Got gears?

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

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  1. Sabotage_666

    Western PA. Where can I find a 12 bolt?

    Sabotage_666, Dec 21, 2010 ... 2
    Replies:
    28
    Views:
    2,332
    LKBUMM
    Dec 23, 2010
  2. SteeveeDee

    Differential Question

    SteeveeDee, Jun 24, 2014
    Replies:
    9
    Views:
    2,302
    Mr. Sunset
    May 8, 2015
  3. afracer

    8.5 10 bolt axle vent?

    afracer, May 13, 2015
    Replies:
    8
    Views:
    2,295
    BrianTrick
    May 13, 2015
  4. Bygblok

    chevelle/skylark rearend width difference?

    Bygblok, May 4, 2020 ... 2
    Replies:
    20
    Views:
    2,290
    MKdefender
    Dec 18, 2023
  5. e_normus

    help identifying rear ends please

    e_normus, Jun 3, 2009
    Replies:
    16
    Views:
    2,287
    e_normus
    Jun 9, 2009
  6. cpk 71

    Identifying what make of 12 bolt

    cpk 71, Apr 17, 2005
    Replies:
    6
    Views:
    2,284
    cpk 71
    Apr 19, 2005
  7. whelanmj

    need bolt in axle for 8.5 rear

    whelanmj, Aug 26, 2008
    Replies:
    6
    Views:
    2,280
    whelanmj
    Aug 29, 2008
  8. amermuscle

    rear axle identification

    amermuscle, Sep 21, 2011
    Replies:
    5
    Views:
    2,261
    amermuscle
    Sep 22, 2011
  9. matt68gs400

    68 Buick GS 400 posi conversion

    matt68gs400, Jul 14, 2015
    Replies:
    14
    Views:
    2,251
    matt68gs400
    Jul 28, 2015
  10. wagonman65

    10 bolt buick rear help please

    wagonman65, Mar 4, 2008
    Replies:
    7
    Views:
    2,243
    wagonman65
    Mar 4, 2008
  11. gs_jimmy

    Can I run 3.73 or 4.10 gears?

    gs_jimmy, Jul 29, 2011
    Replies:
    10
    Views:
    2,236
    knucklebusted
    Jul 30, 2011
  12. idahoskylark

    12 bolt w no mounts - repairable??

    idahoskylark, Jul 14, 2011
    Replies:
    12
    Views:
    2,235
    idahoskylark
    Jul 27, 2011
  13. yamaharx-1

    Factory 12 bolt code

    yamaharx-1, Jan 12, 2012
    Replies:
    12
    Views:
    2,233
    monzaz
    Jan 14, 2012
  14. jamiesonlesabre

    rear ends.

    jamiesonlesabre, Apr 12, 2014
    Replies:
    17
    Views:
    2,215
    sean Buick 76
    Apr 27, 2014
  15. Buickboy8

    8.2 BOP posi carrier for sale and wanted

    Buickboy8, Dec 7, 2006
    Replies:
    4
    Views:
    2,206
    65skyHT
    Dec 17, 2006
  16. Skylark350

    Pinion shaft size?

    Skylark350, Apr 24, 2007
    Replies:
    17
    Views:
    2,200
    sharkmonkey
    May 6, 2007
  17. 12lives

    What oil to use in posi rear end???

    12lives, Oct 16, 2010
    Replies:
    4
    Views:
    2,189
    monzaz
    Oct 17, 2010
  18. lark69

    71 riviera 12 bolt posi?

    lark69, Dec 31, 2005
    Replies:
    12
    Views:
    2,188
    kia
    Jan 5, 2006
  19. Roadmaster49

    Aluminum DriveShafts

    Roadmaster49, Jul 10, 2011
    Replies:
    10
    Views:
    2,186
    sriley531
    Jul 13, 2011
  20. buickapollo455

    7.5 GM rear, gears need change , advise please

    buickapollo455, Dec 5, 2011 ... 2
    Replies:
    21
    Views:
    2,183
    monzaz
    Dec 8, 2011
  21. jcamp116

    Difference Between BOP 3.23 Ring and Pinion?

    jcamp116, Nov 16, 2006
    Replies:
    1
    Views:
    2,181
    oPh
    Nov 16, 2006
  22. 1965skygs

    rear end question for 65 skylark gran sport

    1965skygs, May 1, 2015
    Replies:
    13
    Views:
    2,179
    GS Jim
    May 7, 2015
  23. gsx678

    Drive shaft length

    gsx678, Jun 7, 2013
    Replies:
    8
    Views:
    2,176
    sean Buick 76
    Jun 24, 2013
  24. Groucho70

    Rear end identification help

    Groucho70, Oct 5, 2017
    Replies:
    13
    Views:
    2,174
    monzaz
    Oct 10, 2017
  25. buickapollo455

    Interchange Rear Ends X-body

    buickapollo455, Jan 9, 2005
    Replies:
    7
    Views:
    2,174
    GStage1
    Jan 13, 2005
  26. Gtivalencia34

    What modern rear end is comprable to my 72 Skylark ( I need help plz)

    Gtivalencia34, Jun 9, 2019 ... 2
    Replies:
    31
    Views:
    2,165
    12lives
    Jun 12, 2019
  27. Chuck George

    Will it fit?

