Got gears?

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

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  1. Cutlass

    Tricks to install pinion seal 2043 without J-xxxxx installer tool @ '71 8.5

    Cutlass, Jul 7, 2019
    Replies:
    16
    Views:
    1,664
    FLGS400
    Oct 30, 2020
  2. Donnie

    8.2 gs rear

    Donnie, May 27, 2020
    Replies:
    11
    Views:
    800
    TXGS
    Oct 29, 2020
  3. JoRion

    3.08 vs 3.23 with Muncie m20

    JoRion, Oct 26, 2020 ... 2
    Replies:
    28
    Views:
    1,999
    JoRion
    Oct 29, 2020
  4. MEXICOYA

    3:42 gears with a ST 300 2 spd on a 68 Skylark

    MEXICOYA, Oct 15, 2020
    Replies:
    13
    Views:
    1,195
    TrunkMonkey
    Oct 26, 2020
  5. 73Rivi

    1973 Riviera 9 3/8 Posi

    73Rivi, Oct 3, 2020
    Replies:
    9
    Views:
    522
    GSX 554
    Oct 19, 2020
  6. Stage2

    Estate Wagon vs Wildcat

    Stage2, Apr 26, 2020
    Replies:
    14
    Views:
    984
    mich6212
    Oct 16, 2020
  7. txstratdad

    8.2 posi

    txstratdad, Oct 14, 2020
    Replies:
    2
    Views:
    383
    BrianTrick
    Oct 14, 2020
  8. TTNC

    Upgrading Chevy 12 bolt to 9 inch

    TTNC, Oct 12, 2020 ... 2
    Replies:
    23
    Views:
    1,086
    TTNC
    Oct 14, 2020
  9. TheEternalDance

    Stock Axle/Rear End Good to ??? HP/TQ

    TheEternalDance, Oct 7, 2020
    Replies:
    9
    Views:
    628
    Gary Bohannon
    Oct 14, 2020
  10. TTNC

    Chevy 12 bolt A body mounting differences

    TTNC, Oct 13, 2020
    Replies:
    2
    Views:
    382
    BrianTrick
    Oct 14, 2020
  11. 68 Skylark cust

    1968 350-2 : Gear suggestion

    68 Skylark cust, Sep 15, 2020
    Replies:
    13
    Views:
    704
    philbquick
    Oct 13, 2020
  12. STREETFIGHTER50

    Did axle widths change between 1968-1972 Skylarks?

    STREETFIGHTER50, Oct 7, 2020
    Replies:
    4
    Views:
    395
    STREETFIGHTER50
    Oct 9, 2020
  13. lsSkylark

    8.5 rear end build for 550 hp

    lsSkylark, Sep 20, 2020 ... 2
    Replies:
    20
    Views:
    1,523
    DasRottweiler
    Oct 8, 2020
  14. Mart

    8.5 posi with 308 GM gears

    Mart, Oct 5, 2020
    Replies:
    5
    Views:
    376
    Mark Demko
    Oct 6, 2020
  15. Rob72GS

    8.5 Limited Slip

    Rob72GS, Sep 28, 2020
    Replies:
    4
    Views:
    411
    TexasT
    Sep 29, 2020
  16. gs430

    Ring and pinion setup advice

    gs430, Oct 5, 2019 ... 2
    Replies:
    37
    Views:
    2,069
    BrianTrick
    Sep 18, 2020
  17. stall1970

    Lube

    stall1970, Sep 3, 2020
    Replies:
    2
    Views:
    274
    monzaz
    Sep 4, 2020
  18. Brandon Cocola

    GS rear end I.D.

    Brandon Cocola, Aug 30, 2020
    Replies:
    9
    Views:
    448
    BrianTrick
    Sep 4, 2020
  19. wildcat1562

    a bit of help please with my rear end

    wildcat1562, Jul 1, 2020
    Replies:
    10
    Views:
    640
    SpecialWagon65
    Sep 3, 2020
  20. gnx423

    Ring gear pattern advice

    gnx423, Aug 28, 2020 ... 2
    Replies:
    21
    Views:
    790
    monzaz
    Sep 2, 2020
  21. Rad005

    63 Riviera Differential Fluid Specs

    Rad005, Aug 24, 2020
    Replies:
    2
    Views:
    282
    Rad005
    Aug 24, 2020
  22. ghrp

    Electra 75 rear end ?

    ghrp, Aug 18, 2020
    Replies:
    12
    Views:
    459
    ghrp
    Aug 24, 2020
  23. robert v

    Please help ID my rear ratio

    robert v, Aug 19, 2020
    Replies:
    6
    Views:
    308
    robert v
    Aug 20, 2020
  24. gnx423

    Rear gear options

    gnx423, Aug 19, 2020
    Replies:
    3
    Views:
    417
    gnx423
    Aug 19, 2020
  25. Nickcee61

