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Has anyone ever done a cab swap on a 379

Discussion in 'Peterbilt Forum' started by CrAnKyBoY, May 5, 2019.

Page 1 of 2
  1. May 5, 2019 #1
    CrAnKyBoY

    CrAnKyBoY Bobtail Member

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    i have a 1991 379 day cab with a pretty corroded cab.... I bought a 1998 cab in very good shape but is from a written off truck.

    I’m trying to figure out how to handle this whole situation... anyone have any experience?
     
    CrAnKyBoY, May 5, 2019
    CrAnKyBoY, May 5, 2019
    #1
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  3. May 5, 2019 #2
    boneebone

    boneebone Road Train Member

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    Is it a straight swap,cab mount to cab mount, or is there fabrication involved?
     
    boneebone, May 5, 2019
    boneebone, May 5, 2019
    #2
  4. May 5, 2019 #3
    CrAnKyBoY

    CrAnKyBoY Bobtail Member

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    Well far as I know... removing the old cab in putting the new one in place is the simple part.
    I’m concerned with wiring and vin numbers ect .
     
    CrAnKyBoY, May 5, 2019
    CrAnKyBoY, May 5, 2019
    #3
    Trucker61016 Thanks this.
  5. May 5, 2019 #4
    wore out

    wore out Numbered Classic

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    From 91 to 98 your gonna have air ride cab issues to deal with. Not a big deal but if you keep it air ride radiator supports etc need to be moved to the radiator. The rest is just as straightforward. Nothing to laying the dash and wiring harness out.
     
    wore out, May 5, 2019
    wore out, May 5, 2019
    #4
    Oxbow, Bean Jr. and Humblepie Thank this.
  7. May 5, 2019 #5
    CrAnKyBoY

    CrAnKyBoY Bobtail Member

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    What the work involved with the air ride cab ?
     
    CrAnKyBoY, May 5, 2019
    CrAnKyBoY, May 5, 2019
    #5
  8. May 5, 2019 #6
    wore out

    wore out Numbered Classic

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    You have to put radiator supports to the engine instead of firewall so cab will float. Use the 98 mounts etc. Not much to it once you see the two side by side its gets self explanatory
     
    wore out, May 5, 2019
    wore out, May 5, 2019
    #6
    pushbroom, shogun, Bean Jr. and 1 other person Thank this.
  9. May 5, 2019 #7
    Cam Roberts

    Cam Roberts Road Train Member

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    Where else ids there vin numbers besides the bronze plaque that is held in place by 4 pop rivets mounted on the removable dash panel down by left knee area?
     
    Cam Roberts, May 5, 2019
    Cam Roberts, May 5, 2019
    #7
  10. May 5, 2019 #8
    Humblepie

    Humblepie Pontificator

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    Once you’re done the dealer can order you a vin plate for the old truck. Put that on the new cab.
     
    Humblepie, May 5, 2019
    Humblepie, May 5, 2019
    #8
    shogun and Bean Jr. Thank this.
  11. May 5, 2019 #9
    CrAnKyBoY

    CrAnKyBoY Bobtail Member

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    There is one stamped in the back of the cab on the outside. One in glove box I believe. One on door sticker . And another stamped on the frame. On the turbo side .
     
    CrAnKyBoY, May 5, 2019
    CrAnKyBoY, May 5, 2019
    #9
  12. May 5, 2019 #10
    Cam Roberts

    Cam Roberts Road Train Member

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    I have a 379 and am wondering how many vin plates on my truck. They are removebale and held in by pop rivets on the one on my lower dash panel.
    Edit. Someone answered for me. Thanks
     
    Cam Roberts, May 5, 2019
    Cam Roberts, May 5, 2019
    #10
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