Got gears?

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

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  1. EveeSTi

    How crazy are 4.56 for street driving?

    EveeSTi, Oct 25, 2007 ... 2
    Replies:
    23
    Views:
    1,883
    mltdwn12
    Nov 3, 2007
  2. 19Skylark68 455

    y all the 10 bolts?

    19Skylark68 455, Jan 27, 2007 ... 2
    Replies:
    23
    Views:
    2,574
    oPh
    Feb 12, 2007
  3. landshark

    67 GS axle Bearings

    landshark, Nov 18, 2005 ... 2
    Replies:
    23
    Views:
    7,094
    diver
    Dec 9, 2005
  4. BuickGS65

    '66 Chevlle 10 bolt into '65 Skylark -- gears?

    BuickGS65, Sep 18, 2004 ... 2
    Replies:
    23
    Views:
    4,365
    BuickGS65
    Mar 27, 2005
  5. 70gsrick

    Need help with powertrax

    70gsrick, Jan 8, 2005 ... 2
    Replies:
    23
    Views:
    1,763
    70gsrick
    Mar 11, 2005
  6. jimmy

    Setting up 9" rear, is this the correct wear pattern?

    jimmy, Jan 1, 2005 ... 2
    Replies:
    23
    Views:
    2,022
    jimmy
    Jan 21, 2005
  7. V6sleeper

    71 8.5 rebuild

    V6sleeper, Jun 13, 2023 ... 2
    Replies:
    22
    Views:
    933
    LARRY70GS
    Nov 6, 2023
  8. bignastyGS

    Big tire guys what gear ratio are you running?

    bignastyGS, Jan 14, 2021 ... 2
    Replies:
    22
    Views:
    1,683
    sean Buick 76
    Jul 25, 2022
  9. Chuck George

    Will it fit?

    Chuck George, Jan 16, 2021 ... 2
    Replies:
    22
    Views:
    2,102
    LARRY70GS
    Apr 20, 2021
  10. OldDrummer55

    1972 Riviera Rear End

    OldDrummer55, Dec 16, 2020 ... 2
    Replies:
    22
    Views:
    1,629
    Luxus
    Feb 12, 2021
  11. BubbaJ

    slip n slide

    BubbaJ, Mar 8, 2020 ... 2
    Replies:
    22
    Views:
    1,595
    kingdaddycreel
    Jul 3, 2020
  12. Jukka Haapanen

    67 riviera 3.07 posi

    Jukka Haapanen, Jun 10, 2020 ... 2
    Replies:
    22
    Views:
    1,010
    Lucy Fair
    Jun 25, 2020
  13. gsgeorge3

    12 bolt posi from my 69 g.s.400

    gsgeorge3, Oct 22, 2018 ... 2
    Replies:
    22
    Views:
    1,283
    monzaz
    Oct 28, 2018
  14. gsjake

    did a 75 riv come with a 9 3/8 rear?

    gsjake, May 16, 2012 ... 2
    Replies:
    22
    Views:
    4,607
    limited_driver
    Jun 16, 2016
  15. Smartin

    Stock 70 Skylark 2.73 8.2 rear - what options for gear upgrades do I have?

    Smartin, May 22, 2016 ... 2
    Replies:
    22
    Views:
    1,726
    bignastyGS
    May 28, 2016
  16. Gulfgears

    Narrowing a 8.5" rear

    Gulfgears, Mar 7, 2016 ... 2
    Replies:
    22
    Views:
    2,324
    BrianTrick
    Mar 13, 2016
  17. 70aqua_custom

    Factory Buick Rear Differentials, What Were They Thinking?

    70aqua_custom, Dec 8, 2015 ... 2
    Replies:
    22
    Views:
    11,549
    monzaz
    Dec 17, 2015
  18. Gary Farmer

    GM 7.5 -is it worth it?

    Gary Farmer, Mar 11, 2013 ... 2
    Replies:
    22
    Views:
    5,853
    nekkidhillbilly
    Mar 13, 2013
  19. buicks

    What are my options? I have a 2.56 rearend.

    buicks, Oct 8, 2012 ... 2
    Replies:
    22
    Views:
    2,511
    LARRY70GS
    Oct 12, 2012
  20. DauntlessV8

    3.42 or 3.73

    DauntlessV8, Feb 8, 2012 ... 2
    Replies:
    22
    Views:
    3,935
    sriley531
    Feb 22, 2012
  21. 68custom

    1968 rear end?

    68custom, Oct 12, 2011 ... 2
    Replies:
    22
    Views:
    7,628
    OhioGS400
    Oct 23, 2011
  22. haganlee

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

    haganlee, Nov 30, 2010 ... 2
    Replies:
    22
    Views:
    6,342
    Gary Bohannon
    Dec 2, 2010
  23. buicklesabre

    Rebuild 8.2 in 68 LeSabre

    buicklesabre, Feb 23, 2010 ... 2
    Replies:
    22
    Views:
    2,422
    buicklesabre
    Mar 22, 2010
  24. eagleguy

    Switching gear ratio / going to posi?

    eagleguy, Jan 18, 2010 ... 2
    Replies:
    22
    Views:
    2,648
    eagleguy
    Jan 23, 2010
  25. bobc455

    Weird rear wheel movement

    bobc455, Apr 15, 2009 ... 2
    Replies:
    22
    Views:
    2,385
    deekster_caddy
    May 3, 2009
  26. Redmanf1

    8.2 Rearend

    Redmanf1, Jan 30, 2024 ... 2
    Replies:
    21
    Views:
    714
    monzaz
    Feb 13, 2024
  27. JayZee88

    Bolt in rear end swap for 70 Electra?

