Got gears?

Too much gear? Not enough? Discuss all your rear end and driveshaft questions here.

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  1. 7 skylark 1

    1350 yokes & u-joints ?

    7 skylark 1, Dec 15, 2006
    Replies:
    2
    Views:
    752
    7 skylark 1
    Dec 16, 2006
  2. agetnt9

    1350 rear yoke to smaller drive shaft end

    agetnt9, Jun 13, 2018
    Replies:
    4
    Views:
    333
    agetnt9
    Jun 13, 2018
  3. Nothingface5384

    12bolt centersection welded to 10bolt housing

    Nothingface5384, Mar 18, 2011
    Replies:
    11
    Views:
    1,352
    monzaz
    Apr 10, 2011
  4. Michael Evans

    12-bolt locker unit

    Michael Evans, Apr 8, 2011
    Replies:
    6
    Views:
    838
    Michael Evans
    Apr 9, 2011
  5. Kevin.1

    12-bolt compatibility?

    Kevin.1, Feb 7, 2006
    Replies:
    1
    Views:
    526
    10sec 455
    Feb 7, 2006
  6. 69GS400s

    12-bolt Chevy Posi gear swap ???

    69GS400s, Feb 1, 2007
    Replies:
    10
    Views:
    3,451
    72GSX4ME
    Feb 2, 2007
  7. Poconobuick

    12 Detroit Locker Problem

    Poconobuick, Sep 17, 2008
    Replies:
    0
    Views:
    494
    Poconobuick
    Sep 17, 2008
  8. scubasteve455

    12 bolts install question

    scubasteve455, Apr 29, 2018
    Replies:
    12
    Views:
    631
    scubasteve455
    May 3, 2018
  9. Woodie

    12 bolt/9"...

    Woodie, Feb 12, 2007
    Replies:
    3
    Views:
    618
    Stage2Scott
    Feb 14, 2007
  10. 67RivRacer

    12 Bolt, 28 Spline?

    67RivRacer, May 25, 2008
    Replies:
    11
    Views:
    2,930
    Bad Buick
    Jun 25, 2008
  11. mk333

    12 bolt WT code?

    mk333, Aug 3, 2009
    Replies:
    2
    Views:
    506
    mk333
    Aug 3, 2009
  12. bugeater

    12 Bolt with 4.88's

    bugeater, Aug 24, 2012
    Replies:
    8
    Views:
    1,229
    gstewart
    Aug 27, 2012
  13. idahoskylark

    12 bolt w no mounts - repairable??

    idahoskylark, Jul 14, 2011
    Replies:
    12
    Views:
    2,232
    idahoskylark
    Jul 27, 2011
  14. sean Buick 76

    12 bolt vs 8.5

    sean Buick 76, Nov 9, 2021
    Replies:
    10
    Views:
    776
    monzaz
    Dec 3, 2021
  15. DelmarHD

    12 bolt versus 10 bolt driveshaft length

    DelmarHD, Apr 10, 2007
    Replies:
    1
    Views:
    1,690
    oPh
    Apr 10, 2007
  16. knucklebusted

    12 Bolt Value?

    knucklebusted, Jun 5, 2011
    Replies:
    8
    Views:
    1,441
    monzaz
    Jun 7, 2011
  17. rack-attack

    12 bolt type 0

    rack-attack, Oct 21, 2009 ... 2
    Replies:
    25
    Views:
    7,727
    stage1 Rick
    Nov 20, 2009
  18. rmstg2

    12 Bolt to 8.5 10 Bolt Swap

    rmstg2, Feb 11, 2012
    Replies:
    6
    Views:
    913
    monzaz
    Feb 13, 2012
  19. 1970 GS 4spd

    12 bolt swap into a 73 Century

    1970 GS 4spd, Oct 5, 2008
    Replies:
    6
    Views:
    516
    monzaz
    Oct 6, 2008
  20. Idaho67gs400

    12 bolt swap in 67 GS 400

    Idaho67gs400, Jan 8, 2012
    Replies:
    10
    Views:
    1,480
    wkillgs
    Jan 10, 2012
  21. agetnt9

    12 Bolt Swap

    agetnt9, Jun 17, 2011
    Replies:
    12
    Views:
    1,267
    agetnt9
    Jun 18, 2011
  22. racenu

    12 bolt swap

    racenu, Jan 3, 2007
    Replies:
    10
    Views:
    1,519
    Sportwagon400
    Jan 10, 2007
  23. stged455

    12 bolt swap

    stged455, Jun 4, 2011
    Replies:
    2
    Views:
    628
    stged455
    Jun 5, 2011
  24. stged455

    12 bolt swap

    stged455, Jun 4, 2011
    Replies:
    6
    Views:
    969
    knucklebusted
    Jun 5, 2011
  25. BillyG

    12 bolt rubber pinion snubber location?

