Got gears?

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

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  1. 70Sabre

    Buick Rear End Info

    70Sabre, Feb 9, 2008 ... 2
    Replies:
    26
    Views:
    38,537
    PatrickSkylark
    Jan 14, 2021
  2. jmccart

    8.5 10 bolts, 71 & later Buick & Olds, Pontiac too?

    jmccart, Aug 19, 2009
    Replies:
    13
    Views:
    13,732
    otter
    Oct 27, 2011
  3. matt68gs400

    Gear ratio, wheel size, and TH400

    matt68gs400, Aug 31, 2015 ... 4 5 6
    Replies:
    106
    Views:
    9,730
    matt68gs400
    Oct 2, 2016
  4. 66rivnail

    Any opinions on National vs. Timken bearings?

    66rivnail, Apr 25, 2010
    Replies:
    4
    Views:
    8,606
    66rivnail
    Apr 26, 2010
  5. fireball

    67 GS 400 rear axle seal question

    fireball, Jun 7, 2008 ... 2
    Replies:
    25
    Views:
    8,017
    wkillgs
    Jun 27, 2008
  6. Ken Mild

    Installing gears and posi at home - 12 bolt

    Ken Mild, Feb 21, 2011
    Replies:
    17
    Views:
    7,997
    matt68gs400
    Oct 6, 2015
  7. DLG

    8.5 rear conversion for a g-body

    DLG, Apr 4, 2007
    Replies:
    10
    Views:
    7,955
    oPh
    Apr 11, 2007
  8. cellblock_g

    1985 Buick Le Sabre rear axle ratio

    cellblock_g, Nov 13, 2009 ... 2
    Replies:
    25
    Views:
    7,748
    cellblock_g
    Aug 13, 2010
  9. Conner

    POSI Options for 64' Skylark???

    Conner, Sep 22, 2009 ... 2
    Replies:
    27
    Views:
    7,238
    sd-slider
    Aug 1, 2010
  10. Sabotage_666

    auburn limited slip vs. eaton posi

    Sabotage_666, Feb 23, 2011
    Replies:
    10
    Views:
    7,212
    Sabotage_666
    Feb 23, 2011
  11. Robs455

    Ring and pinion gear pattern

    Robs455, Mar 7, 2015 ... 2
    Replies:
    27
    Views:
    7,057
    Robs455
    May 27, 2016
  12. 70aqua_custom

    Factory Buick Rear Differentials, What Were They Thinking?

    70aqua_custom, Dec 8, 2015 ... 2
    Replies:
    22
    Views:
    7,011
    monzaz
    Dec 17, 2015
  13. MartinNr5

    How do I remove my C-clips? (Posi rear end)

    MartinNr5, Apr 29, 2010
    Replies:
    12
    Views:
    6,801
    JZRIV
    May 7, 2010
  14. rack-attack

    12 bolt type 0

    rack-attack, Oct 21, 2009 ... 2
    Replies:
    25
    Views:
    6,788
    stage1 Rick
    Nov 20, 2009
  15. Pandoraskeeper

    Rear End on a '72 Buick Skylark?

    Pandoraskeeper, Apr 1, 2008
    Replies:
    5
    Views:
    6,631
    GStage1
    Apr 7, 2008
  16. GRIMM

    9", or 12 Bolt?

    GRIMM, Aug 28, 2006 ... 2
    Replies:
    35
    Views:
    6,543
    monzaz
    Mar 16, 2010
  17. monzaz

    10 bolt 68-70 posi units for the high gears 2.56 2.73 2.93

    monzaz, Dec 16, 2008 ... 2
    Replies:
    29
    Views:
    6,530
    USAMPFREAK
    May 5, 2009
  18. techg8

    Opinions on 3.08 vs 3.23 vs 3.42 rear ratios?

    techg8, Aug 23, 2008
    Replies:
    12
    Views:
    6,484
    Nothingface5384
    Aug 24, 2008
  19. mkeeler

    What rear end to use ?

    mkeeler, Feb 15, 2011 ... 2
    Replies:
    25
    Views:
    6,265
    monzaz
    May 22, 2019
  20. hobbby

    10 bolt rear end exploded!

    hobbby, Oct 9, 2014 ... 2
    Replies:
    25
    Views:
    6,205
    monzaz
    May 16, 2015
  21. landshark

    67 GS axle Bearings

    landshark, Nov 18, 2005 ... 2
    Replies:
    23
    Views:
    6,199
    diver
    Dec 9, 2005
  22. buicks

    Not enough gear

    buicks, May 1, 2015 ... 2 3 4
    Replies:
    61
    Views:
    6,150
    buicks
    Jul 16, 2015
  23. britt'sStage 1

    The Yukon Posi Unit....

    britt'sStage 1, May 25, 2007
    Replies:
    4
    Views:
    6,101
    austingta
    May 25, 2007
  24. yamaharx-1

    What is a 10 bolt worth?

    yamaharx-1, Nov 10, 2011 ... 2
    Replies:
    29
    Views:
    6,086
    Nothingface5384
    Apr 4, 2014
  25. tt455

    going from 8.5 to 8.2 ?

    tt455, Feb 7, 2007 ... 2
    Replies:
    28
    Views:
    6,075
    tt455
    Feb 13, 2007
  26. britt'sStage 1

    Weight of an 8.5" 10 Bolt Rearend

    britt'sStage 1, Dec 8, 2009
    Replies:
    5
    Views:
    6,046
    BrianTrick
    Dec 9, 2009
  27. gsx678

    POLL; What gear are you running

    gsx678, Apr 29, 2015 ... 2
    Replies:
    26
    Views:
    5,962
    j maple
    Feb 23, 2016
  28. dip815

    Posi Rear end for a 69 skylark

    dip815, Apr 26, 2006
    Replies:
    13
    Views:
    5,901
    bigtorque5
    Nov 16, 2012
  29. 68custom

    1968 rear end?

