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is there a difference with 3/4 ton rear and a 1 ton rear (14 bolts?)

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by jakeslim, Apr 30, 2003.

  1. jakeslim

    jakeslim 1/2 ton status

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    Whats the diffence if any? Are the internals the same? Are both ff? prefer to get the 3/4 ton because I can't relocate the perches myself and don't want to pay to have it done.
     
  2. outlaw612

    outlaw612 1/2 ton status

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    The only differences are the spring perch location and the shock mounts.
     
  3. jakeslim

    jakeslim 1/2 ton status

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    thanks, just wanted to be sure.
     
  4. wayne

    wayne 3/4 ton status

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    Guts in the housing are the same, shafts are the same, the only difference is the 1 ton brakes are bigger and the perches and shock mounts. Also if you plan to keep it drum braked make sure you have the correct e brake set up on the 3/4 ton axle.
     
  5. amm888

    amm888 1/2 ton status

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    is this the same as with a 1/2 ton vs 3/4 ton...the innerds are the same?
     
  6. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    There are no FF14Bs in a 1/2 ton.
     
  7. Hossbaby50

    Hossbaby50 3/4 ton status

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    Some 3/4 tons came with the 11.5" brakes, and some came with the 13" brakes like the 1 tons used. So both brake options are available in the 3/4 ton package with the right perch mounting locations.
     
  8. morphed86k10

    morphed86k10 1/2 ton status

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    [ QUOTE ]
    Some 3/4 tons came with the 11.5" brakes, and some came with the 13" brakes like the 1 tons used.

    [/ QUOTE ]

    You're partially correct on this. The 3/4 ton 13" brakes use shoes that are about 2.5 inches wide, while the one ton 13" drums use shoes that are 3.5 " wide IIRC. I might be off on the numbers, but I know the one ton brakes have wider shoes/drums.

    So one ton axles have different spring pad widths, shock mount locations, and bigger (wider, not larger diameter) drum brakes.
     
  9. Hossbaby50

    Hossbaby50 3/4 ton status

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    You are correct. I forgot that the 13" is the same between the large 3/4 ton and 1 ton, but the shoe width is different.
     
  10. Derf00

    Derf00 1/2 ton status

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    One more difference, on the 1 ton axles, the e-brake cables run down the drivers side.
     
  11. yellow81k10

    yellow81k10 Registered Member

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    spring perches are easy and cheap to move. had mine moved for about 40 bucks. only other differences are brake drum width and shock mounts
     
  12. morphed86k10

    morphed86k10 1/2 ton status

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    [ QUOTE ]
    One more difference, on the 1 ton axles, the e-brake cables run down the drivers side

    [/ QUOTE ]

    I think that actually has more to do with the year of the vehicle than the axle.
     
  13. jakeslim

    jakeslim 1/2 ton status

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    The spring perches may be cheap to have moved, but moving the axle around town is not easy or desired. I had to rent a van to pick up my d60. If I can pick up a 3/4 ton and be done with it, all the better! If only i could weld....
     
  14. thatK30guy

    thatK30guy 1 ton status Premium Member

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    [ QUOTE ]
    [ QUOTE ]
    Some 3/4 tons came with the 11.5" brakes, and some came with the 13" brakes like the 1 tons used.

    [/ QUOTE ]

    You're partially correct on this. The 3/4 ton 13" brakes use shoes that are about 2.5 inches wide, while the one ton 13" drums use shoes that are 3.5 " wide IIRC. I might be off on the numbers, but I know the one ton brakes have wider shoes/drums.

    So one ton axles have different spring pad widths, shock mount locations, and bigger (wider, not larger diameter) drum brakes.

    [/ QUOTE ]

    ZING! ZING! We have a winner! /forums/images/graemlins/rotfl.gif All the statements you described are true.

    The 11" drums use a 2.5" wide shoe, FYI. /forums/images/graemlins/wink.gif
     
  15. thatK30guy

    thatK30guy 1 ton status Premium Member

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    [ QUOTE ]
    [ QUOTE ]
    One more difference, on the 1 ton axles, the e-brake cables run down the drivers side

    [/ QUOTE ]

    I think that actually has more to do with the year of the vehicle than the axle.

    [/ QUOTE ]

    ZING! ZING! Another winner! /forums/images/graemlins/rotfl.gif

    Actually, the '77 to '84 axles have 'equal-length' cables which fasten to a mount by the forward part of the rear spring hangers.

    The '85 to '91 axles have the passenger side cable running over to the driver side to run '2 into 1' cable. /forums/images/graemlins/thumb.gif
     

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