Got gears?

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

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  1. Brett Slater
    Sticky

    Wheelhop Remedies - F41 Suspension

    Brett Slater, Apr 15, 2017 ... 5 6 7
    Replies:
    128
    Views:
    7,301
    Guy Parquette
    Oct 8, 2023
  2. 70Sabre

    Buick Rear End Info

    70Sabre, Feb 9, 2008 ... 2
    Replies:
    26
    Views:
    45,502
    PatrickSkylark
    Jan 14, 2021
  3. jmccart

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

    jmccart, Aug 19, 2009 ... 2
    Replies:
    33
    Views:
    17,482
    Bens99gtp
    Jul 7, 2021
  4. matt68gs400

    Gear ratio, wheel size, and TH400

    matt68gs400, Aug 31, 2015 ... 4 5 6
    Replies:
    106
    Views:
    13,224
    matt68gs400
    Oct 2, 2016
  5. 70aqua_custom

    Factory Buick Rear Differentials, What Were They Thinking?

    70aqua_custom, Dec 8, 2015 ... 2
    Replies:
    22
    Views:
    11,676
    monzaz
    Dec 17, 2015
  6. 66rivnail

    Any opinions on National vs. Timken bearings?

    66rivnail, Apr 25, 2010
    Replies:
    4
    Views:
    10,806
    66rivnail
    Apr 26, 2010
  7. cellblock_g

    1985 Buick Le Sabre rear axle ratio

    cellblock_g, Nov 13, 2009 ... 2
    Replies:
    25
    Views:
    9,386
    cellblock_g
    Aug 13, 2010
  8. fireball

    67 GS 400 rear axle seal question

    fireball, Jun 7, 2008 ... 2
    Replies:
    25
    Views:
    8,776
    wkillgs
    Jun 27, 2008
  9. Horsman

    8.5 rear end identification?

    Horsman, Aug 23, 2006
    Replies:
    17
    Views:
    8,759
    Running
    Aug 27, 2006
  10. Conner

    POSI Options for 64' Skylark???

    Conner, Sep 22, 2009 ... 2
    Replies:
    27
    Views:
    8,489
    sd-slider
    Aug 1, 2010
  11. DLG

    8.5 rear conversion for a g-body

    DLG, Apr 4, 2007
    Replies:
    10
    Views:
    8,444
    oPh
    Apr 11, 2007
  12. Ken Mild

    Installing gears and posi at home - 12 bolt

    Ken Mild, Feb 21, 2011
    Replies:
    17
    Views:
    8,420
    matt68gs400
    Oct 6, 2015
  13. Robs455

    Ring and pinion gear pattern

    Robs455, Mar 7, 2015 ... 2
    Replies:
    27
    Views:
    8,327
    Robs455
    May 27, 2016
  14. Msharkf2

    Strength of 8.5" Grand National Rear

    Msharkf2, Jan 21, 2016 ... 2
    Replies:
    21
    Views:
    8,057
    bobbybuick
    Feb 23, 2016
  15. Sabotage_666

    auburn limited slip vs. eaton posi

    Sabotage_666, Feb 23, 2011
    Replies:
    10
    Views:
    7,908
    Sabotage_666
    Feb 23, 2011
  16. rack-attack

    12 bolt type 0

    rack-attack, Oct 21, 2009 ... 2
    Replies:
    25
    Views:
    7,744
    stage1 Rick
    Nov 20, 2009
  17. 68custom

    1968 rear end?

    68custom, Oct 12, 2011 ... 2
    Replies:
    22
    Views:
    7,737
    OhioGS400
    Oct 23, 2011
  18. mkeeler

    What rear end to use ?

    mkeeler, Feb 15, 2011 ... 2
    Replies:
    25
    Views:
    7,724
    monzaz
    May 22, 2019
  19. 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:
    7,480
    USAMPFREAK
    May 5, 2009
  20. buicks

    Not enough gear

    buicks, May 1, 2015 ... 2 3 4
    Replies:
    61
    Views:
    7,440
    buicks
    Jul 16, 2015
  21. Pandoraskeeper

    Rear End on a '72 Buick Skylark?

    Pandoraskeeper, Apr 1, 2008
    Replies:
    5
    Views:
    7,389
    GStage1
    Apr 7, 2008
  22. MartinNr5

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

    MartinNr5, Apr 29, 2010
    Replies:
    12
    Views:
    7,316
    JZRIV
    May 7, 2010
  23. techg8

    Opinions on 3.08 vs 3.23 vs 3.42 rear ratios?

    techg8, Aug 23, 2008
    Replies:
    12
    Views:
    7,283
    Nothingface5384
    Aug 24, 2008
  24. landshark

    67 GS axle Bearings

    landshark, Nov 18, 2005 ... 2
    Replies:
    23
    Views:
    7,120
    diver
    Dec 9, 2005
  25. Christopher Spouse Drew

    Finding a 10 bolt 8.5 posi In salvage yards

    Christopher Spouse Drew, Dec 15, 2018 ... 2 3
    Replies:
    56
    Views:
    6,929
    BrianTrick
    Jan 30, 2019
  26. afracer

    Help identify this rear end! 12 bolt

    afracer, Jun 4, 2016 ... 2
    Replies:
    29
    Views:
    6,833
    monzaz
    Jun 9, 2016
  27. GRIMM

    9", or 12 Bolt?

