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WMS to WMS - D44 vs D60

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Shaggy, Oct 31, 2002.

  1. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Trying to figure out what backspacing to have my Hummer wheels modified to, and one of the factors that I need to figure in is what the difference in WMS to WMS is between the D44 and D60. I could figure it out myself, except that both my old D44 and new D60 are stripped to the knuckles, so that makes it a bit difficult. /forums/images/graemlins/crazy.gif I liked the way my 15x10s with 4.25" fit on the D44, so I want to figure out what backspacing the Hummers need in order to have the outer edge in the same spot. Thanks!</font color>
     
  2. imiceman44

    imiceman44 1 ton status

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    I did some research but I am not sure of the source but here goes:
    1/2 ton D44 to 3/4 ton D44 3" width difference, that means 1.5" on each side.
    1/2ton D44 to D60 4" so 2" on each side.
    Depending on which D44 you had it should be either 1/2" or 2" more on each side.
    I wasn't sure of the 3/4ton stuff that's why I am not sure of the source but I know that between the 1/2ton D44 and the D60 it is 4" difference.
    Hope this helps.
     
  3. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> I have the 1/2 ton 44, so that is exactly what I needed to know. Thanks Iceman. /forums/images/graemlins/thumb.gif </font color>
     
  4. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> OK, I did some research and found some conflicting information. On PBB they are listing the 6 lug 44 as being 67" and the D60 as being 69", so only a 1" difference per side. Can anyone provide some confirmation on these numbers so we can figure out which measurements are true? </font color>
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Please find your source. My D44 front is 69" WMS to WMS. Oddly enough so is my D60...the 1/2 ton d44 should also be 69".

    Rene
     
  6. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Rene, your D44 is an 8 lug, correct? Now I'm hearing that the 8 lugs are 69" and the 6 luggers are 67". Anyone have a complete axle sitting around that they can measure? </font color>
     
  7. imiceman44

    imiceman44 1 ton status

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    Shaggy
    I have both a K5 w/D44 and a Full size Jeep w/D44 both six lug, and one is narrower than the other.
    I will measure them both tonight.
    I don't have any numbers on the 60 though.
    By the way I checked the source that I got my info from, and it turned out to be from FURDS /forums/images/graemlins/smile.gif
    respectively 150,250 and 350 for the 1/2tonD44, 3/4ton D44 and the d60. Maybe that is the reason for the differences.
     
  8. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Yeah, you never can trust Ford to get anything right. /forums/images/graemlins/rolleyes.gif If you could measure the D44 from the K5 that would be cool, but if you have to pull wheels off or anything don't worry about it. If it comes down to it I'll just reassemble the outers on the 44 that's in my garage. Everybody seems to be in agreement on the measurements on the 60, so I'm comfortable calling that one 69 and using that for my calculations. Thanks again! </font color>
     
  9. imiceman44

    imiceman44 1 ton status

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    Too bad you didn't have that questions 2 days ago I had my wheels off switching from one vehicle to the other.
    I will try and get that number for ya tonight
     
  10. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> D'oh, doesn't it always work out like that? /forums/images/graemlins/tongue.gif</font color>
     
  11. 6.2Blazer

    6.2Blazer 1/2 ton status

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    The ORD website has a paragraph about this which states they measured a 6-lug 10-bolt at 67.5", when converted to 8-lug the measurement went up to 69.5". When I converted my 10-bolt from 6 to 8 lug, while I didn't actually measure, it seemed to be accurate since the 8-lug wheels with 4.25" BS had about the same appearance as the 6-lug wheels with 3.5" BS.....

    Concerning the backspacing on the hummer rims to get the same as your 15x10's with 4.25" bs.....
    If you use an 8.25" rim with let's assume the same 4.25" backspacing (and same axle width) then it will be 1.75" further in as compared to the 10" rims with the same bs. In order to get the 8.25" rim outer lip at the same location you would need 1.75" less bs, therefore that would be 2.5" backspacing for the 8.25" wide rims, again assuming the axle width was the same.

    Now if the Dana 60 is 2" wider (1" on each side) than the Dana 44, than you would need 3.5" backspacing. This should put the outside lip of the rim in the same place.
     
  12. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> That is about right, exc ept I'm trying to get teh TIRE in the same place, centered that is. So take that 1.75, cut it in half to get .875, then add that tto the backspacing and you get 4.375, or 4.8, which is what I figured. The 5.38 came from when I thought the 60 was 2" wider on each side, not total. Thanks! I think I'll just go with 4-4.25" backspacing and call it good. /forums/images/graemlins/thumb.gif

    Evan</font color>
     

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