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Swapping 4.10's for 4.56's in a 14 bolt

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by mountainexplorer, Apr 24, 2002.

  1. mountainexplorer

    mountainexplorer 1/2 ton status

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    Swapping 4.10\'s for 4.56\'s in a 14 bolt

    I have two 14 bolts. One in a '77 Crew Cab with 4.56's, and one out of another truck with 4.10's. I want to keep the 4.56's, and put the 4.10's in the crew cab, without pulling the differential out. Can I do that? Should I even attempt to do the gear swap, having no experience, or should I pay someone else to do it?
     
  2. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    pay someone else to do it...

    J
     
  3. RockBurb

    RockBurb 1/2 ton status

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    Hey weve talked before. If you need some help doing a gear swap, ive done it before, and ive done a 14 bolt before. As far as swapping gears, the 14 bolt carrier is different between the 4.56 and 4.10 carrier. One carrier is good up to 4.10, and the other is good from 4.56 up.
     
  4. HarryH3

    HarryH3 1 ton status Author

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    I'd drop out the diffs, then the pinions and swap 'em between the axles. Then set the backlash and check the pattern. If you get lucky and the pinion depth is right, then you won't have to mess with bearing preload. /forums/images/icons/cool.gif
     
  5. reedmit

    reedmit 1/2 ton status

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    Why don't you just swap the whole darn axles. That way you can't screw anything up. It would even be faster.
     
  6. ChevBlazin

    ChevBlazin 1/2 ton status

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    I second that
     
  7. mountainexplorer

    mountainexplorer 1/2 ton status

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    Normally I would swap the whole differentials (done it many times), but I'm not a welder, and I didnt want to have to re-locate the spring perches. The 1-ton Crew Cab perches sit an inch and a half or so closer together than the regular 3/4 ton 14 bolt I have. If they were the same, It'd probably be sitting on the 4.10 14 bolt right now. Unfortunately, they had to be different.
     
  8. mountainexplorer

    mountainexplorer 1/2 ton status

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    Re: Swapping 4.10\'s for 4.56\'s in a 14 bolt

    What would you charge to do a gear swap like that? The more I think about it, the less I want to do it myself. Maybe I'm just getting lazy.
     

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