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10bolt to d44 conversion

Discussion in 'The Garage' started by SUB-ZERO, Nov 20, 2005.

  1. SUB-ZERO

    SUB-ZERO 1/2 ton status

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    I am converting my buddies Jimmy axles from 10bolts front and rear to 12bolt rear d44 front.(his 10bolt rear broke a spider gear and the 12bolt we got has a different but better gear ratio).My question is this...the front driveshaft on the d44(from a 1977 K5) and front driveshaft on the Jimmy(1987) attach differently to the axle.The Jimmy uses straps and bolts and the K5 had u-bolts.How can I make this work?
     
  2. rick88blaze

    rick88blaze 1/2 ton status

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    It should work just fine without any problems. I did this switch on mine almost 2 years ago. Both use the same u-joint, and using the u-bolts is better than the straps. :D

    Rick
     
  3. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    They should still both use a 1310 u-joint. Just hook the thing up. I swapped the axles on my '73 & '80 and had no problems. Same deal; D44/12B & 10B/12B.
     
  4. slowk5

    slowk5 Registered Member

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    I think the 87 would have a flange type cv and the 77 should have a spicer type cv yoke.not sure what the year that they changed is.Just take a look i might be wrong.
     
  5. rick88blaze

    rick88blaze 1/2 ton status

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    He can still use the same driveshaft that's in the Jimmy now. The only reason he might not be able to use it is if someone put different size yoke on the D44. A 10 bolt and D44 still use the same size u-joints if the yokes are stock.

    Rick
     
  6. Leper

    Leper 1/2 ton status

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    Why are you taking the time to swap a 10 bolt for a 44? There is no real strength difference between the two.
     
  7. SUB-ZERO

    SUB-ZERO 1/2 ton status

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    'Cause the 12 bolt and the d44 has 3:73 and the 10bolts both have 3:42.
     
  8. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Same reason for me, 10B/12B had 4.56s and a Detroit rear, the D44/12B had 3.08s 7 a L/S rear. (Both fronts open.)
     

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