1970 10 Bolt Posi clutch kits?

Discussion in 'Got gears?' started by BuickGSX455, May 19, 2011.

  1. BuickGSX455

    BuickGSX455 Well-Known Member

    Got a small issue with my 10 Bolt posi in that it is often spinning up only one wheel.
    I suspect the clutches are worn.
    Does anyone do a clutch kit for these?
    If so who/where?

    Any advice welcomed.
     
  2. techg8

    techg8 The BS GS

    1970 was an 8.2" rear - cone style posi. Needs machining to recondition that posi unit.
     
  3. RACEBUICKS

    RACEBUICKS Midwest Buick Mafia


    ANd shim the springs to make it stronger too
     
  4. monzaz

    monzaz Jim

    Yep, Cone type unit if it is a ORIGINAL factory unit. The cone and or cones would need to be machined and the carrier spider gears checked for clearance and wear issue, reshimmed and assembled and bench checked.

    We do this and are completing one right now from a Pontiac. 1966 Lemans

    PM for pricing. What ratio do you have.

    Other options are to just replace the complete posi unit .

    I have provided trouble areas your cone type unit will have. ALL red arrows show trouble area in this units WHICH has them ALL!!! LOL. Spider gears ate up the pinion spider shaft almost welding them together. The cones are BOTH bottomed out in the case Tower. So this one will be expensive to recondition as it needs parts which are obsolete and will need to be match with other good used spiders on the market or on the parts shelf.

    Take care, Jim
    J D
     

    Attached Files:

  5. BuickGSX455

    BuickGSX455 Well-Known Member

    Thanks for the info Guys,

    Jim, I would love to send it to you for repairs but I am a little too far away for that to be practical.
    I can deal with worn shafts and other obvious mechanical issues but how do you deal with cones bottoming out on the case tower? What sort of machining is required?

    Is it possible that the pre-load springs are a little slack?


    How much spring shimming is advisable?

    Thanks again.
     
    Last edited: May 19, 2011
  6. monzaz

    monzaz Jim

    WILL NOT MATTER HOW MUCH YOU preload the springs. Your cones are bottomed out. IT is hitting the tower at the bottom of the case. You can put ton of pressure and all you will do is burn metal and weld your spiders together.

    PM me and we might be able to call or you call us...?? Jim

    Will need email access too for pictures.
     
  7. BuickGSX455

    BuickGSX455 Well-Known Member

  8. James McD

    James McD Well-Known Member

    Not too high jack, but..... is a 1969 the same cone style rear end? Mine just started to spin the right side more since I put on the drag radials.
     
  9. RACEBUICKS

    RACEBUICKS Midwest Buick Mafia

    Yes Same Style
     
  10. James McD

    James McD Well-Known Member

    Crap! I better pop my cover off to see what is happening in there. I had it off 6,000 miles ago, and everything looked nifty then.

    Thanks for the info,

    James
     

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