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02 Denali 4l60

Discussion in 'All Other Transmissions' started by tanman_2006, Feb 4, 2018.

  1. tanman_2006

    tanman_2006 Just a farm kid...

    5,498
    509
    Feb 15, 2010
    Seiling, Oklahoma
    Working on my brother in laws Denali. It has a 6" lift and 35" mud tires. Driving in the mountains on a ski trip he heard a loud pop and the engine free revs in drive and reverse.

    So we pulled the trans and tcase assuming a broken input shaft. Now we cant get the torque converter to pull off the input.

    Any advice?
     
  2. 3500GMC

    3500GMC What T F, over

    5,463
    590
    Jun 7, 2009
    Nashport, Ohio
    Wow.. Uhmm, a couple long pry bars and some choice words would be a start. Sounds like not much could be hurt at this point.
     
  3. Will L.

    Will L. Well-Known Member

    7,406
    6,008
    Jan 25, 2013
    Boulder City Nv
    Piece of thick angle iron across bell housing face with 2 holes in it that line up with flywheel mount holes. 2 pieces of threaded rod(aka all thread) through hole and into tc nut. Then on outside of angle iron couple of washers (2 or 3) with grease on them then a nut. Thrust bearings are better if you have a couple. Grease the threads also where it will go through the nut. Take turn tightening the nuts so it works as a big puller. Once you have some decent tension use plastic dead blow hammer and smack the tc.
     
    tanman_2006 likes this.
  4. tanman_2006

    tanman_2006 Just a farm kid...

    5,498
    509
    Feb 15, 2010
    Seiling, Oklahoma
    Aka make a steering wheel puller and see what gives
     
    Will L. likes this.
  5. Will L.

    Will L. Well-Known Member

    7,406
    6,008
    Jan 25, 2013
    Boulder City Nv
    Haha, yes! BIG steering wheel puller.
     
  6. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,978
    2,306
    May 9, 2008
    ZEPHYRHILLS FL
    Quick question, does the converter move in or out at all? Sounds to me like he spun the shaft going into the drum, and/or welded it to the converter. You can try some prybars, 1 under each side as you don't have much to lose right now. You may also want to try standing it up and rotating the converter while lifting it straight up. I believe with how the 300mm converters input shaft is built, if the input shaft spun from the drum, the shaft can slide forward, go past the splines, and lock up inside the converter.
     
  7. tanman_2006

    tanman_2006 Just a farm kid...

    5,498
    509
    Feb 15, 2010
    Seiling, Oklahoma
    Any way to get that out ferm?
     
  8. Ed HD

    Ed HD Formerly: Dad's 05 LLY

    3,152
    342
    Jul 6, 2008
    Chuck Town, Iowa
    Trade it in as a core at the parts store. lol
     
  9. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,978
    2,306
    May 9, 2008
    ZEPHYRHILLS FL
    If it did slide padt the splines, then all you can do is spin it while lifting it straight up until until the splines line up again. I've also heard of pumps breaki,g and seizing to the converter snout, thats why I asked if it slides in or out at all to see how locked up it is.
     
  10. 3500GMC

    3500GMC What T F, over

    5,463
    590
    Jun 7, 2009
    Nashport, Ohio
    Would venture a guess its a pump explosion. It ramped up pressure when the ecm detected a slip, most likely the TCC apply valve bore wear problem in the aluminum valve body on these 4L60's.

    My 2000 Camaro did this (minus the outright failure) there about 10 years ago and IIRC was accompanied by the p1870 code and I/O slippage codes. NECK SNAPPING shifts,lol.
     
  11. tanman_2006

    tanman_2006 Just a farm kid...

    5,498
    509
    Feb 15, 2010
    Seiling, Oklahoma
    We found a low mile escalade trans. The Kon is getting it's gears swapped now.
     
    3500GMC and Will L. like this.

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