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Who has 4" blocks?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Lotsa_Faith, Sep 17, 2001.

  1. Lotsa_Faith

    Lotsa_Faith 1/2 ton status

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    Who has 4\" blocks?

    one guy has 4" blocks, 3" body and 36's that i know, and he said he can't even really notice 'axle wrap'. is this true? or is he just sayin that cause that's what he has? this truck is used purely for muddin....

    Mike Dee
     
  2. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Re: Who has 4\" blocks?

    I have blocks and my axle wraps something fierce. Tell him to hold the engine against the brakes to torque up the axle some, and have a buddy watch the axle. It will move so much that you'll think you are going to break a spring in two!

    No axle wrap with 4" blocks... HAH!

    <font color=red>Just give me a tank, and point me in the right direction!</font color=red>
    <font color=blue>DONT MESS WITH AMERICA!</font color=blue>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  3. Burt4x4

    Burt4x4 3/4 ton status

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    Re: Who has 4\" blocks?

    I doubt it!
    I had 4"blocks and I am convinced they were the reason I twisted my 12bolt on a hill climb!
    Mabie he only drives on pavement?
    Save some $$, how ever long it takes, and get springs or do a flip or both but just say NO to blocks!!

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <a target="_blank" href=http://www.geocities.com/baja/5099>www.geocities.com/baja/5099</a>
     
  4. pcorssmit

    pcorssmit 1/2 ton status

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    Re: Who has 4\" blocks?

    My Dodge has 4 3/4" blocks, stock. Axle wrap is terrible w/the 5 spd and brass clutch.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  5. Cmoe

    Cmoe 1/2 ton status

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    Re: Who has 4\" blocks?

    He must have Traction bars.....Mine wrap so much that it makes an "S" of my spring.....What's his secrete?

    C'moe

    <font color=black>the blazer is "Back in Black"
     
  6. TX Mudder

    TX Mudder 1/2 ton status

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    Re: Who has 4\" blocks?

    I've had 4" blocks since I lifted it 6" a few years ago. I don;t NOTICE axlewrap but that doesn't mean I don't have it. More than likely I do (it's physics.) But for the fourwheeling I've done, it isn't noticable to me. I intend to replace them with either new springs or a shackle flip, but I have no desire to mess up my pinion angle with the flip and no one has been able to say really how much it will be off on a LWB truck.
    In my opinion, blocks are a temporary lift that should be done properly a money allows.
    -- Mike

    <font color=blue> At some point I'll be done building my truck and can actually go wheeling. Until then, I guess sex and alcohol will have to do. [​IMG]
     
  7. BorregoK5

    BorregoK5 1/2 ton status

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    Re: Who has 4\" blocks?

    I'm still running my 4" blocks with 33's and I feel the axle wrap. It's most evident off idle from a stop and feels like the back end is chatty but after that its hard to feel at all. If this guy with the 36's doesn't have any axle wrap, he must be triangulating the rear end with something to prevent it.

    What, Me Worry?
     
  8. pcorssmit

    pcorssmit 1/2 ton status

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    Re: Who has 4\" blocks?

    New rear springs are no gaurentee of a perfect pinion angle. With drivetrain differences, spring diffs, shackle diffs, etc, the only real way to find proper pinion angle is with an angle finder. They're like $10 at Sears, less at Harbor freight. Do the flip or get the springs installed, use the angle finder to figure out how far you are off, and put in the proper shims. I needed 8 or 10 deg. shims on mine (forget which), this is on a short wheel base w/long drive train. BTW, with the shackle flip, I had to rotate my pinion DOWN, not up.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     

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