Proper Torque for auto trans crossmember to frame Bollts 03 Tahoe 4x4 5.3

Discussion in 'GM Powertrain' started by BillM, Apr 18, 2011.

  1. BillM

    BillM Rockstar 100 Posts

    I cannot seem to find the proper torque for the 14 mm bolts on the Auto Transmission Crossmember. The 4 bolts that bolt the crossmember to the frame.
    It is for a 2003 Tahoe Z71 4x4 with the 5.3. I have set it 80 Ft/Lbs right now, but I hope that I can get the correct torque before I take it off the jack stands.
    This is where the transmission mount bolts to the transmission and then to the Crossmember in question.
    Also, is it true that the trans mount bolts are only torqued to 18 Ft/Lbs??

    Thanks
     
  2. IPFK83

    IPFK83 Rockstar 3 Years 100 Posts

    Im not sure but when I put mine back on I put the impact on them and called it a day haven't had any problems with it in a year. Not too sure about the trans bolts either don't have a service manual to look at.
     
  3. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Yes the trans bolts are only 18ft lbs. because of the aluminum housing. Just put some blue lock-tite on the threads.
     
  4. clgoch187

    clgoch187 Rockstar 4 Years 500 Posts

    i use german spec......goodentight
     
  5. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Be careful,may be goodenstripped.LOL.
     
  6. stephan

    stephan Rockstar 4 Years 5000 Posts

    :rofl: Too funny, and SO TRUE !!
     
  7. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    Is the head of the bolt 14mm, or the diameter of the threaded section?

    If the head is 14mm, 80ft/lbs is more than tight enough.
     
    Last edited: Apr 19, 2011
  8. BillM

    BillM Rockstar 100 Posts

    Thanks Everyone!!
    I especially liked the German Spec and the reply. LOL!
    BTW, Bolts are measured at the shoulder or threaded portion, not the head.
     

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