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82 K5 6.2 Axles

Discussion in 'Differential & Driveline' started by The88, Apr 30, 2019.

  1. The88

    The88 What's broken this time?

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    Like the heading reads my question is what came in those bad boys stock? I have a lead right now on a top, axles, various other parts, wheels and tires for just a couple hundred bones. I asked the ole boy and he is unsure of what kind of axles they are. I am just trying to make idle chit chat and see what they could possibly be before I get home and take a look at them.

    https://www.ebay.com/itm/283464425595?ul_noapp=true


    *** Scratch the question, Quick google search got my answer. Thanks***
     
    Last edited: Apr 30, 2019
  2. rpcraft

    rpcraft Full Access Member

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    Not sure what GM was thinking or why but I have noticed that usually GM Diesel axles (like the half ton 10 bolts and what not) usually have absurdly tall gearing, like in the range of 2.72 or best 3.08. I'd avoid them unless you already have plans on rebuilding them and putting better gear ratio's in them. He probably knows what's in them but is playing dumb hoping someone will screw up and pay some money for them. They are worthless for running stock if that is the gear set they have.
     
  3. The88

    The88 What's broken this time?

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    Yeah I am gonna check out everything he has. I may see if he will take a crisp $100 to clear out his garage. We shall see if I can jew him down.
     
  4. CSFJ

    CSFJ ----------------- Supporting Member

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    Tall gears in the diesel axles probably have a lot to do with the engine redlining at 3500 rpm. For any of them to be usable on the highway, they need that gear.
     
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  5. rpcraft

    rpcraft Full Access Member

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    Makes sense now.
     
  6. crpntr78

    crpntr78 Full Access Member

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    I bought a GMC C2500 parts truck that had the 6.2 diesel in it. The rear end was a 14 bolt G80 with a 3.42 ratio. Hope this info helps.
     
  7. rpcraft

    rpcraft Full Access Member

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    I think we are mostly talking about squares and the corresponding 10 bolt axles.
     
  8. Frankenchevy

    Frankenchevy . Supporting Member

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    Street driven diesels need the tall gearing to match low engine speed. I’ve heard the cucvs with 4.56s topped out at 50mph.

    Doesn’t sound very fun anywhere but driving around on base.
     
  9. The88

    The88 What's broken this time?

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    4.56 in low range in a diesel would probably be grunt from hell
     
  10. rpcraft

    rpcraft Full Access Member

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    Pretty sure to most of us 6.2's are the definition of grunt already, just a different definition, lol
     
  11. The88

    The88 What's broken this time?

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    Roger that. I never had the pleasure to ride in a 6.2. Had a 6.5t in high school that was no slouch for the time.
     
  12. Frankenchevy

    Frankenchevy . Supporting Member

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    6.2s served their purpose, but aren’t anything to write home about. My cousin still has his plugging away, but I can probably beat it on foot in a 100 yard race, lol
     
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  13. rpcraft

    rpcraft Full Access Member

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    lol
     
  14. Frankenchevy

    Frankenchevy . Supporting Member

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    I’m sure 4.56s and a 261 ratio np208 combined with the 6.2 would climb a wall if they had the traction.

    I’m weird though. If I were a blue collar guy in the 80s buying a new square, i’d probably give the 6.2 serious consideration in the hopes of tweaking it for good economy and longevity. Those are still my two main considerations for engines.

    Although, if I were said guy doing what I do now, having to tow tractors fairly often...I’d probably have little choice but to go for the 454. Actually, I’d probably need a C50 to tow my John Deere 410 regularly without beating the crap out of the tow vehicle.

    Then again, I’m the guy in the slow lane doing 60 with the semis by choice anyhow...
     
  15. CSFJ

    CSFJ ----------------- Supporting Member

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    Actually running about 3200ish @ 55mph. I could squeak 60mph out of mine when I had it, but that was about the limit.
     
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