    BillyG, Aug 13, 2007
    Replies:
    15
    Views:
    1,771
    Geoemojr
    Aug 29, 2007
  26. jmccart

    12 bolt ring/pinion inedtification help

    jmccart, Apr 20, 2006
    Replies:
    4
    Views:
    598
    jmccart
    Apr 23, 2006
  27. Chi-Town67

    12 bolt ring gear ID

    Chi-Town67, May 27, 2019
    Replies:
    2
    Views:
    591
    Chi-Town67
    May 28, 2019
  28. tlivingd

    12 bolt rebuild?

    tlivingd, Sep 29, 2004
    Replies:
    2
    Views:
    725
    TomGS72
    Sep 30, 2004
  29. Hawaii69

    12 Bolt rearend build

    Hawaii69, Feb 22, 2005
    Replies:
    5
    Views:
    824
    Hawaii69
    Feb 22, 2005
  30. gransportw

    12 bolt rear end

    gransportw, Apr 12, 2007
    Replies:
    4
    Views:
    2,415
    gransportw
    Apr 16, 2007
  31. buicfrank

    12 bolt rear axle oil seal

    buicfrank, Apr 2, 2010
    Replies:
    3
    Views:
    1,705
    buicfrank
    Apr 8, 2010
  32. sweet70beast

    12 bolt question

    sweet70beast, Jan 19, 2007
    Replies:
    1
    Views:
    1,429
    GStage1
    Jan 19, 2007
  33. sweet70beast

    12 Bolt Q's

    sweet70beast, Nov 21, 2007
    Replies:
    3
    Views:
    1,064
    Hawken
    Nov 25, 2007
  34. mikethegoon

    12 bolt preload springs R/r

    mikethegoon, Mar 8, 2021 ... 2
    Replies:
    31
    Views:
    1,652
    BrianTrick
    Apr 6, 2021
  35. Robs455

    12 Bolt posi safe or not?

    Robs455, Jan 20, 2017 ... 2
    Replies:
    24
    Views:
    2,516
    monzaz
    Jan 27, 2017
  36. Topless64-455

    12 bolt posi pinion bearing ?

    Topless64-455, Nov 14, 2004
    Replies:
    7
    Views:
    862
    Topless64-455
    Dec 17, 2004
  37. Topless64-455

    12 bolt posi is making some noise but not all the time???

    Topless64-455, Jun 24, 2013
    Replies:
    3
    Views:
    664
    Topless64-455
    Jul 3, 2013
  38. Topless64-455

    12 bolt posi housing ID help

    Topless64-455, Nov 9, 2004
    Replies:
    9
    Views:
    1,186
    70GSXFAN
    Dec 1, 2008
  39. GSDrew

    12 bolt posi help

    GSDrew, Feb 21, 2009
    Replies:
    7
    Views:
    1,796
    GSDrew
    Feb 25, 2009
  40. gsgeorge3

    12 bolt posi from my 69 g.s.400

    gsgeorge3, Oct 22, 2018 ... 2
    Replies:
    22
    Views:
    1,297
    monzaz
    Oct 28, 2018
  41. fatboybuick

    12 bolt posi from a pick up

    fatboybuick, Aug 27, 2008
    Replies:
    4
    Views:
    780
    fatboybuick
    Aug 27, 2008
  42. Tom Miller

    12 bolt posi 3 series carrier with 33 spline side gears

    Tom Miller, Sep 27, 2015
    Replies:
    12
    Views:
    1,475
    Tom Miller
    Oct 3, 2015
  43. Bad Buick

    12 Bolt pinion yoke?

    Bad Buick, Mar 24, 2011
    Replies:
    5
    Views:
    1,325
    kenm455
    Mar 25, 2011
  44. Brent

    12 Bolt Pinion Seal Question

    Brent, Jan 20, 2023
    Replies:
    3
    Views:
    327
    Brent
    Jan 20, 2023
  45. SS/GN

    12 Bolt pinion seal leaks

    SS/GN, May 20, 2021
    Replies:
    15
    Views:
    386
    SS/GN
    Jun 1, 2021
  46. Bad Buick

    12 bolt pattern

    Bad Buick, Apr 2, 2011
    Replies:
    7
    Views:
    1,429
    monzaz
    Apr 11, 2011
  47. wazzy3

    12 Bolt Open Conversion

    wazzy3, Dec 13, 2011
    Replies:
    2
    Views:
    921
    monzaz
    Dec 14, 2011
  48. Steve Craig

    12 bolt Olds Rear Question

    Steve Craig, Oct 8, 2004
    Replies:
    11
    Views:
    1,602
    quicksabre
    Oct 29, 2004
  49. 67fitz

    12 bolt in skylark ?

    67fitz, Feb 2, 2007
    Replies:
    7
    Views:
    1,397
    bobc455
    Feb 5, 2007
  50. Lemans1

    12 bolt in my 67 Sportwagon....what posi fits it??

    Lemans1, Jul 21, 2012
    Replies:
    10
    Views:
    1,320
    monzaz
    Jul 24, 2012
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