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Thread: C5 6sp Transmission woes....................

  1. #1
    Member gmjunkie's Avatar
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    Default C5 6sp Transmission woes....................

    Transmission Go Boom!~!!

    Cruising to my sisters Christmas day rolling about 65 in 5th with the cruse engaged on US 63 in NE Missouri,started up a slight grade and BANG!~!!
    No more 5th and 6th,It was so loud that I was looking in the rear view for parts hitting the pavement!

    NOT GOOD.............I think the Bull Gear Jumped the Heifer Gear!~!!

    Nothing that a new output shaft,5-6 driven gear,5-6 drive gears,5-6 synchronizer,reverse gear,rev synchronizer, a few bearings and c clips wont fix!~!!
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    Last edited by gmjunkie; 01-14-12 at 10:09 PM.
    junk!!
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  2. #2
    Member LT4man's Avatar
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    Sorry to hear about your transmission woes.

    Any idea why this happened?

    After repairing your six-speed, please be sure to SAVE the WAVE!
    An attendee at all the CruiseFests including the one which never happened.


    Autosig (Shadow) A

  3. #3
    Moderator Toms01's Avatar
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    Oh Junkie, that hurts just looking at the pictures. What caused it? Any idea? Do you know a good mechanic who can fix it? (Yea I know, Smart-arse)
    Formerly known as Toms94

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    / Custom Light Oak/Mag Red interior by Mid America Motorworks

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  4. #4
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    GREAT Christmas present..........a rebuilt 6 speed!
    Sounds like a winner to me, son

    "Dad"
    tpivette89 likes this.
    Andy Anderson - PROUD VIETNAM VETERAN.

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  5. #5
    Member gmjunkie's Avatar
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    Quote Originally Posted by LT4man View Post

    Any idea why this happened?
    Quote Originally Posted by Toms01 View Post
    What caused it? Any idea?
    Yeah,Look at the first photo at the top of the splines,The C clip at that location was not seated properly and wore out the groove in the shaft then letting the 5-6 driven gear to slide for and aft on the shaft during acceleration and deceleration wearing out the splines on the shaft and in the gear!
    Last edited by gmjunkie; 01-16-12 at 12:39 PM.
    junk!!
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  6. #6
    Member LT4man's Avatar
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    Amazing how such a small piece which is not exactly in the correct position can cause major catastrophic failure many years and miles down the road!

    Good luck with your repair!

    After repairing your Tremec transmission, please be sure to SAVE the WAVE!
    An attendee at all the CruiseFests including the one which never happened.


    Autosig (Shadow) A

  7. #7
    Member gmjunkie's Avatar
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    Quote Originally Posted by Toms01 View Post
    Do you know a good mechanic who can fix it? (Yea I know, Smart-arse)
    Yeah,I got 4 of the Area Vocational Technical Center's top students and 1 belligerent old bastard working on it!~!!

    I've taken lots of photos,I'm working on it at the Vo-Tech School I graduated from in 1972!~!

    The Auto Technologies Instructor and I graduated in the first class the school ever produced after being built,and are Old Gear Head Buddy's from go kart racing days before that!~!!

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    Last edited by gmjunkie; 01-16-12 at 04:43 PM.
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    junk!!
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  8. #8
    Member LT4man's Avatar
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    That first picture reminds me of Chicago street crews!

    I do not want to tell you what the second picture reminds me of!
    An attendee at all the CruiseFests including the one which never happened.


    Autosig (Shadow) A

  9. #9
    Member gmjunkie's Avatar
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    Quote Originally Posted by LT4man View Post
    That first picture reminds me of Chicago street crews!

    I do not want to tell you what the second picture reminds me of!
    Two of the guys were back in the back taking the mufflers off,But the camera man farted!~!!
    junk!!
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    www.gmjunkie.com
    Founding Member: 10 Corvettes Anonymous


  10. #10
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    Quote Originally Posted by LT4man View Post
    That first picture reminds me of Chicago street crews!

    I do not want to tell you what the second picture reminds me of!
    A Chicago "street walker" ??????
    Andy
    Andy Anderson - PROUD VIETNAM VETERAN.

    Vietnam Veterans Corvette Club - Founding Member #1

    "Dream as if you'll live forever...........Live as though you'll die today" - James Dean

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  11. #11
    Moderator Toms01's Avatar
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    Glad to see you got someone who knows what's going on.
    Formerly known as Toms94

    2001 Magnetic Red
    / Custom Light Oak/Mag Red interior by Mid America Motorworks

    2005 CruiseFest Attendee (Bowling Green, KY)
    2007 CruiseFest Attendee (Colorado Springs, CO)
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  12. #12
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    Default Junk - Glad ta see your having fun back @ school...




  13. #13
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    Just seen this. Was wondering what yuo ended up finding. I also graduated from vocational auto shop in 72.

    Mark
    markw8

  14. #14
    Member gmjunkie's Avatar
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    Quote Originally Posted by Mark Watkins View Post
    Just seen this. Was wondering what yuo ended up finding. I also graduated from vocational auto shop in 72.

    Mark
    Killed..........

    Main Shaft
    5-6 Driven Gear
    5th Speed Gear
    5th Speed Gear Bearing
    5th Gear Friction Cone
    5th Gear Blocking Ring
    6th Speed Gear
    6th speed Gear Bearing
    6th Gear Friction Cone
    6th Gear Blocking Ring
    5-6 Synchronizer Hub Assembly
    Reverse Gear
    Reverse Gear Bearing
    Reverse Gear Synchronizer Assembly
    Reverse Gear Blocking Ring

    And a few Miscellaneous Retainers,Bearings and Seals,I also went ahead replaced the bearings and bushings in the torque tube and up graded the clutch to a LS7 clutch!


    After the parts bill,My Wazoo is extremely sore!~!!
    Last edited by gmjunkie; 01-22-12 at 07:26 PM.
    junk!!
    "WARNING"
    The views and opinions of this forum user might not be suitable for others, this user may appear to be heavily over-medicated, under medicated, intoxicated, listening to the voices in his head or just plain being an ass, so some viewers may be offended!~!!!
    www.gmjunkie.com
    Founding Member: 10 Corvettes Anonymous


  15. #15
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    Quote Originally Posted by gmjunkie View Post
    Killed..........

    Main Shaft
    5-6 Driven Gear
    5th Speed Gear
    5th Speed Gear Bearing
    5th Gear Friction Cone
    5th Gear Blocking Ring
    6th Speed Gear
    6th speed Gear Bearing
    6th Gear Friction Cone
    6th Gear Blocking Ring
    5-6 Synchronizer Hub Assembly
    Reverse Gear
    Reverse Gear Bearing
    Reverse Gear Synchronizer Assembly
    Reverse Gear Blocking Ring



    And a few Miscellaneous Retainers,Bearings and Seals,I also went ahead replaced the bearings and bushings in the torque tube and up graded the clutch to a LS7 clutch!




    After the parts bill,My Wazoo is extremely sore!~!!
    At least the labor was cheap.

    Mark
    markw8

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