72 Skylark 10 Bolt Converting to 86 Regal

Discussion in 'Got gears?' started by ronbz455, Jun 9, 2014.

  1. ronbz455

    ronbz455 Big Butz Racing

    I will check with Bill Carter here in Indy and see what he wants.
     
  2. ronbz455

    ronbz455 Big Butz Racing

    Bill said $30 just to weld the tubes but 250 total with parts narrowed to any size, weld on Ford ends with gm bolt pattern. He said I do it all the time for G bodies! He said yes 30 spline.
     
  3. ronbz455

    ronbz455 Big Butz Racing

    Well there it is out of the car and on the stands ready for teardown!
     

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  4. ronbz455

    ronbz455 Big Butz Racing

    So you have to use a slide hammer to get the axles out?
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    You can use an old drum. Reverse it around and thread a few lug nuts on, then use it like a slap hammer. It can be tough sometimes, but they will come out.
     
  6. ronbz455

    ronbz455 Big Butz Racing

    Got um! I have an old slide hammer from work with a broken handle and a 2 hole mount. Only had the adaptor on with a couple of threads but they came right out. Its got 16 and 41 teeth which is 2.56.
     
  7. ronbz455

    ronbz455 Big Butz Racing

    28 spline.
     

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  8. newmexguy

    newmexguy Well-Known Member

    8.5 "corporate" differential unit was phased in beginning in 71 model year. 8.5 in has a more "round" cover than 8.2 in , and has "ears" in bottom of center section casting at aprox 7 and 5 oclock, looking at unit from behind.
     
  9. ronbz455

    ronbz455 Big Butz Racing

    Should I have this axle dipped at the strip shop or just blast it and clean the inside with rags and race gas or solvent?

    When I measure the ring gear it measures less than 8.50 from tooth to tooth.
     

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  10. ronbz455

    ronbz455 Big Butz Racing

    Did a Gunk clean and some deburring on it. Next step some welds on the tubes.
     

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  11. cpk 71

    cpk 71 im just a number

    Just saw this,I have a buddy with a G body rear in a 71 skylark ,might be looking for a sale or trade .I can ask if you want more info! Lemme know
     
  12. ronbz455

    ronbz455 Big Butz Racing

    Is it an 8.5?
     
  13. cpk 71

    cpk 71 im just a number

    Gonna talk to him tonight , but he did say its a 4:10 mini spool.
     
  14. ronbz455

    ronbz455 Big Butz Racing

    I pmed that guy back with what I had and no reply so I'm getting ready to stich weld on top first. On a Millermatic 210 what level of power, 1-7 and what wire speed with .030 wire? Also what motion works best here. C, Figure 8, push pull, pull push or other.
     

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  15. hugger

    hugger Well-Known Member

    I would advise against welding the tubes without a thru bar in place or at least the ends and center held down , I know the tubes are thick on these rears but IF it does pull and not return its gonna cause all sorts of issues. But you want the heat on high and speed as fast as possible without kicking back obviously, and I roll it side to side with emphasis on the cast iron
     
  16. ronbz455

    ronbz455 Big Butz Racing

    Too late already done. I stitched 1-2" at a time, letting it cool, going 180 around and stitching 1-2" from side to side letting it cool each time. It looks straight looking through it but will put a straight edge in there to see if I can tell if it's crooked.
     

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  17. ronbz455

    ronbz455 Big Butz Racing

    I guess I could put the carrier and axles in and see how it freely it spins.
     
  18. hugger

    hugger Well-Known Member

    The older GM rears have crazy thick tubes an engage pretty deep in the center section so more than likely its fine, do that to a 8.8,7.5, or late model 8.5 and
    They WILL pull around on you
     
  19. ronbz455

    ronbz455 Big Butz Racing

    Ok I would like to get this thing together cheap for now just to get it in the car. I don't have enough power to hurt it right now and will change it later when that happens.
    Does anyone have a posi carrier and a 3.73 gear to put in this with 28 spline axles? Or a 30 spline carrier and axles with stock axle bearings?
     
  20. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    Just out of stupid curiousity, I wonder how JB welding the axle tubes would do :laugh:
     

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