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Need Help - 3/4 Ton Rear 1/2 Ton Front Wheels

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 1986Blazer, Dec 4, 2001.

  1. 1986Blazer

    1986Blazer 1/2 ton status

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    This January I will finally get the new 14 Bolt that Brian60s sold me last August installed. I will not, however, be able to install a new front with an 8 lug pattern. With that said, I will install Steel Wheels in the rear with the 8 lug pattern with 35" tires. What I need to know is can I install the same size tires on the front with 6 lug rims? I am planning on 15" rims.......What Size & Offset will be the best to prevent any scraping on the caliper - I really do not want to grind them. Eventually I will put the front tires on 8 lug rims so they will have to fit both rims. Will I come across any problems with different size rims other than the flat tire/spare tire problem. Thanks

    <a target="_blank" href=http://www.geocities.com/keywestk5/KeyWestK5.html>http://www.geocities.com/keywestk5/KeyWestK5.html</a>
    So I says to him, I said, "get your own monkey."
    1986 K5, 350 GM Crate, 700R4, NP208
     
  2. MudFrog

    MudFrog 1/2 ton status

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    You have me confused [​IMG]. If you still have the 1/2 ton axle up front then no you will not have to grind your calipers for a 15" wheel. But when you go to a 3/4 ton front then yes you will. I didn't understand if you were asking if they would rub now with the 1/2 or what.

    89 K5 Silverado, 4", 33's, 3/4 ton axles
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  3. 1986Blazer

    1986Blazer 1/2 ton status

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    Ok.....this is a little difficult. I will eventually change to a 8 lug front D60. #1 Will the 15" rub the caliper regardless of the offset - if so, what is the best offset to limit the scrape to a minimum? #2 Will it just be easier to get 16" front 6 lugs in front (and 16" rears) so when I get the D60 I can just put the same tires on the new rims in front? #3 Will all 16" front rims clear the calipers or will some scrape? #4 Will the 14 Bolt rear end accept 15" rims?

    Thanks

    <a target="_blank" href=http://www.geocities.com/keywestk5/KeyWestK5.html>http://www.geocities.com/keywestk5/KeyWestK5.html</a>
    So I says to him, I said, "get your own monkey."
    1986 K5, 350 GM Crate, 700R4, NP208
     
  4. californiak5

    californiak5 1/2 ton status

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    #1 - Yes........I am unsure what offset would be best for the D60 and 15" rims.

    #2 - Yes

    #3 - Yes they should all fit.

    #4 - Yes

    See Ya,
    Keith

    <font color=green>Born to Drive My K5</font color=green>
     
  5. MudFrog

    MudFrog 1/2 ton status

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    Ok... this is what I did... I ran 1/2 front and 3/4 rear for a while. I bought my wheels and tires I have now 33's on 16.5 (all 8 lug) and I picked up an old used set of 33's on 15" wheels 6 lug. I just ran the mismatched tires till I put my front axle in.. Then just sell the others as spares.

    89 K5 Silverado, 4", 33's, 3/4 ton axles
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  6. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Have you thought about going ahead and just converting the current front axle to 8-lug? It might be cheaper in the long run then buying a pair of 6-lug wheels for the front and it's really easy (if you can re-pack wheel bearings you can convert the front axle to 8-lug). I bought the parts to convert my front 10-bolt to 8-lug for $50.
     
  7. SAVAGE1

    SAVAGE1 1/2 ton status

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    Do it right the first time, rather than buying parts or wheels that you're not gonna end up using. I'd collect all the parts and do the swap all together.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers 14Bolt/ Dana44 4.10's
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  8. 1986Blazer

    1986Blazer 1/2 ton status

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    Awesome....I never thought of that - can you get me a parts list????

    2nd -- do you have any pics of the install?

    I've been repacking my bearings for years, so this ought to be easy. I am assuming it is a matter of a new hub --- how bout new rotors? will the old calipers fit??

    Thanks

    <a target="_blank" href=http://www.geocities.com/keywestk5/KeyWestK5.html>http://www.geocities.com/keywestk5/KeyWestK5.html</a>
    So I says to him, I said, "get your own monkey."
    1986 K5, 350 GM Crate, 700R4, NP208
     
  9. 6.2Blazer

    6.2Blazer 1/2 ton status

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    You will need the following parts:

    caliper supports (aka backing plates) - since the 8-lug brake rotors are larger, you need the 8-lug backing plates which place the calipers higher up.

    8-lug hub (the part the wheel bearings go in to)

    8-lug brake rotors

    Typically you can go to the junkyard and just pull the parts off of an axle, with the hubs and rotors being already together. For the rotors, try to find a set that only need cleaned up or turned so you don't have to buy new ones.

    There were some bearing/spindle size differences on axles back in the 70's (can't remember the exact years), but if you make sure it is a 10-bolt and not a Dana 44 then there is nothing to worry about.

    The locking hubs and calipers will bolt right up to the 8-lug stuff. All you need to do is pull the hub/rotor assembly off, and then unbolt the backing plates (remove the caliper first, and it's a good idea to go ahead and pull the spindle off and make sure the inner spindle bearing is okay). Now, just bolt on the 8-lug parts the same way you would normally put the 6-lug stuff on......easy!
     
  10. 1986Blazer

    1986Blazer 1/2 ton status

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    Hey....another questions just to clear some stuff up. First, I am sure I can get new rotors from the store. I guess I should just ask for 8 lug rotors - do I need to get them for 10 bolt specs or can I also get the same rotors for D44 specs. Second, would NAPA have the hubs with 8 lugs for the 10 bolt front??? I ask because the salvage yard here has no 8 lug front end 4X4 vehicles. I guess the 3/4 ton front end parts will not work??? Right???

    If anyone out there reads this and has these parts, please contact me - I will buy a full set!

    <a target="_blank" href=http://www.geocities.com/keywestk5/KeyWestK5.html>http://www.geocities.com/keywestk5/KeyWestK5.html</a>
    So I says to him, I said, "get your own monkey."
    1986 K5, 350 GM Crate, 700R4, NP208
     
  11. BigTex

    BigTex 1/2 ton status

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    Here you go, Chris...


    <a target="_blank" href=http://coloradok5.com/8lugconversion.shtml>http://coloradok5.com/8lugconversion.shtml</a>

    <font color=red>"SETTING OFF ALARMS IN A CITY NEAR YOU!"</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/BigTex-Mean-Machine>http://coloradok5.com/gallery/BigTex-Mean-Machine</a>
     

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