FJ40 Frame Boxing Kit!

Discussion in 'Drivetrain - Suspension' started by Dan Fredrickson, Dec 2, 2015.

  1. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    We have been making these for 10 years now, time to stiffen up yours!

    These are Reinforcement Plates to box the rear of your FJ40, they are .1875" (3/16) thick Steel Plate. Made to strengthen an inherently weak area on an FJ40, opinions differ on whether or not Boxing the frame should be done so do your research. We believe the frame should be stiff and the suspension should be doing the flexing. Flexing the frame loosens the rivets and slowly tears it apart. This comes with a 1.75" x .120" replacement crossmember with 4 predrilled placement options, one of the holes is at the stock position and the others are spaced 3" on center, one in front and 2 behind the stock position. If you are adjusting your WB way back we would recomend 2 Crossmembers to retain the structural rigidity gained by the frame boxing itself and the Crossmembers provided are long enough to allow mounting through the existing frame also (just drill 1.75" holes through the frame using the Plates as a guide). These are designed to fit within the frame itself so you do not have to remove the tub to install, however you do have to remove the factory Crossmember and mounting plate and reposition the rear brake line. The short angled plates are made 1/8" long to allow for movement that has already occured. Welding Required!

    [​IMG]

    FJ40 Frame Boxing Kit
     
    lwb86, Mace, Stumpalama and 1 other person like this.
  2. Varty Yo

    Varty Yo SILVER Star

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    someone make one for a 45 frame!!!!
     
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  3. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    I have 2 - 45's but I only have 1 frame and it is an LV...
     
  4. gmayer

    gmayer

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    Will this fit an lv frame?
     
  5. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    It will not, the LV flares out as it goes farther back from the wheelwells.
     
  6. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    Time to tighten it all up!
     
  7. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    Ya know, the FJ 40 and 45 are just the best vehicles ever made.
     
    Last edited: Apr 19, 2016
    stevebradford and Mace like this.
  8. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    C-channel frames are fine to start with, but fully boxed will take you all the way!
     
  9. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    If you plan to ride your FJ hard and put it away wet, then think of these boxing plates as preventative maintenance. ;)
     
  10. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    Totally with the effort, and minimal investment if you want your FJ to last you a lifetime.
     
  11. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    For the FJ40 MEN!
     
  12. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    The way to do it!
     
  13. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    You know it's something you should get done...
     
  14. SuperBuickGuy

    SuperBuickGuy

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    Funny, when I boxed mine during my build, Pirate folks told me I was an idiot and that the frame needed to flex.... in addition to those plates, I highly recommend welding the seam where Toyota boxed it. Rivets break and wear into oblong holes.

    Of course, the proof is this. I don't have rattles. I don't have chipped or bent panels from hard use. I hope you sell thousands - it's a very worthwhile update.
     
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  15. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    We have sold hundreds over the past 10 years but I think thousands may be asking too much ;)
     
  16. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    This is what you need to take your 40 to the next level!
     
    Last edited: Sep 10, 2016
  17. LAZ

    LAZ

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    Adding this to my wish list
     
  18. muddogbob

    muddogbob

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    Anything for the fj60/62 guys?
     
  19. Varty Yo

    Varty Yo SILVER Star

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    And yet still no 45 kit...
     
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  20. Dan Fredrickson

    Dan Fredrickson Supporting Vendor

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    As for the 60/62's We will need to buy one first...

    I have 2 45's and we will be offering them in a limited fashion, a lot of 45 guys want to stay more stock. It will be a couple of months before these move up on the engineers list...
     
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