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Projects How to change 8 lug axle to 5

Discussion in 'The Hokey Ass Message Board' started by 61 Rodluver, Jan 26, 2019.

  1. 61 Rodluver
    Joined: Jan 18, 2019
    Posts: 5

    61 Rodluver

    I e got a 61 Chevy C20 wanna keep factory rear end will switch out 4.57 gears but wanna change axles so I can get to a 5 lug. Any tips and sources for axles?


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  2. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,015

    Hollywood-East
    Member

    Half ton Chevy axle is 5x5" later...
     
  3. bryanyeskie
    Joined: Jun 13, 2016
    Posts: 157

    bryanyeskie
    Member
    from Hixton

    Cut 3 lugs off
     
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  4. bdynpnt
    Joined: Feb 9, 2009
    Posts: 354

    bdynpnt
    Member

    You can't it's the full floating hubs that are 8 lugs there were no 5 lug ones

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  5. porknbeaner
    Joined: Sep 12, 2003
    Posts: 41,124

    porknbeaner
    Member

    Yup this is correct. Guess you could cut the housing ends off and replace them with car or 1/2 ton truck housing ends and then get custom axles made to fit.

    Other option would be to keep the floaters and re-drill the flanges. I would imagine that you would then have to get custom wheels made with the proper clearance for the axle ends and the proper bolt circle. Probably find something in the roundy round world.

    Here is something to think about. Back when the hard core dragster guys (think door slammer here) were using a spicer 60 for a rear they just ran steelies on the rear. If it is wheel choice there is nothing in the world wrong with a reversed steely on a truck.
     
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  6. DDDenny
    Joined: Feb 6, 2015
    Posts: 12,357

    DDDenny
    Member
    from oregon

    I took the easy way out on my 66 Suburban when I did a front disc brake swap, I called Moser Engineering and had them send a pair of new stock replacement axles with 5 on 5" bolt pattern.
    Then a year later I had Dutchman narrow the housing 12 inches and shorten and respline the axles.

    http://www.moserengineering.com
     
  7. squirrel
    Joined: Sep 23, 2004
    Posts: 43,671

    squirrel
    Member

    sell your truck and buy a half ton truck, if you want a half ton truck.
     
  8. Pat Thompson
    Joined: Apr 29, 2012
    Posts: 172

    Pat Thompson
    Member

    I have welded up several 9" Ford axles and redrilled them Chevy pattern.
     
  9. 1946caddy
    Joined: Dec 18, 2013
    Posts: 1,500

    1946caddy
    Member
    from washington

    Is your plan to continue with the C20 suspension and the eight lug up front?
     
  10. Mr48chev
    Joined: Dec 28, 2007
    Posts: 25,639

    Mr48chev
    ALLIANCE MEMBER

    All jokes aside you can't get there from here with that rear axle.
    If you are wanting 5 on 4-3/4 to match 49/54 car hubs on the front there isn't room enough for the lugs to clear the hub. I went out and measure a 3/4 ton axle I have out of a 72 and the hub is 4-1/2 inches in diameter meaning that the hole in the wheel has to be 4-1/2 inches in diameter + to fit over it. That probably leaves the only 5 lugs wheels that would possibly fit being Ford pickup wheels.
    It just isn't practical to try and use 5 lug wheels on that axle. You would have to have one off custom and very expensive axles made to be able to cut the ends off the axle housing and weld Ford 9 inch ends on (easiest to get) but the expense would be unreal when it all said and done.
    It would be a whole lot easier and less expensive in the long run to have Moser, Dutchman or Curry build you a 9 inch Ford rear with the desired gears, wms to wms width and bolt pattern.
     
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  11. rusty valley
    Joined: Oct 25, 2014
    Posts: 761

    rusty valley
    Member

    and, that gm commercial axle had very little to offer for higher gear sets. 411 is about it as i remember
     
  12. GearheadsQCE
    Joined: Mar 23, 2011
    Posts: 2,157

    GearheadsQCE
    ALLIANCE MEMBER

    Rodluver,

    What are you trying to accomplish? You can get to a 5 lug using your axle as a starting point, but why?

    If you want 5 lug wheels and retain the strength a 3/4 ton axle bearing you need NASCAR style hubs. These have 2 1/2" axle snouts and full floating hubs. Hubs are generally 5 on 5" BC. Still have to have custom axles made, about $500.

    I have a Quickchange with this hub set up in my shop truck. Uses 31 spline axles.(Around $100 ea. brand new)

    By the way, I used Stock Car front hubs on 3/4 ton spindles. Bearings had to be honed .001".

    5 lug front and rear no sacrifice in strength.
     
