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Besides the obvious (axles) what differences in 1/2 vs. 3/4 T?

Discussion in '1936-Present Suburban' started by BurbinOR, Oct 7, 2002.

  1. BurbinOR

    BurbinOR 3/4 ton status

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    Is it simply the axles? /forums/images/graemlins/burb.gif
     
  2. Muddytazz

    Muddytazz 1 ton status

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    axles and springs, thats pretty much it
     
  3. FLASHLIGHT76

    FLASHLIGHT76 1/2 ton status

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    Not much else. I know the 1/2 tons sit lower stock. The trans could be a weak 350t and you would probably have smaller drive shafts if not U joints. It really depends on the set up it comes with. Even in 3/4 there are still differences. If you have the factory tow package on a 90's model you usually came with 4:10's and a turbo 400 , otherwise you would have the 700r4. Just depends on the truck. /forums/images/graemlins/burb.gif
     
  4. Ddragggon

    Ddragggon 1/2 ton status

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    there's actually more to it then just the axles. the rear springs in a 3/4 ton are 56 inches long on all years but 73 and 74. 1/2 tons are only 52.

    Spring hangers are longer, to lift the truck a little higher off the ground, and give it better ground clearance then the 1/2 tons.

    generaly the 3/4 tons came with a TH400 tranny, instead of the TH350, but this isn't always the case... my K20 suburban came with a T350, as did my friend roberts. he had a C20 pickup with a Th350 under it too. truthfully, the only things that generaly got the TH400 were bigblocks, and super heavy duty trucks.

    thats all I can think of right now... probably more that I forgot,

    -Rich
     
  5. BurbLover

    BurbLover 1/2 ton status

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    Didn't they shitch the 1/2 tons to a 56" spring midway throught the 88 model year?
    /forums/images/graemlins/burb.gif
     
  6. FLASHLIGHT76

    FLASHLIGHT76 1/2 ton status

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    You know it's a funny thing about that. Superlift tried to tell me that all subs had 52" set up reguardless. I kept trying to tell them that my 89 has 56inchers. I believe your right about the half tons having the 56 inchers as well. I know that the 93+ have them on the half tons. It gives the subs that nice cushy ride yet retains load ratings. My 95 1/2 is set up with the 56's /forums/images/graemlins/burb.gif
     
  7. tomseviltwin

    tomseviltwin 1/2 ton status

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    my 87 3/4 ton has an oil cooler on the engine, my 83 1/2 ton did not. Also, I've got an th400 as oppose to 700r4, and 1350 rear ujoints. /forums/images/graemlins/pimp1.gif
     
  8. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    </font><blockquote><font class="small">In reply to:</font><hr />
    my 87 3/4 ton has an oil cooler on the engine, my 83 1/2 ton did not. Also, I've got an th400 as oppose to 700r4, and 1350 rear ujoints.

    [/ QUOTE ] same here on my 89, a th400 oil cooler and 1350s
     
  9. jimmy88

    jimmy88 1/2 ton status

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    My 88 1/2 ton has the oil cooler, I think its just part of the towing package, prol the same for 3/4 tons.
     
  10. Ddragggon

    Ddragggon 1/2 ton status

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    yeah, the oil cooler is strictly a part of the `Trailering Special' tow package. my 77 C20 had one, my 73 C10 had one, and my dads 91 S-10 trailering blazer has one. ( I attribute the almost 300,000 miles the engine has on it to the oil cooler too)

    -Rich
     
  11. chvyhs

    chvyhs 1/2 ton status

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    My '90 3/4 ton doesn't have and oil cooler. I'm installing one this weekend though. Does anyone know if there's a difference between the piece that goes between the filter and the block for a 78 big block and one that would work for my Sub?
     
  12. Burbinator

    Burbinator 1/2 ton status

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    In my opinion, '91 was the best year for the 3/4 tons...

    In addition to the axles and springs, my truck has the 4L80E, oil cooler, trans cooler and P/S cooler. A quick check of the RPO's say it is all from the factory. I suppose it is all a matter of how the truck was originally ordered.

    Every time I find out something new about my truck, I have to smile thinking of how bad I "stole" it from the previous owner!

    /forums/images/graemlins/burb.gif
     
  13. BurbinOR

    BurbinOR 3/4 ton status

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    That DOES sound like exactly what I want..............exactly.

    Do you know where a RPO code designator/translator is located on the web or wherever? I'll need it when I look at some Burbs..........thanks. /forums/images/graemlins/thumb.gif
     
  14. Burbinator

    Burbinator 1/2 ton status

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    I found most of mine here. Scroll down on the page for links to the RPO families.

    Also, thirdgen.org has a decoder here.

    /forums/images/graemlins/burb.gif
     
  15. BurbinOR

    BurbinOR 3/4 ton status

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    Thanks ! /forums/images/graemlins/thumb.gif
     
  16. JAXSTER

    JAXSTER 1/2 ton status

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    It's all bigger!
    [​IMG]
     
  17. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    JAXTER... NICE SUBURBAN!! /forums/images/graemlins/shocked.gif /forums/images/graemlins/cool.gif
     
  18. Burbinator

    Burbinator 1/2 ton status

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    No problem...

    /forums/images/graemlins/burb.gif
     
  19. Muddytazz

    Muddytazz 1 ton status

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    I've found a bunch of mine HERE
     
  20. Ddragggon

    Ddragggon 1/2 ton status

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    well, just when I knew what I was talking about, my parts truck completely proves me wrong....

    my 73 C10 out in the middle of nowhere has 56 inch 9 leaf springs under it. I'd never seen them on a 1/2 ton vehicle before, but hey: first time for everything donchaknow.
     

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