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D60 from '74 2 wheel dr 3/4 ton - what to expect in it?

Discussion in 'The Garage' started by crawlink5, Jan 19, 2004.

  1. crawlink5

    crawlink5 1/2 ton status

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    D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    Hello,

    Did a search with no luck. Someone has a d60 rear for sale at work and I was wondering what is/may be in it from the factory. It had a big block 454 from the factory. 1974 3/4 ton pick-up. $100 for the rear.

    Wondering what gears is possibly has, locker, and what lug count it might have before I go to look at it thursday.

    Want to swap the 12 bolt out with the gov-lock.

    Thanks,
    Doug
     
  2. K1Orion

    K1Orion 1/2 ton status

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    8 lug is all I can be sure of. Others will know the rest. Still happy with the 700?
     
  3. sled_dog

    sled_dog 1 ton status

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    Never seen a D60 under the back of a Chevy.
     
  4. SUBFAN

    SUBFAN 1/2 ton status

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    That should be a FF axle with the possibility of having a Power Lock posi unit (very good rebuildable unit)

    Pull the cover and read the numbers, for the axle ratio.

    A D60 axle is plenty strong for moderate wheeling/mud. IIRC 9.75" ring gear, and 1.31" axle shafts. LOTS of upgrade rebuild options for these axles, along with disc swap too.

    I have one with 4.56 gears and P/L that is trying to find it's way under my Burb. /forums/images/graemlins/thumb.gif
     
  5. Beast388

    Beast388 1/2 ton status

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    [ QUOTE ]
    Never seen a D60 under the back of a Chevy.

    [/ QUOTE ]

    D60 rears were found in '72 and older 3/4 tons....along with the Eaton. A 1974 C20 would not have a rear D60.
     
  6. SUBFAN

    SUBFAN 1/2 ton status

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    I never know the year cut offs.... /forums/images/graemlins/ignore.gif
     
  7. R72K5

    R72K5 Banned

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    three ratios came in the 72 older 60;s

    3.54 for big blocks
    4.56 std equipment
    4.10 optional, all in 72 and older trucks GM,

    and later years under dodge and ford trucks,

    GM quit installing 60 rears all way until the big doolies were built later on-= then they went with the 60 rears again just for the doolies,
    otherwise all gm 60s were single rear wheel

    74 would not have a 60 under it factory and whoever said they never have seen a 60 under back of a GM truck has not been around many chevy trucks then, hmm..


    60 axles also have stamping code on pass side axle tube, so,,


    eaton rears were FF and only 3/4 and 1 tron and 3/4 ones were 5200lb and 1 tons 7200lb, only diff between them were brake sizes just liek form 3/4 ton 14 bolt FF to 1 ton 14 bolt FF

    a 74 with 454 would most likely be 3.73, chances are 9 out of 10 of it 3.73

    GM axle ratios rule of thumb for trucks only is bigger engine equals taller ratio and smaller engine equals shorter ratio
     
  8. crawlink5

    crawlink5 1/2 ton status

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    [ QUOTE ]
    8 lug is all I can be sure of. Others will know the rest. Still happy with the 700?

    [/ QUOTE ]

    the 700 is doing great! So is the mpg - well, the mpg is better anyway.

    Thanks for the info, everyone. I did find out it is 8 lug. I'm picking it up Thursday. As for as the truck being a 74, they could be mistaken or it is not original. The people who have it are into funny cars and dragsters, so they may be mistaken. I'm hoping for 3.73s as that is what I have now. I guess I wouldn't be upset at 4.56s though as I want 35s.

    Can you get 6 lug axles for the d60 from a factory setup? What is the wheel sizes available for 8 lug? 15, 16, 16.5 (hope not), 17?
     
  9. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    [ QUOTE ]
    GM quit installing 60 rears all way until the big doolies were built later on-= then they went with the 60 rears again just for the doolies,


    [/ QUOTE ]
    You sure about that? IIRC those are D70s not D60s.
     
  10. R72K5

    R72K5 Banned

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    60 according to gm paperwork crica 81, want me to liost it all out?

    says nothing about 70 being avaialble , in at least 81 anyways

    this is original GM specs sheets book info
     
  11. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Re: D60 from \'74 2 wheel dr 3/4 ton - what to expect in it?

    That's what hapens when you work from memory and not the manual /forums/images/graemlins/blush.gif
     

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