    68custom, Oct 12, 2011 ... 2
    Replies:
    22
    Views:
    5,891
    OhioGS400
    Oct 23, 2011
  30. Piston_Freddy

    What gears are everybody running with TH200-4R?

    Piston_Freddy, Sep 10, 2011 ... 2
    Replies:
    25
    Views:
    5,768
    knucklebusted
    Sep 20, 2011
  31. Eric68GS

    10 bolt from chevelle for 68 Buick GS

    Eric68GS, Jul 4, 2015 ... 2
    Replies:
    35
    Views:
    5,743
    monzaz
    Apr 3, 2016
  32. stordahl

    Wrecked diff. in '70 skylark custom, going posi!

    stordahl, May 25, 2016 ... 2 3 4
    Replies:
    71
    Views:
    5,676
    monzaz
    Aug 29, 2016
  33. Horsman

    8.5 rear end identification?

    Horsman, Aug 23, 2006
    Replies:
    17
    Views:
    5,547
    Running
    Aug 27, 2006
  34. Buick#455

    Convert a 10 bolt to Posi

    Buick#455, Aug 20, 2009
    Replies:
    11
    Views:
    5,471
    eagleguy
    Aug 27, 2009
  35. Msharkf2

    Strength of 8.5" Grand National Rear

    Msharkf2, Jan 21, 2016 ... 2
    Replies:
    21
    Views:
    5,398
    bobbybuick
    Feb 23, 2016
  36. shadewolf

    gears for highway driving and posi

    shadewolf, May 17, 2013 ... 2 3
    Replies:
    46
    Views:
    5,285
    shadewolf
    Jun 5, 2013
  37. chevick

    10 bolt rear axle id.

    chevick, Jul 23, 2009
    Replies:
    6
    Views:
    5,283
    monzaz
    Jul 25, 2009
  38. hobbby

    Highway speed vibration from rear end

    hobbby, Apr 29, 2015 ... 2 3
    Replies:
    52
    Views:
    5,273
    monzaz
    Aug 18, 2016
  39. Buick#455

    71 skylark rear end gear ratio?

    Buick#455, Jun 26, 2007
    Replies:
    9
    Views:
    5,225
    alec296
    Jul 4, 2007
  40. Torsdalen

    10 Bolt rear axle rebuild for my 70 GS455

    Torsdalen, Feb 26, 2017 ... 3 4 5
    Replies:
    97
    Views:
    5,216
    BrianTrick
    Jun 8, 2017
  41. 67blue_sky

    1967 Skylark rear end

    67blue_sky, Nov 9, 2009
    Replies:
    7
    Views:
    5,189
    monzaz
    Nov 10, 2009
  42. Rikzred68

    re -tightening pinion nut

    Rikzred68, Mar 25, 2009
    Replies:
    8
    Views:
    5,159
    Doug Ray
    Mar 31, 2009
  43. FJM568

    auburn limited slip carrier i.d.

    FJM568, Apr 11, 2009
    Replies:
    16
    Views:
    5,082
    FJM568
    Apr 20, 2009
  44. Iggycat2004

    71 GS 10 Bolt Rear axle end play - QUESTION

    Iggycat2004, Jun 11, 2009
    Replies:
    10
    Views:
    5,081
    buick64203
    Jun 14, 2009
  45. PCUB

    Differential Fluid Change?

    PCUB, Aug 20, 2015 ... 2
    Replies:
    21
    Views:
    5,063
    matt68gs400
    Sep 20, 2015
  46. jmccart

    70-72 Monte Carlo rear-same as skylark

    jmccart, Sep 7, 2005
    Replies:
    4
    Views:
    4,995
    jmccart
    Sep 9, 2005
  47. Airflow

    66 Riviera Driveshaft Rebuild

    Airflow, May 17, 2010
    Replies:
    17
    Views:
    4,944
    Lucy Fair
    May 24, 2011
  48. tinker14bs

    How to tell difference between 8.5 and 8.2 10 bolt

    tinker14bs, Apr 21, 2009
    Replies:
    12
    Views:
    4,915
    monzaz
    Apr 23, 2009
  49. haganlee

    What cruizing RPM is good for a big block???

    haganlee, Nov 30, 2010 ... 2
    Replies:
    22
    Views:
    4,803
    Gary Bohannon
    Dec 2, 2010
  50. Mike Trom

    2.93 or 3.23? What to get?

    Mike Trom, Aug 18, 2007 ... 2
    Replies:
    38
    Views:
    4,796
    BQUICK
    Sep 17, 2007
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