    GRIMM, Aug 28, 2006 ... 2
    Replies:
    35
    Views:
    6,820
    monzaz
    Mar 16, 2010
  28. PCUB

    Differential Fluid Change?

    PCUB, Aug 20, 2015 ... 2
    Replies:
    21
    Views:
    6,816
    matt68gs400
    Sep 20, 2015
  29. hobbby

    10 bolt rear end exploded!

    hobbby, Oct 9, 2014 ... 2
    Replies:
    25
    Views:
    6,757
    monzaz
    May 16, 2015
  30. tt455

    going from 8.5 to 8.2 ?

    tt455, Feb 7, 2007 ... 2
    Replies:
    28
    Views:
    6,735
    tt455
    Feb 13, 2007
  31. stordahl

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

    stordahl, May 25, 2016 ... 2 3 4
    Replies:
    71
    Views:
    6,685
    monzaz
    Aug 29, 2016
  32. Torsdalen

    10 Bolt rear axle rebuild for my 70 GS455

    Torsdalen, Feb 26, 2017 ... 3 4 5
    Replies:
    97
    Views:
    6,659
    BrianTrick
    Jun 8, 2017
  33. Piston_Freddy

    What gears are everybody running with TH200-4R?

    Piston_Freddy, Sep 10, 2011 ... 2
    Replies:
    25
    Views:
    6,648
    knucklebusted
    Sep 20, 2011
  34. MarcoD

    66 Wildcat - 9-3/8" rear end

    MarcoD, Jan 1, 2018 ... 2 3
    Replies:
    41
    Views:
    6,613
    Wild_Cat
    Aug 17, 2021
  35. yamaharx-1

    What is a 10 bolt worth?

    yamaharx-1, Nov 10, 2011 ... 2
    Replies:
    29
    Views:
    6,523
    Nothingface5384
    Apr 4, 2014
  36. Ryanjbill15

    New gears and posi noise on tight turns

    Ryanjbill15, Jul 15, 2018 ... 2
    Replies:
    27
    Views:
    6,452
    UPSTAGED1970
    Jul 18, 2018
  37. haganlee

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

    haganlee, Nov 30, 2010 ... 2
    Replies:
    22
    Views:
    6,415
    Gary Bohannon
    Dec 2, 2010
  38. 67blue_sky

    1967 Skylark rear end

    67blue_sky, Nov 9, 2009
    Replies:
    7
    Views:
    6,410
    monzaz
    Nov 10, 2009
  39. dip815

    Posi Rear end for a 69 skylark

    dip815, Apr 26, 2006
    Replies:
    13
    Views:
    6,393
    bigtorque5
    Nov 16, 2012
  40. Mike Trom

    2.93 or 3.23? What to get?

    Mike Trom, Aug 18, 2007 ... 2
    Replies:
    38
    Views:
    6,373
    BQUICK
    Sep 17, 2007
  41. scubasteve455

    Getting ready to install 12 bolt

    scubasteve455, May 23, 2018 ... 6 7 8
    Replies:
    141
    Views:
    6,295
    monzaz
    Sep 3, 2018
  42. gsx678

    POLL; What gear are you running

    gsx678, Apr 29, 2015 ... 2
    Replies:
    26
    Views:
    6,237
    j maple
    Feb 23, 2016
  43. britt'sStage 1

    Weight of an 8.5" 10 Bolt Rearend

    britt'sStage 1, Dec 8, 2009
    Replies:
    5
    Views:
    6,221
    BrianTrick
    Dec 9, 2009
  44. britt'sStage 1

    The Yukon Posi Unit....

    britt'sStage 1, May 25, 2007
    Replies:
    4
    Views:
    6,201
    austingta
    May 25, 2007
  45. Airtight1975

    1972 Buick Riviera Rear Axle

    Airtight1975, Feb 6, 2017 ... 2
    Replies:
    31
    Views:
    6,176
    monzaz
    May 15, 2024 at 8:06 AM
  46. tinker14bs

    How to tell difference between 8.5 and 8.2 10 bolt

    tinker14bs, Apr 21, 2009
    Replies:
    12
    Views:
    6,085
    monzaz
    Apr 23, 2009
  47. Eric68GS

    10 bolt from chevelle for 68 Buick GS

    Eric68GS, Jul 4, 2015 ... 2
    Replies:
    35
    Views:
    6,084
    monzaz
    Apr 3, 2016
  48. FJM568

    auburn limited slip carrier i.d.

    FJM568, Apr 11, 2009
    Replies:
    16
    Views:
    6,059
    FJM568
    Apr 20, 2009
  49. shadewolf

    gears for highway driving and posi

    shadewolf, May 17, 2013 ... 2 3
    Replies:
    46
    Views:
    5,957
    shadewolf
    Jun 5, 2013
  50. hobbby

    Highway speed vibration from rear end

    hobbby, Apr 29, 2015 ... 2 3
    Replies:
    52
    Views:
    5,913
    monzaz
    Aug 18, 2016
  51. Gary Farmer

    GM 7.5 -is it worth it?

    Gary Farmer, Mar 11, 2013 ... 2
    Replies:
    22
    Views:
    5,900
    nekkidhillbilly
    Mar 13, 2013
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