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Thread: Torque convertor bolts

  1. #1
    Join Date
    Dec 2001
    Location
    Nampa,Id USA
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    197

    Post

    I read where several members have checked the tightness/replaced the bolts that hold the torque convertor to the flex plate.How did you tackle this job, was a lift rack used? How much time did the job take? I looked at it & seems very difficult laying under the truck.
    Any & all help appreciated.

    mrgene@att.net
    chipper 2001 GMC,,D/MAX,SLE,EXT CAB,LONGBED,LINEX,FIRESTONE AIR BAGS,,driv\'en it & smilling, 32' Excel 5er

  2. #2
    Join Date
    Feb 2003
    Location
    Holland, MI
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    access to the bolts is through the starter hole, starter has to be removed to do this. could be a bit awkward on the ground
    2003 GMC Sierra 2500 HD CC Shorty
    Dyno Proven - 800 rwhp on fuel only.
    Trans to hold it and a big ol S400 turbo feeding it.

  3. #3
    Join Date
    May 2003
    Location
    Ridgeway, Ontario, Canada
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    45

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    Ummmm, should this keep me awake tonight?

    This is a new one to me, is it a silent killer like high blood pressure? Any symptoms to watch for? Clearly, loose bolts would be a bad thing.....
    2002 Chev 2500HD, D-Max/Alli, X-Cab Short Box, LT, Black/Graphite, Hot Juice from JK, Back Country steps, Michelin LTX. Not sure if its a mid-life crisis or second childhood but it sure is fun.

  4. #4
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    Feb 2003
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    Holland, MI
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    willow, there have been a few issues with these bolts coming loose, you will notice a ticking sound from bell housing area. usually only one makes it all the way out, extreme cases it wollers out the holes in the flexplate. I would stick with the 'ol adage here, if it aint broke.......
    Unless your in for an afternoon under the truck that is, while your there, might as well put new bolts in.
    2003 GMC Sierra 2500 HD CC Shorty
    Dyno Proven - 800 rwhp on fuel only.
    Trans to hold it and a big ol S400 turbo feeding it.

  5. #5
    Join Date
    Dec 2001
    Location
    Nampa,Id USA
    Posts
    197

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    DmaxalliTech,
    Do you know approximately how much shop time this would be at the dealer?
    chipper 2001 GMC,,D/MAX,SLE,EXT CAB,LONGBED,LINEX,FIRESTONE AIR BAGS,,driv\'en it & smilling, 32' Excel 5er

  6. #6
    Join Date
    May 2003
    Location
    Ridgeway, Ontario, Canada
    Posts
    45

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    Thanks, I was being a bit factious there. It
    2002 Chev 2500HD, D-Max/Alli, X-Cab Short Box, LT, Black/Graphite, Hot Juice from JK, Back Country steps, Michelin LTX. Not sure if its a mid-life crisis or second childhood but it sure is fun.

  7. #7
    Join Date
    Feb 2003
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    Holland, MI
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    697

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    Chipper, I would have to guess it to be in the 1.5 hour range. I will check the books tomarrow and post published time.

    Thats a good q' willow. I will have to dig into that and follow up. The bolts have gone through two part no changes and are now on the third, I think they are aware of the problem or they would not change the bolts. If they are ever removed, they MUST be replaced.
    2003 GMC Sierra 2500 HD CC Shorty
    Dyno Proven - 800 rwhp on fuel only.
    Trans to hold it and a big ol S400 turbo feeding it.

  8. #8
    Join Date
    Jul 2001
    Location
    Tremonton, Utah, USA
    Posts
    504

    Wink

    Sounds like they must have nyloc inserts in the threads. Maybe the first ones didn't. I haven't heard of this problem since the first 01 came out. As I remember, they came loose from the factory. Later! Lone Eagle
    02 2500 HD EC SB<br />Juice 4.61<br />Post OEM Racor 660<br />Back Country Bars<br />Roll Lock Cover<br />B & W Turnover

  9. #9
    Join Date
    Dec 2001
    Location
    Nampa,Id USA
    Posts
    197

    Talking

    DmaxalliTech,
    you were going to check the "books" & let me know the time to change the T.C. bolts??
    chipper 2001 GMC,,D/MAX,SLE,EXT CAB,LONGBED,LINEX,FIRESTONE AIR BAGS,,driv\'en it & smilling, 32' Excel 5er

  10. #10
    Join Date
    May 2002
    Location
    Winnipeg, Manitoba
    Posts
    28

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    I guess great minds think alike..... I was just at my Allison dealer an hour ago picking up a filter and this very subject came up. The service manager said it took his guy's about 2 hours to do the job. I'm going to do it my self over the week-end. Kieth was very good about giving a few photocopies from the service manual so I have a better idea of what I'm up against also gave me the replacement bolts that Allison had put out for this TSB. There is allready some sort of thread locker on the bolts in the bag. I understand that the bolts from factory are T-50 Torx, so I'll have to go out and grab one of thse puppies.
    Just a word of caution about working though the starter hole.... you would'nt want to drop a socket or one of the bolts inside the bellhousing.... that would make for a looong night..

    ----&gt;Kevin
    \'02 D/A Ext/SB K&N, SmittyBars,Sylvania Xenarc 2020&1010\'s Line-X, Bfgoodrich Boots, TTT lighted mirrors, Custom in box Fuel tank/tool box, Fumoto valve, Juiced, X-Monitor

  11. #11
    Join Date
    Feb 2003
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    Holland, MI
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    Chipper, sorry I took so long. Actual labor time would be dependent on the dealer but I would not pay more then two labor hours. If you were at my dealer, Your paperwork would say "ticking noise from back of engine area" and you would be getting six new bolts!.
    2003 GMC Sierra 2500 HD CC Shorty
    Dyno Proven - 800 rwhp on fuel only.
    Trans to hold it and a big ol S400 turbo feeding it.

  12. #12

    Unhappy

    DmaxalliTech

    The ticking sound that you describe with the loose TC bolts does it sound like an exaust pipe thats warming up and you here that tinny metal expanding sound. If it is I think mines loose too and I barely have 1,200 miles. Hmmmm I guess I'll have to investigate a little more this weekend.

    Later Diesel Dragon
    03 Chevy Silverado 3500LT 4WD Ext Cab Dura/Alli Grey Metallic. ATS Dual Exaust VA Box, Electric Bed Cover with Tool Box. Spa Boost/EGT, Rancho 9000X shocks, <a href=\"http://www.msnusers.com/dieseldragonspics\" target=\"_blank\">www.msnusers.com/dieseldragonspics</a>

  13. #13
    Join Date
    Dec 2001
    Location
    Nampa,Id USA
    Posts
    197

    Talking

    Dmaxalli,
    Thanks for the help, much appreciated. [img]smile.gif[/img]
    chipper 2001 GMC,,D/MAX,SLE,EXT CAB,LONGBED,LINEX,FIRESTONE AIR BAGS,,driv\'en it & smilling, 32' Excel 5er

  14. #14
    Join Date
    Feb 2003
    Location
    Holland, MI
    Posts
    697

    Post

    Dragon, please dont get paranoid over this! Typically the sound you will hear will change in gear and is very noticable. You might be expieriencing the famous 'tick' which is normal.

    If you do drop a bolt or socket, you might be able to retrieve it through the tin covers on the bottom side of the bell housing. I just keep a small pocket magnet handy and havent had any problems.
    2003 GMC Sierra 2500 HD CC Shorty
    Dyno Proven - 800 rwhp on fuel only.
    Trans to hold it and a big ol S400 turbo feeding it.

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