  13. bdynpnt
    Joined: Feb 9, 2009
    Posts: 354

    bdynpnt
    Member

    What you could do is get the spindles and brakes off of a 72 or newer half ton with 5 on 5 bolt pattern along with the rear axle and you would be set the later spindles will fit the earlier independent suspension trucks

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  14. squirrel
    Joined: Sep 23, 2004
    Posts: 43,671

    squirrel
    Member

    60-62 are not the same as 63-66

    Sent from my Trimline
     
  15. bdynpnt
    Joined: Feb 9, 2009
    Posts: 354

    bdynpnt
    Member

    Oh I thought they were I helped a friend do a 64 with 78 spindles

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  16. Mr48chev
    Joined: Dec 28, 2007
    Posts: 25,639

    Mr48chev
    ALLIANCE MEMBER

  17. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,250

    gimpyshotrods
    Member

    It has been done:
    [​IMG]
    That's 6-on-5-1/2". 5-on-5-1/2" would be much the same, less one stud.
     
  18. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,015

    Hollywood-East
    Member

    Now this is getting interesting... I have a Franklin out of a ol' drag truck that has the wide 5, What kinda loot Ya looking at to get into these hub's?
     
  19. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,250

    gimpyshotrods
    Member

    There should be enough meat in a stock hub to turn it down in a lathe, along with the axle flange, to fit a 5-on-5-1/2" wheel register hole (possibly 5-on-5"). A vertical mill with and end mill and sport facer take care of making positions for the studs.

    Socket head cap screws replace the hex bolts for the axle flange. If I remember correctly, that bolt pattern is 8-on-3.96". Let's call it 4". If 1/8" is maintained around the outside of the bolts (enough for a cap screw head), that makes the hub 4-1/4". A typical aftermarket wheel has a center bore of 108.71mm (US Wheel), which is 4.2799.

    It's machine work, and a handful of parts. Much the same can be done on the front. It is all up to what the machine shop charges.

    If enough hub is left at the original diameter to locate the drums, the can be bolted down by threading the original lug holes, and using fasteners that clear the wheels.
     
  20. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,015

    Hollywood-East
    Member

    Never thought about it like that, But I sure am going to now.... God Hate's a coward... Thanx for breaking down!
     
  21. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,015

    Hollywood-East
    Member

    Last question what rotors did you end up using? Thanx!
     
  22. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,250

    gimpyshotrods
    Member

    This is NOT mine. I didn't build it.

    I just analyzed it.
     
  23. squirrel
    Joined: Sep 23, 2004
    Posts: 43,671

    squirrel
    Member

    it looks to me like it has billet steel hubs...but maybe I'm seeing things?

    Anyways, I doubt our intrepid OP was thinking of dropping that much dough at a machine shop. I also think he probably didn't know before he got the truck, what the many differences are between a C10 and a C20.
     
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  24. Mitchell Rish
    Joined: Jun 10, 2007
    Posts: 908

    Mitchell Rish
    Member
    from Houston MS

    If I remember right that is a HO 72 rear by Hollander exchange. The HO 52 chunk will also swap in it. I did a disk break swap years ago on a 1951 one ton. Now for a possible cheaper way.
    The frankland wide five hubs will bolt on your rear stubs to the rear. I also have a set of grand national floater hubs bearings etc that are 5x5 that we’re also on that same rear end at one time.(as in the quick change that I put wide fives back on. ) Got the axle tubes also. The stubs on the housing will possibly have to be shorted and rethread the ends or get a pair that bolt on from speed way.(bolts to the original backing plate hole but figure you will have to cut the snout off. Yep you are still gonna have to get a set of double splined axles and drive plates but that part is easy to find used. Those are getting cheap now that all the new qc are so light.Squirrel is right in that it depends on how cheap your machinest works. I got the hubs and even the axle tubes if you want. I’ll damn near give them away. Shipping is gonna be a bitch. The axle tubes are about 30 long and they are steel.
    Black bird makes a disk brake bracket that works on that rear end. For the record the late 14bolt backing plate pattern is the same Because Black Bird interprisses sent me a set and said they would fit. And they did. But that was for the big 8 hole rotor. Best of luck.
    I even converted the stock 8 hole axle to disk as well but that was an I beam so that info is of no use.
     
  25. thirtytwo
    Joined: Dec 19, 2003
    Posts: 2,530

    thirtytwo
    Member

    71-72 should bolt right in and would be about 3/4” wider I believe
     
  26. squirrel
    Joined: Sep 23, 2004
    Posts: 43,671

    squirrel
    Member

    the 60-62 frame is different from the 63-72 frames. Quite different. Nothing bolts in.
     

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