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Dana 70, Dana 44, Eaton HO 72

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by Longhorn4x4, Oct 20, 2002.

  1. Longhorn4x4

    Longhorn4x4 Registered Member

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    I've got a 70 Chevy C30 Longhorn I'm converting to 4x4. I have two Dana 44 frontends, one is a 70 model with 4.56:1 gears, the other is a 75 model with 4.10:1 gears, both are external hub. I also have a 1 1/4 ton M715 six lug Dana 70 with closed knuckles, 4.88:1 gears, and drum brakes. I need to find at least one set of Dana Spicer external locking hubs for the Dana 44s. I also need to find out if anyone knows if there are parts avaialable to convert the Dana 70 to eight lug and disc brakes, and possibly a set of lock out hubs. The rear end is an Eaton HO 72. I need either a set of 4.56:1 gears, or a set of 4.88:1 gears, and some sort of locker. I also need to know where I can buy the removable center panel for the floorboard.
    Thanks.
     
  2. kennyw

    kennyw N9PHW Premium Member

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    If you want to use that truck as a 1 ton (ie carry heavy loads and hard abuse) I dont think the Dana 44's will ever hold up to what you want. You can probably get Dana 60 disc brake outers on the 70 front axle if you replace it from the king pins out but the expense would probably exceed that of a Dana 60. Why not sell the 3 axles you have and put that money towards a Dana 60 with 8 lug and disc brakes??

    A Ford Dana 60 with the reverse cut gears and disc brakes would be stronger than that Dana 70 anyway, just add a divorced Ford version of the NP205 to run it.
     
  3. Longhorn4x4

    Longhorn4x4 Registered Member

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    I already have an NP205 I'm converting, and an NP203, should I get the urge to put a doubler in it. If I buy a Dana 60, it will be a Chevy Dana 60, otherwise I'd have to tear out a bunch of stuff already in the truck.
     
  4. JIMs70K25

    JIMs70K25 1/2 ton status

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    Goto www.67-72chevytrucks.com to look for the center hump. Good message board. As for the front end, What size tires you going to run? If you stay 35" and under put the 75 Dana 44 in. You get disc up front and the stronger steering u-joint. If the M715 front axle is good goto www.M715.com and sell it. What gears are in the eaton?
     
  5. Longhorn4x4

    Longhorn4x4 Registered Member

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    I'll probably put a set of 36" or 38" Boggers on it, I have 35" Ground Hawgs now. Both of the Dana 44s have disc brakes, the 75 model has 4.10 gears, the 70 model has 4.55 gears. The Eaton has 4.11 gears in it, and it's open. The Dana 70 is in excellent shape except for the locking hubs. Someone has suggested that the Dana 70 is NOT from an M715.
     
  6. JIMs70K25

    JIMs70K25 1/2 ton status

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    I was not sure I know the axles on an M715 are 6 on 7.25" bolt pattern. But also closed knuckle and drums. What was under the front of power wagons(M37s)? It might have been the dana70. Running those tires you need to just find a dana60(chevy). I thought all 1970 were drums, at least that's what I have. 8 lug dana44 w/ drums.
     
  7. u2slow

    u2slow 1/2 ton status

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    That Dana 70 front is pretty trick /forums/images/graemlins/thumb.gif

    I saw a guy run one of these under a custom 5-ton sliding deck wrecker. 58-59 Chevy "Spartan 80" sheetmetal. Looked great!

    One place you might be able to find a heavy rear end with the same bolt pattern and ratio is an old IH 3/4 or 1-ton truck. Some of these used that 6-on-7.25" pattern. Could be a Dana 70 or IH's own design.

    The strength is definitely there with the Dana 70 front. If you take it apart, you'll see 1.5" axle shafts, huge u-joints, 4-spider differential, and if you're lucky - a Power-Lock. The only thing you lose on the closed-knuckle is 10 degrees of steering angle (30 vs. 40).
     

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