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79 K30 dually axle ratio?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K1Orion, Nov 23, 2003.

  1. K1Orion

    K1Orion 1/2 ton status

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    I found a K30 for sale here for a steal. The truck has no bed and no seats or windsheild. The guy started on a project and now ran low on $$ and changed his mind.

    My ??? is what gears is this likely to have?
    Its got a 350/465/205 in a 79K30 but he wasn't sure what gears it had.

    Also:
    Are duallies with Gov-loc common? I've got a detroit for a 14ff and would be happy if it the dually had an open carrier. /forums/images/graemlins/thumb.gif
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I would say 4.56 gears before 4.10 but can be either way. /forums/images/graemlins/thinking.gif
     
  3. R72K5

    R72K5 Banned

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    pull cover and see, or find the stamping code on RH axle tube
     
  4. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    Are duallies with Gov-loc common? I've got a detroit for a 14ff and would be happy if it the dually had an open carrier. /forums/images/graemlins/thumb.gif

    [/ QUOTE ]
    One prob, it probably has a D70 because it's a dually.
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

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    [ QUOTE ]
    [ QUOTE ]
    Are duallies with Gov-loc common? I've got a detroit for a 14ff and would be happy if it the dually had an open carrier. /forums/images/graemlins/thumb.gif

    [/ QUOTE ]
    One prob, it probably has a D70 because it's a dually.

    [/ QUOTE ]

    It will have a D70HD if its the dually truck but will have a 14FF if the truck is a chassis-cab version.

    The D70 will be a lot wider than the dually 14FF. If you need to identify the other, check the dif covers and if the D70 cover is identical to the front D60, there's your answer. /forums/images/graemlins/thumb.gif
     
  6. R72K5

    R72K5 Banned

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    its pretty easy, 10 bolt vs. 14 bolts...

    was dana 70 rear only under K30 ?
    since when and through what year ?

    heh
     
  7. 84_Chevy_K10

    84_Chevy_K10 Banned

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    [ QUOTE ]
    was dana 70 rear only under K30 ?
    since when and through what year ?

    [/ QUOTE ]

    Nope, all dually Chevy trucks, probably from early '70s maybe even all the way up to '99.
     
  8. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Many mid 90's to late 90' duallys had 14FF's only.
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Yeah I'm not sure exactly when they changed, that's why I kinda put it up as a broad years thing. Definitely started in the '70s and continued at least partially into the 88-98 body style.
     
  10. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Hey speaking of late model 1 tons... I aam looking at a 95' Reg. cab GMC 1ton 4x4 dually with the 6.5 turbo D and 5spd. It has 92,000 orig miles and alcoas on it. What do you guys think? Should I just wait for the same thing just a crew cab? I like crew cabs. /forums/images/graemlins/grin.gif
     
  11. thatK30guy

    thatK30guy 1 ton status Premium Member

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    [ QUOTE ]
    its pretty easy, 10 bolt vs. 14 bolts...

    was dana 70 rear only under K30 ?
    since when and through what year ?

    heh


    [/ QUOTE ]

    The GM D70HD versions were under both 2 and 4wd's on those trucks that had the fleetside beds with the fiberglass fenders that looked like the stepsides.

    2wd dually trucks had both the 70 and 14 started in '73, but like said above, chassis-cabs had the 14 and fleetside beds had the 70.

    Of course, in '77 when the K30 was offered, it was also both, the 14 and 70 depending on the chassis.

    The 70 has run up to pretty newer years, but not real sure where it stops. I've seen more and more of the newer ('95 on up) 1 ton dually's with 14FF's that have the same wide width as the D70HD. /forums/images/graemlins/thinking.gif
     
  12. K1Orion

    K1Orion 1/2 ton status

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    I went and looked at the truck 4-sale that started my question. It is a 79 K30 that came with a fleet bed.
    350/465/205 D60 and D70 with 4.10

    My buddy has an 85 C30 with 350/465 and 14FF. He doesn't know if it came with a bed or a cab and chasis as it has a dump bed on it now.

    Thanx for the info K30 guy.
     
  13. thatK30guy

    thatK30guy 1 ton status Premium Member

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    [ QUOTE ]
    My buddy has an 85 C30 with 350/465 and 14FF. He doesn't know if it came with a bed or a cab and chasis as it has a dump bed on it now.


    [/ QUOTE ]

    One way to find out if its the chassis-cab would be to measure the wheelbase. The standard LWB truck with a fleetside bed is 131.5" and the chassis-cab is 4" longer. You can also crawl under the rear end and check the tops of the frame rails to see if there are any holes for the bed bolts to go thru. Chassis-cab trucks do not have the holes at all. /forums/images/graemlins/thinking.gif
     
  14. u2slow

    u2slow 1/2 ton status

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    [ QUOTE ]

    One way to find out if its the chassis-cab would be to measure the wheelbase. The standard LWB truck with a fleetside bed is 131.5" and the chassis-cab is 4" longer.

    [/ QUOTE ]

    You'll also notice a 4" gap between the fuel tank and the spring hanger on a 135.5" wheelbase (5' cab/axle dimension) or much more on the 159.5" wheelbase (7' cab/axle).

    I believe GM did away with the Dana 70 rear for '92. I've seen more than a few '91 V30 DRWs with the D70HD. Also the cube vans (G-series) had the wide 14FF starting in '92 also. There was some Dana 70-3 use for 88-91 in the restyled trucks.
     

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