Driveshaft Loop Needed?

Discussion in 'Street/strip 400/430/455' started by Bogus919, Aug 22, 2022.

  1. Canadian GS 350

    Canadian GS 350 Well-Known Member

    Poly mount- so bolted it up to spare tranni, crossmember. I can move ends of crossmember up and down quite easily. Dont think this is going to be an issue guys. BE31BF78-FD1F-43D3-9E62-B87A2D783128.jpeg
     
    patwhac likes this.
  2. hugger

    hugger Well-Known Member

    So what happens is there are interlocking tangs inside the mount,..the rubber engine mounts will allow more twist than the poly and you end up with something having to give,...the thicker bells on dime th400s will stand up to this much better than the thin bell trans
     
  3. hugger

    hugger Well-Known Member

    The TR guys have straps that work fine so any TR vendor has those,..or a chain off the PS bracket down to the frame off a tab
     
  4. got_tork

    got_tork Well-Known Member

    I'm running rubber motors and poly trans mount with TR strap. Definitely wanna run some sort of tie down with rubber/poly mount and more so if your running TH350.
    Chris
     
  5. Marv Marksberry

    Marv Marksberry Well-Known Member

    This is how I installed a torque strap on my GS. It connects to the plate that I added to the front of my Aluminum head. Much easier to do when you don’t have a power steering pump in the way.

    FBAA2AA0-716D-41DA-8C48-1B4D4A6227AF.png 59A3B098-1C7D-4F94-A796-5CCE891F6C0E.png
     
  6. Canadian GS 350

    Canadian GS 350 Well-Known Member

    Thanks guys. I’ll figure something out when I install the 470, as I have to space the accessories to line up with my ATI balancer. So the plate on head is a good starting point.
     
  7. hugger

    hugger Well-Known Member

    That's where my experience comes from ,..3 broke th350 bells b4 figured it out
     
  8. 1973gs

    1973gs Well-Known Member

     

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  9. Canadian GS 350

    Canadian GS 350 Well-Known Member

    82CED33C-AF26-4BE0-A982-B0E0C71455CB.jpeg Fortunately i have the HD case, but will be adding torque strap. Here is description of required materials. I used 1 1/2 long 7/16 bolts to attach mount to tranni. With the 3/16 plate, plus the Energy Suspension mount plates, you’ll want min 1 1/4 inch long bolts. The angles can be copied by using 1/4 graph paper and match the template. Again, this was for my turbo 400, short tail shaft in a GS.
     
    patwhac likes this.
  10. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    How much does it weigh?
     
  11. Canadian GS 350

    Canadian GS 350 Well-Known Member

    About 6 lbs using my bathroom scale. I need to shed 10 lbs of Christmas fat!!
     
    patwhac likes this.
  12. 12lives

    12lives Control the controllable, let the rest go

    Sorry for hijacking the thread on the installation of a u-joint - just trying to clarify. Let me know if I got it right. Also I fixed the diagram in post 91.
     
  13. Canadian GS 350

    Canadian GS 350 Well-Known Member

    C2AB8C99-BDEF-449E-8D2A-87757B534FFC.jpeg 6869FECF-7F1E-4474-AC9B-9868B654C485.jpeg All bolted up
     

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  14. FLGS400

    FLGS400 Gold Level Contributor

    Wow, looks great. No way a tech inspector is gonna miss that! :D
     
    Brett Slater likes this.
  15. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    I hold before you my driveshaft loop(The Zepnick Loop) 20230316_174947.jpg 20230316_175018.jpg 20230316_180234.jpg 20230316_180240.jpg 20230316_180403.jpg 20230316_180714.jpg . Just put primer on it. It bolts to the underside of the crossmember. $80 in material which I still overpaid I think.
     
    Tomahawk, Mark Demko, patwhac and 4 others like this.
  16. patwhac

    patwhac Well-Known Member

  17. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    Yea wasn't hard, if I can do it, anyone can haha!!
     
    patwhac likes this.
  18. Mark Demko

    Mark Demko Well-Known Member

    WOW! Looks great!!
    80 bucks in materials does make yah think if it’s better to buy one ready made, BUT I understand the satisfaction of doing it yourself :D
     
    FLGS400 and Jeremy Zepnick like this.
  19. patwhac

    patwhac Well-Known Member

    When I was pricing this out, I felt like most of the material cost was coming from the 5" ID tubing to make the actual loop part. What's to stop someone from making a rectangular shaped one using cheaper 1/4" wall flat bar mild steel?
     
    Mark Demko likes this.
  20. hugger

    hugger Well-Known Member

    Roll the flat bar into a hoop
     
    Mark Demko likes this.

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