    Chuck George, Jan 16, 2021 ... 2
    Replies:
    22
    Views:
    2,164
    LARRY70GS
    Apr 20, 2021
  28. musclehead

    Ring gear 1234477 how do I tell if it`s limited slip

    musclehead, Jun 17, 2008
    Replies:
    7
    Views:
    2,149
    DaWildcat
    Jun 18, 2008
  29. hallja

    Help identify rear end ratio

    hallja, Mar 15, 2015
    Replies:
    11
    Views:
    2,143
    monzaz
    Apr 4, 2015
  30. Atbb

    Driveshaft question

    Atbb, Jan 18, 2011 ... 2
    Replies:
    25
    Views:
    2,135
    Atbb
    Sep 21, 2012
  31. Easy Rider

    '76 Estate Wagon axle shafts

    Easy Rider, Mar 6, 2012
    Replies:
    15
    Views:
    2,135
    monzaz
    Apr 19, 2012
  32. Canadian GS 350

    1972 8.5 inch axles?

    Canadian GS 350, Jan 25, 2019 ... 2
    Replies:
    24
    Views:
    2,134
    Canadian GS 350
    Apr 27, 2019
  33. Brent

    72 Chevelle 12 bolt value?

    Brent, Feb 13, 2022
    Replies:
    14
    Views:
    2,129
    monzaz
    Apr 11, 2022
  34. Ryanjbill15

    Beam torque wrench question for pinion preload

    Ryanjbill15, Jul 7, 2018 ... 2
    Replies:
    20
    Views:
    2,123
    TexasT
    Oct 14, 2018
  35. cole d

    Posi rear from 72 Cutlass S

    cole d, Feb 1, 2008
    Replies:
    3
    Views:
    2,117
    Sturmgewehr
    Feb 2, 2008
  36. greg_moreira

    rear end swap into 66 skylark

    greg_moreira, Mar 26, 2005
    Replies:
    11
    Views:
    2,112
    oPh
    Mar 31, 2005
  37. cstanley-gs

    Learned today I have a posi - I had regular gear oil in there!

    cstanley-gs, Apr 5, 2007
    Replies:
    13
    Views:
    2,098
    cstanley-gs
    Apr 22, 2007
  38. riv1964

    Side Gears for 64 Rivi posi unit

    riv1964, Nov 11, 2007
    Replies:
    7
    Views:
    2,097
    thepartsman
    Jun 22, 2012
  39. GRIMM

    Stock buick rear strong?

    GRIMM, May 10, 2006 ... 2
    Replies:
    20
    Views:
    2,087
    GRIMM
    Jun 2, 2006
  40. Stagedcoach71

    3.42 or 3.73 gearrs for street? Last call before I order

    Stagedcoach71, Oct 27, 2016
    Replies:
    10
    Views:
    2,078
    Bigpig455
    Oct 28, 2016
  41. Iceman8.6

    72 Sport Wagon Rear?

    Iceman8.6, Dec 13, 2005
    Replies:
    14
    Views:
    2,077
    GStage1
    Dec 16, 2005
  42. bluedave9

    Axle size

    bluedave9, Feb 16, 2010
    Replies:
    14
    Views:
    2,076
    monzaz
    Feb 16, 2010
  43. monkeyy337

    Canadian 12 Bolt?

    monkeyy337, Jan 18, 2007
    Replies:
    2
    Views:
    2,070
    monkeyy337
    Jan 18, 2007
  44. gs430

    Ring and pinion setup advice

    gs430, Oct 5, 2019 ... 2
    Replies:
    37
    Views:
    2,069
    BrianTrick
    Sep 18, 2020
  45. henry

    10 bolt posi

    henry, Apr 30, 2008
    Replies:
    4
    Views:
    2,068
    henry
    May 6, 2008
  46. Sabotage_666

    so it begins! my first rear end rebuild

    Sabotage_666, Apr 19, 2011
    Replies:
    10
    Views:
    2,067
    Sabotage_666
    Apr 22, 2011
  47. wakewil

    rear end newb.

    wakewil, Dec 11, 2009 ... 2
    Replies:
    28
    Views:
    2,065
    BWINN519
    Dec 24, 2009
  48. sparkplug

    is this a posi??? looks weird

    sparkplug, May 9, 2015
    Replies:
    14
    Views:
    2,064
    woodchuck2
    May 15, 2015
  49. markymark

    rear diff help

    markymark, Mar 20, 2008
    Replies:
    17
    Views:
    2,063
    markymark
    Mar 22, 2008
  50. S2X01

    Riviera Rear Swap

    S2X01, Jan 6, 2015
    Replies:
    13
    Views:
    2,063
    monzaz
    Feb 18, 2015
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