2 step at 4500-5500. It’s just weird it was fine last year, pull it out of storage, send it off for more boost and a tune, now it sucks shifting at high rpm. Although I went from 660 to 744 hp... maybe it’s at it’s end. I have a McLeod rxt sitting in the garage I could put in but really didn’t want to do that yet. I gave the firewall adjuster a couple turns out. Weather is going to be nice tomorrow so I will take it out for a test session.
     
  7. V6&V8SHO

    V6&V8SHO Well-Known Member Established Member

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    Describe the T56. Stock, stock with 26 spline, full rebuild with 26 spline, ect?
     
  8. ssblubyyou

    ssblubyyou Member Established Member

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    Stock T56 with 26 spline.
     
  9. Shadow Grey 03

    Shadow Grey 03 Well-Known Member Established Member

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    The tranny internals are also wearing with time. The magnum shifts much easier with higher power and higher revving set ups. The t56 without upgraded bits and pieces doesnt really like to be shifted that hard for too long. Been there and it sounds like you are there now.
    The rxt is an excellent choice as well.
     
    V6&V8SHO likes this.
  10. First-on-race-day

    First-on-race-day Member Established Member

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