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D60 FF rear sources??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by jms, Dec 5, 2002.

  1. jms

    jms 1/2 ton status Author

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    If I wanted to find a D60 FF rear axle in a junkyard, what would be the best vehicle to look for? I'd like to get one that has spring perches and shock mount in the correct location - is there such a thing?
    I've read the Jim Allen piece in Off Road Adventures, which referred to GMC vans - anybody know more details? Essentially, I'm mostly interested in the housing, since I figure I'd more or less gut the rest anyway and upgrade, but I can't/don't want to get into welding stuff and move perches and mounts, if at all possible.

    Oh yeah, three tidbits: 1. No, I don't want a 14FF 'cause I want a selectable locker, and who knows when ARB, Eaton, or Offroadtec get around to that. 2. If I go 8-lug, I thought it's better to go FF rather than 14SF. 3. I called Dynatrac just for the heck of it: $5500 for a D60FF rear, high pinion, 35 spline, chrome moly shafts, ARB, disks. Ahem, a bit out of my range....

    Thanks for the info, michael
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Dodge 3/4 ton pickups have them, the diesels have a Dana 70 though. </font color>
     
  3. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    I'm not familiar with GM vans. I would suggest one from a pre-94 Dodge truck, a lot of these were D60HD's which have a little extra ribbing on the center section for housing strength.

    Be aware that 95% of the rear D60's you look at (including D60HD) will have the 1.31"/30 spline axles. VERY FEW rear 60's actually have the 1.5"/35 spline stuff.

    Also, be very careful with any D60 from a Ford van, most are D61's which do not share the advantage of interchangablity with D60's and are also very limited in gear ratios.
     
  4. Blazer1970

    Blazer1970 1/2 ton status

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    Older Ford F250s used them, as well as the Dodge 3/4 tons. Some GM 3/4 tons used them in the early '70s (pre '73). Not sure if any of the above would have the correct spring pad spacing though. The GM ones won't.
     
  5. imiceman44

    imiceman44 1 ton status

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    The GM van D60's are in older (70's ) Van's but the spring perches are not the same, they are wider.
    And I believe they are all 30 spline.
    I think your best bet to find a 35 spline rear is with a Dodge one ton single rear.
     
  6. Beast388

    Beast388 1/2 ton status

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    I've got a rear D60 FF out of a 67 GMC C20 that I will sell you. It has a spring perch spacing of 42.5" on center. The carrier is open and the axles are 1.31"dia 30 spline. I assume you will need to move one of the shock tabs as these both point forward. This axle needs a total rebuild, including a new ring &amp; pinion. I was going to build it but it is less expensive to buy a 14bff that is ready to go. I will let it go cheap....PM me if you are interested. /forums/images/graemlins/thumb.gif /forums/images/graemlins/burb.gif
     
  7. SCOTTS_4X

    SCOTTS_4X 1/2 ton status

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    check out late 60-early 70's 3/4 ton gms. that's where I got mine. they will be 30 spline 1.3 shafts but that's easily cured. the spring pads where in the correct place and all I had to do was move the shock mounts and adapt the brakelines. peice o cake.

    -Scott /forums/images/graemlins/truck.gif
     
  8. u2slow

    u2slow 1/2 ton status

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    Ditto on the 72-older 3/4-ton Dana 60.

    Most had 4.10's as well. Mine had 40.5" spring centers though (like 73-up 1-ton) so if you're careful you might find a 42.5" one - avoiding having perches cut off and re-welded.
     
  9. R72K5

    R72K5 Banned

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    40" and 42.5" are the distances all years of trucks from '63-up

    dana 60 been used sicne at least that year in the trucks,

    1/2 tons had single float dana 60 rear available in 70, was 3.54 because was with the 402 engine option, 42.5" with 2wd pickups and 40" with 4x4 pickups

    3/4 tons all years had them, the longhorns(68 first year for longhorn but are rare) were 40" spacing like blazers and 1 tons were, longhorns were 20 and 30 series and were 1 ton frames/wheelbase which was 133" through 72, 6" longer than a standard longbed pickup

    3.54, 4.10 and 4.56 are the dana 60 ratios through 73, and 3.54 and 4.10 were not standard, and 3.54 is rarest and uncommon to find unless is in a big block truck which was only in 2wd trucks til 73


    67-72 years were odd compared to 73-up


    oh and 90% of the leaf spring rear susp trucks 3/4 ton are dana 60, and alot of the 30 series longhorns too
     
  10. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    eaton sells the E-locker for the 14 bolt, as far as i knew and was told. that was supposed to be thier big debute locker.
    the 8 lug 14 bolt is 8 lug, and can be machined down to 6 lug.
    granted the gears are not as many, but more have been comming out the past few years.
    cost is always an issue to most of us and 14bolt FF can be had CHEAP. i have 2 right now.
    CHEAP.
    Grant
     
  11. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    just pulled one out of a ford today. out of a 77ish 3.4 ton. yeah it wont bolt right up but it is wrkable.
    Grant
     
  12. jms

    jms 1/2 ton status Author

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    Everyone, thanks for the info; I'll probably give it a try this week.
     

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