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Dana D50 TTB Part Number Confusion

Discussion in '6.9L IH & 7.3L IDI Diesels' started by adamsanders, Feb 9, 2019.

  1. adamsanders

    adamsanders Full Access Member

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    I am trying to order parts to freshen up the front end on my 1991 F250 with a D50. I was planning on using RockAuto to order most of the parts but I am getting confused on parts for the D50 vs the D60. On several components, the two options seems to be a 3850 lb axle (D44) and a 4600 (D60). I believe the D50 is considered a 4600 lb axle as well but that would mean it takes all the same parts as a 60. Is this true? Specifically, I am trying to use all Moog components and the P/N's I am coming up with are:

    Front U Joints (all three) - Moog 231
    Upper Ball Joints - Moog K8435
    Lower Ball Joints - Moog K80026

    Can someone confirm this? Thanks
     
  2. nj_m715

    nj_m715 government's finest Supporting Member

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    they're probably the same. I found junkyard d50 hubs, rotors, locking hubs, outer stubs etc for my d60
    the price was lower because it's d50 lol
     
  3. Macrobb

    Macrobb Full Access Member

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  4. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    Same ball joints for 50s and 60s
     
  5. BR3

    BR3 Full Access Member

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    Second on Wes. The 3850 is the d44 hd, outers are 100% the same between 50/60. In fact the 50 ttb springs are stiffer to accommodate the torsional twist on the arms

    Sent from my Moto Z (2) using Tapatalk
     
  6. adamsanders

    adamsanders Full Access Member

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    Awesome, thanks!
     
  7. compressionignitionrules

    compressionignitionrules Full Access Member

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    Dana 50 TTB springs have a negative arc to them....dana 60 springs have a positive arc.
     
  8. BR3

    BR3 Full Access Member

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    Correct, but the actual weight capacity per pair is 4600 for the ttb springs and 4400 for the solid axle, regardless of arch position
     
  9. compressionignitionrules

    compressionignitionrules Full Access Member

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    that makes no sense at all , the F350 4x4 single wheel has a higher GVW than an F250 4x4 same truck except for the dana60 front. what the hell where they thinking ?:Q
     
  10. BR3

    BR3 Full Access Member

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    The total design was a little less than intuitive in my opinion, but the spring rate was nessisary given the pivot points leverage factor. The ttb twists up on frame center, and the solid axle twists up on the opposite wheel. I'm honestly surprised 200lbs was enough haha. The gvwr is in my opinion somewhat of an ether number anyway between the obs 250/350. The 2wd trucks could be optioned exactly the same, save the door sticker
     

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