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Dana 44 HD question and gearing

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by AmericanFreak, Jul 23, 2002.

  1. AmericanFreak

    AmericanFreak Registered Member

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    Ok heres my question I have a dana 44 hd 8 lug out of a 79 chevy pickup.im going to swap it into my 86 blazer with the 10bolt front. now can i take the spindles, rotors and calipers off of the 44hd and bolt them up to the 10bolt? and will this be as stong? Now heres part 2 of the question What gearing would yous recommend for a 300-350 horse 350, th400,Np205, 44HD, FF14bolt, with 38x12.50x16.5 TSl's. Would 4.88s be two low for such a combo? And i still want to drive it around town.
     
  2. RaisedK5

    RaisedK5 1/2 ton status

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    Yes you can put teh spindles, hubs, backing plates, and calipers on the 10 bolt, yes it will be as strong, Use the 10 bolt axel shafts, do not use the 44 axel shafts the splines are cut at a different angle, and you can and i would suggest using the 10 bolt caliper, it'll bolt right on, if you use the 44 caliper you'll have to get new brake hoses, the banjo bolt is a different size,

    As for the gearing, with the th400 and a 38 inch tire you'll be spinning over 3000 on the highway if you go with 4.88s if you don't care about that then go for it, but you might have better all around drivability with 4.56s , I think tyres international, tyres1.com has calculators for gearing vs rpm, check them out.
     
  3. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I'd go with 4.56 unless you intend on larger tires in the future.

    4lo.com has gear calculators.
     
  4. POFF

    POFF 1/2 ton status

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    I put '79 10 bolt brakes, etc on my Dana 44. The inner axles are different but the outer axles are the same.
     
  5. AmericanFreak

    AmericanFreak Registered Member

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    Thanks for the info im happier now cause the 44hd isnt as in good shape as my 10bolt. and i think 4.56s are what im going to go with.
     

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