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need info on front dana 70

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by sapper, Feb 20, 2002.

  1. sapper

    sapper 1/2 ton status GMOTM Winner

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    the one i found has a pass side pumpkin and is suppose to fir chevys. heres the question it has drum brakes. can these be converted and about how old is this axle? thanks for the help

    <a target="_blank" href=http://coloradoK5.com/gallery/Pauls89K5>http://coloradoK5.com/gallery/Pauls89K5</a>
     
  2. mnstr_fx

    mnstr_fx Registered Member

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    I think that is one from the older military trucks. M715 I think or maybe M735's. Does it also haave closed knuckles? The weak spots are out at the hubs.

    76-82 Chevy Pickup / Blazer - K5-K10-K30
    90' TBI
    TH 400
    203 / 205 Doubler
    Dana 60, Corp 14 - 4.88'd - Detroit Locked
     
  3. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Sounds like it is from the military truck.

    If it has the closed knuckles and drum brakes, PASS on this axle. They are weaker than the stock GM D60 fronts.



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  4. 72THING

    72THING 1/2 ton status

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    I agree with thatK30guy, the u-joints inside the closed knuckles are similar to D44 size, so that weak point would completely overrule the fact that it has a 11 1/2" ring gear. Plus I'm not sure you can find parts to convert to disc brakes. There are open-knuckle D70s out there, but they're even more rare than D60s. They were intended for 4x4 motorhomes. I would look for any open knuckle GM D60 front. (The M715 had a closed knuckle D60). Hope this helps.

    Will

    '72 C10, originally 2WD, 6"Springs f+r, Dana 60 f+r, Lock-Right front, welded rear, 4.56s, 350, SM465, NP205, 39.5" TSLs, ORD crossover steering
     
  5. sapper

    sapper 1/2 ton status GMOTM Winner

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    thanks everyone. i got a little excited because its pretty cheap. guess i know why know.

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  6. mudrunner78

    mudrunner78 1/2 ton status

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    you are half right. there are three closed knuckle dana 70's a small knuckle, which has a small u-joint, then theres a large knuckle (i have one) with the 60 u-joint and a 21 spline shaft(need to upgrade that) then theres the large closed knuckle w/ a 30 spline. these axles came under many trucks, not just the m-715, they were under internationals, dodge 1 tons , and even some old construction equipment. I learned about these from calling dana. Hope this info helps, the axle I run is a 21 spline large knuckle, with 3/4 chevy rotors and willwood 4 piston calipers. Jesse

    78 K-10 383, TH-350, NP-203, Dana 70 front, GM 14bolt Rear, 4.56 gears(underconstruction) 78 k-5 stock and rusty
     
  7. MaxCrack

    MaxCrack 1/2 ton status

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    I had a Dana 70HD front end from a 1970 Dodge W300 dually. That thing is a pig and the steering sucks @$$! For some reason I was getting a death rattle at 30 mph. From my experience I would say don't waste your time. Wait a little longer and spend a little more (OK, maybe a lot more) and get a D60. Disk brakes are possible. I found a few places when I was looking, but the strength thing kind of makes it worthless, especially when you consider how much it weighs.

    <font color=blue>I'll bet that, regardless of the reason, the people in the E.R. always giggle when they pull something out of someone's ass.
     
  8. mudrunner78

    mudrunner78 1/2 ton status

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    how would a 30 spline dana 70 be weaker than a dana 60 considering the u-joints are the same in the large knuckle. I just wonder why people hate 70's so much. I know the a good ones and bad ones, but I have seen them run very sucessfully. there is a reason I don't like mine the housing is huge. Again these are my opinon's and I would like to upgrade mine to 35 spline outers. Jesse

    78 K-10 383, TH-350, NP-203, Dana 70 front, GM 14bolt Rear, 4.56 gears(underconstruction) 78 k-5 stock and rusty
     
  9. 6.2Blazer

    6.2Blazer 1/2 ton status

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    M-715's run a closed knuckle Dana 60 in the front and a Dana 70 in the rear.

    I have heard of some older International 1-ton pickups with the Dana 70 front also.

    I think the reason the Dana 60's are more popular because they are direct bolt-ins and already have disk brakes and open knuckles....plus most are going to be stronger than most of the front 70's.
     
  10. m j

    m j 1/2 ton status

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    the 35 spline outer are FROM dana 70 fronts
    people get down on the 70 because they heard it is junk.
    like every other dana axle it depends which one, some are 'best of best' some are not

    formerly 77chev
    still a jerk though
     
  11. MaxCrack

    MaxCrack 1/2 ton status

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    Yes you have a good point. Mine was the big one so the strength was probably the same, but I just had too much trouble with the steering on that thing. And it weighs SO much more.

    <font color=blue>I'll bet that, regardless of the reason, the people in the E.R. always giggle when they pull something out of someone's ass.
     
  12. mudrunner78

    mudrunner78 1/2 ton status

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    steering is not bad for me cause I have a crossover conversion, not the tierod that goes behind the pinion. But I hear so much about 60's. For the price of a 70 plus adding bakes and crossover you still pay less than most 60's. Again this is if people want to run this hog. I think the weight diff is around 62lbs, weighed mine then a buddys 60. I am happy with my 70 and if put money into axles again I will buy rockwells.

    78 K-10 383, TH-350, NP-203, Dana 70 front, GM 14bolt Rear, 4.56 gears(underconstruction) 78 k-5 stock and rusty
     

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