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More axle width info needed

Discussion in 'The Garage' started by divorced, Feb 4, 2005.

  1. divorced

    divorced 3/4 ton status

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    I found this:


    What is the spring perch spacing of front axles?

    What is the WMS of a 14 bolt SF?

    What is the WMS of a 12 bolt and 10 bolt rear?

    What is the WMS of a D44/10 bolt 1/2 ton front?

    What is the WMS of a D44/10 bolt 3/4 ton front?

    What is the WMS of a D60 single wheel front?

    What is the WMS of a D60 dually front?
     
    Last edited: Feb 24, 2005
  2. divorced

    divorced 3/4 ton status

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    ttt, anyone?
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Whats WMS? I can check the 14SF I've got and the 10 bolt, but the 14SF I have no idea on original application, only that it's 6 lug.
     
  4. sweetk30

    sweetk30 professional hooker Premium Member

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    w= wheel

    m=mount

    s=surface
     
  5. atho

    atho 1/2 ton status

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    GM D60 SRW WMS = 69.5" (Dodge D60's are 67.5" if you care)
    not sure on the DRW but i think its in the neighborhood of 77.5"
     
  6. R72K5

    R72K5 Banned

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    cab and chassis 14FF are definitely 63.5 right ?

    or ?
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    DRW 60's are 77"
    SRW 60's are 69.5"


    Spring perch width for a K5 in the rear is around 42.5" or 43". So you would need to get a 3/4 ton 14FFor 14SF to have the correct perch width if you dont want to move them.

    Front perch width for a K5 is 32"(same for 10bolt, D44, 60, etc)

    Correct.
     
  8. R72K5

    R72K5 Banned

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    ok welp then im leaving here in a bit to go measure up the axle on this 72 C-30 157" dually truck then, and try and find someone around there to talk to about it,


    thanks
     
  9. spearchucker

    spearchucker 1/2 ton status

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    This post has some WMS to WMS measurements in it.
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    I didn't measure WMS, but it appears to me that the 14SF I installed in my truck yesterday is about 3" wider than the 10 bolt I pulled out, which doesn't agree with the findings of the post referenced above. Same measurement backing plate to backing plate of the 10 bolt, but the front and rear tires are now even in width, and it's obvious looking down from above the rear wheels, the stock tires/wheels are close to not completely fitting inside.

    This is supposedly a 1997 Yukon (or whatever) axle, but it's been passed down a couple of times, and I don't know the actual origin. It's definitely not out of a solid axle truck, the hub is smaller than SFA truck wheel hubs. Brake drums appear to be "thicker" as well.

    BTW, is WMS measured with the drums on for drum rears, since that IS the wheel mounting surface, or are we just talking the axle flange?
     
  11. CyberSniper

    CyberSniper 1/2 ton status Premium Member

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    GM Dana 60 front (single wheel) ...................69"
    GM Dana 60 front (dual rear wheel) ................77" ; +4" on each side vs single wheel
    GM 14 Bolt rear FF (single wheel) .................67"
    GM 14 Bolt rear FF (dual wheel)....................63"
    GM 14 Bolt rear SemiF (single wheel) ..............66"
    GM Dana 44 Front (single wheel) ...................69" 8-lug; 67" 6-lug
    GM 10 bolt front (single wheel) ...................69" 8-lug; 67" 6-lug
    GM 14 Bolt rear (Van single wheel) ................70"
    GM 12 and 10 bolt rear.............................64"
    GM 14 bolt FF late model ....... depends on vehicle (truck, cube, drum, disc, ring gear)
    GM 14 bolt SF late model ....... depends on vehicle (truck or van or SSR)

    1/2 ton front axleshaft lengths:
    The D44 shafts measure:
    right - 36.13"
    left - 18.31"
    10B shafts measure:
    right - 35.46"
    left - 19.15"
     
  12. divorced

    divorced 3/4 ton status

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    Yep, the axles in the 88-98 IFS 4x4's are wider than most because of the offset wheels they use.
     
  13. R72K5

    R72K5 Banned

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    i just measured a 72 older Eaton C&C dually axle and it is 64 or 64.5"

    so now i another Q:


    GM 14 Bolt rear FF (dual wheel)....................63"



    is that for pickup,,,, or C&C,,, or what ?

    pickup dually axle would be wider AFAIK

    63 sounds like C&C dually width



    thanks
     
  14. Emmettology 101

    Emmettology 101 3/4 ton status

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    C&C width....
     
  15. R72K5

    R72K5 Banned

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    ok

    good deal then

    virtually same width then, even though body and axle model change

    humm,.,.

    interesting, but a good thing

    if thisa 72 eaton turns out to be 4.56 instead of the 4.10 its supposed to be with the 350 and 4 speed combo then im gonna find a 1 ton C&C 14 FF 3.73(or 3.21)?

    i may have no choice but to 14 FF it if the brakes are gone in the eaton,, in which they quite probably are by now,

    ill have to move shocks, but oh well, thats easy cake

    thanks
     

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