    JayZee88, Jan 20, 2017 ... 2
    Replies:
    21
    Views:
    3,806
    LARRY70GS
    Nov 6, 2023
  28. 69gs400 conv

    Can anyone id this axle?

    69gs400 conv, Apr 13, 2021 ... 2
    Replies:
    21
    Views:
    1,615
    LARRY70GS
    Apr 20, 2021
  29. jmos4

    Moser 12 bolt or 9" Ford?

    jmos4, Mar 9, 2021 ... 2
    Replies:
    21
    Views:
    766
    Bygblok
    Mar 11, 2021
  30. gnx423

    Ring gear pattern advice

    gnx423, Aug 28, 2020 ... 2
    Replies:
    21
    Views:
    777
    monzaz
    Sep 2, 2020
  31. Dr. Evil

    71 8.5 rear worth $250?

    Dr. Evil, Oct 28, 2018 ... 2
    Replies:
    21
    Views:
    1,349
    monzaz
    Dec 3, 2018
  32. BrianTrick

    Nice Rear!

    BrianTrick, May 2, 2018 ... 2
    Replies:
    21
    Views:
    1,255
    Mark Demko
    May 5, 2018
  33. racerxjj67

    Informative B.O.P 8.2 article

    racerxjj67, Jun 16, 2017 ... 2
    Replies:
    21
    Views:
    4,134
    BrianTrick
    Jun 24, 2017
  34. Nez77

    Buick 8.5 Rear With Bolt In Axels, Where are the Keepers???

    Nez77, Mar 15, 2017 ... 2
    Replies:
    21
    Views:
    1,709
    TexasT
    Apr 5, 2017
  35. Carcrazy

    Limited Slip Additive

    Carcrazy, Mar 14, 2017 ... 2
    Replies:
    21
    Views:
    1,979
    monzaz
    Mar 18, 2017
  36. Msharkf2

    Strength of 8.5" Grand National Rear

    Msharkf2, Jan 21, 2016 ... 2
    Replies:
    21
    Views:
    7,988
    bobbybuick
    Feb 23, 2016
  37. PCUB

    Differential Fluid Change?

    PCUB, Aug 20, 2015 ... 2
    Replies:
    21
    Views:
    6,753
    matt68gs400
    Sep 20, 2015
  38. BellGS

    Currie Rear Ends

    BellGS, Dec 6, 2014 ... 2
    Replies:
    21
    Views:
    4,165
    monzaz
    Jan 31, 2015
  39. buickapollo455

    7.5 GM rear, gears need change , advise please

    buickapollo455, Dec 5, 2011 ... 2
    Replies:
    21
    Views:
    2,161
    monzaz
    Dec 8, 2011
  40. eagleguy

    Best all around gear ratio, street and hwy

    eagleguy, Dec 11, 2010 ... 2
    Replies:
    21
    Views:
    4,380
    monzaz
    Dec 14, 2010
  41. eagleguy

    Rear end question? posi or not?

    eagleguy, Jan 9, 2010 ... 2
    Replies:
    21
    Views:
    4,088
    Ken Mild
    Jan 13, 2010
  42. vivalawham

    Carrier Bearing - Help!!

    vivalawham, Sep 6, 2009 ... 2
    Replies:
    21
    Views:
    4,102
    vivalawham
    Oct 22, 2009
  43. 70sLark

    How to service and old GM POSI

    70sLark, Nov 10, 2008 ... 2
    Replies:
    21
    Views:
    1,901
    70sLark
    Nov 13, 2008
  44. marcflag

    Running 3500 at 70 want to run 2500 at 70

    marcflag, Jan 7, 2007 ... 2
    Replies:
    21
    Views:
    1,141
    Sturmgewehr
    Jan 13, 2007
  45. Torque2

    Can you ID this 12 bolt from a '71 Skylark?

    Torque2, Jul 27, 2005 ... 2
    Replies:
    21
    Views:
    1,511
    Kelly Eber
    Aug 1, 2005
  46. Bygblok

    chevelle/skylark rearend width difference?

    Bygblok, May 4, 2020 ... 2
    Replies:
    20
    Views:
    2,184
    MKdefender
    Dec 18, 2023
  47. Luxus

    Differential noise

    Luxus, May 3, 2023 ... 2
    Replies:
    20
    Views:
    849
    monzaz
    Jun 5, 2023
  48. StKing

    Rear end axle shafts different offset after assembly?

    StKing, Feb 8, 2021 ... 2
    Replies:
    20
    Views:
    1,112
    monzaz
    Feb 16, 2021
  49. lsSkylark

    8.5 rear end build for 550 hp

    lsSkylark, Sep 20, 2020 ... 2
    Replies:
    20
    Views:
    1,470
    DasRottweiler
    Oct 8, 2020
  50. 71GSX455-4SPD

    Boattail Riv + 575HP + Built 10 Bolt + Slicks = ?

    71GSX455-4SPD, Jan 4, 2020 ... 2
    Replies:
    20
    Views:
    1,339
    telriv
    May 21, 2020
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