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Axle swap Q's??

Discussion in 'The Garage' started by southernspeed, Oct 6, 2005.

  1. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Does anyone know if the axles from my '78 (10 and 12 bolt, th350/203) will bolt straight up under my '91? (,10 and 10 bolt, 700/241)
    Will they bolt up ok and use the '91 props? Is the drag link end the same?
    Thanks.
     
  2. blazerguy 90

    blazerguy 90 1/2 ton status

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    They should be a direct bolt in, but why do you want to swap your 10 bolt front and 10 bolt rear for another 10 bolt front 12 bolt rear ???, your not gaining anything.
     
  3. SUBFAN

    SUBFAN 1/2 ton status

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    If he has better gears/parts in the donor set he is....
     
  4. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Why, well.......mid life crisis I think! :doah:
    At the moment I have a rusting '78. Lifted, 35's with beadlockers, 4.10's with lock-rite. Fresh 350tbi, fresh th350 etc etc.
    I also have my DD. A '91, completely stock with 160,000 miles on it but NO RUST!
    Now the nasty bit.....I'm buying a new DD. And it's a ...errmm...D*dge 1500 :o
    So the plan is to part out the '78 putting the geared axles and 35's on my '91, freshen up the 700r4 in there and put the fresh built motor out of my '78 into the '91 (still with me?).

    So one more question I have is, will the '78 front springs fit the '91? I've noticed that bushing kits for the 2 trucks are different, anyone know why?
    And if they don't should I go for BDS or EZride (rough country/tough country???) for a smooth ride in +4"?
     
    Last edited: Oct 7, 2005
  5. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    No one know if these early springs will fit my '91????
     
  6. u2slow

    u2slow 1/2 ton status

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    Springs should fit. 72-older were the shorter ones.

    Dunno why the bushings would be different... maybe they changed the spring eye diameter?
     
  7. dremu

    dremu Officious Thread Derailer Premium Member

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    IIRC, the bushings are different for 90-91ish. SouthernSpeed, check out the ORD pages for bushings maybe?

    -- A
     
  8. Corey 78K5

    Corey 78K5 1 ton status

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    You will need a new rear u-joint to mate the 12 bolt to the drive (shaft) line in the 91. Someone on here should know the NAPA part # it will have two different size caps on it. Basically it's a conversion u-joint.
     
  9. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    The 10 bolt shaft is so close to 1330 , but I hear its not , its GM 3r or s44 .

    The joint to go from 10 bolt shaft to 12 bolt ( auto truck ) shaft is 3-3130 .

    My CV is already made for 12 bolt , but my original shaft I carry as a spare has that joint to go from 10 to 12 bolt ( auto truck ) .

    You should be 1310 on the 12 sdince you have an auto . They did come 1350 behind 4 speeds , I know I have a 1350 12 bolt in the garage :D
     
  10. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Can someone give an actual part number I can order? And what about the front drive shaft, will that bolt straight up.
    I'm flying over to NJ next week to buy a truck from Pine Belt Chevrolet. Is this something they would have/could get or is it strictly an 'aftermarket' supply part?
    Is this an actual order number for the UJ? 3-3130
     
  11. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    TTT on this question?
     

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