    **1961 Buick vs 1963 Riviera 9 3/8 swap**

    Nickcee61, Aug 17, 2020
    Replies:
    2
    Views:
    406
    Nickcee61
    Aug 17, 2020
  26. jmbarber

    What is this rear end

    jmbarber, Jun 7, 2020 ... 2
    Replies:
    38
    Views:
    1,326
    jmbarber
    Aug 17, 2020
  27. rkammer

    Changing Ratios in the GM 8.5

    rkammer, Aug 5, 2020
    Replies:
    17
    Views:
    1,330
    BrianTrick
    Aug 6, 2020
  28. Rob72GS

    Rear End Swap

    Rob72GS, Aug 2, 2020
    Replies:
    8
    Views:
    448
    monzaz
    Aug 3, 2020
  29. eric solheim

    Set9 bearing and 98-02 camaro brakes

    eric solheim, Jun 19, 2020
    Replies:
    4
    Views:
    424
    eric solheim
    Jul 16, 2020
  30. Jake G'S 455

    Replacement rear for my 69 GS

    Jake G'S 455, Mar 28, 2020 ... 2
    Replies:
    23
    Views:
    1,124
    BrianTrick
    Jul 11, 2020
  31. BubbaJ

    slip n slide

    BubbaJ, Mar 8, 2020 ... 2
    Replies:
    22
    Views:
    1,620
    kingdaddycreel
    Jul 3, 2020
  32. 71rivera

    A body center section vs E and G body???

    71rivera, Jul 2, 2020
    Replies:
    9
    Views:
    418
    71rivera
    Jul 3, 2020
  33. Jukka Haapanen

    67 riviera 3.07 posi

    Jukka Haapanen, Jun 10, 2020 ... 2
    Replies:
    22
    Views:
    1,046
    Lucy Fair
    Jun 25, 2020
  34. sean Buick 76

    8.2 interchange possi carriers?

    sean Buick 76, Jun 13, 2020
    Replies:
    7
    Views:
    560
    flynbuick
    Jun 22, 2020
  35. robert v

    1964 Pontiac Tempest rear compatibility for 1965 Skylark

    robert v, Jun 21, 2020
    Replies:
    12
    Views:
    877
    64 skylark mike
    Jun 22, 2020
  36. gscalifornia

    3.73 or 3.90 is there a big difference

    gscalifornia, Jun 5, 2020 ... 2
    Replies:
    37
    Views:
    2,892
    LARRY70GS
    Jun 18, 2020
  37. JStov

    Rear Axle Help

    JStov, May 3, 2020
    Replies:
    9
    Views:
    624
    LARRY70GS
    Jun 2, 2020
  38. john.schaefer77

    Pinion seal

    john.schaefer77, Aug 18, 2017
    Replies:
    19
    Views:
    1,105
    BrianTrick
    May 25, 2020
  39. 71GSX455-4SPD

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

    71GSX455-4SPD, Jan 4, 2020 ... 2
    Replies:
    20
    Views:
    1,351
    telriv
    May 21, 2020
  40. Dr. Evil

    Can anyone ID this rear end?

    Dr. Evil, May 16, 2020
    Replies:
    18
    Views:
    731
    monzaz
    May 19, 2020
  41. Dwayne B

    Seeping oil out of a plug weld

    Dwayne B, May 15, 2020
    Replies:
    5
    Views:
    439
    Dwayne B
    May 17, 2020
  42. 66rivnail

    Help with an axle shaft question

    66rivnail, May 9, 2020
    Replies:
    5
    Views:
    332
    66rivnail
    May 11, 2020
  43. jmos4

    Richmond 3.90 gears 8.2 BOP

    jmos4, May 1, 2020
    Replies:
    4
    Views:
    449
    jmos4
    May 6, 2020
  44. Jon Lewis

    1975 Buick wagon rear axle swap

    Jon Lewis, Mar 17, 2020
    Replies:
    13
    Views:
    1,026
    nekkidhillbilly
    Apr 29, 2020
  45. Rich Skylark

    Stamping Location

    Rich Skylark, Apr 16, 2020
    Replies:
    16
    Views:
    1,065
    monzaz
    Apr 29, 2020
  46. robert v

    Crack noticed on BOP 8.2 10 bolt (casting flaw or problem)

    robert v, Apr 23, 2020
    Replies:
    9
    Views:
    813
    monzaz
    Apr 25, 2020
  47. saskskylark71

    68 GS Rear Axle Tube Flanges

    saskskylark71, Apr 23, 2020
    Replies:
    15
    Views:
    719
    BrianTrick
    Apr 24, 2020
  48. BrianTrick

    Axle Bearings for 75 LeSabre 8.5”

    BrianTrick, Mar 18, 2020
    Replies:
    14
    Views:
    801
    newmexguy
    Apr 16, 2020
  49. Canadian GS 350

    Is this for an A body?

    Canadian GS 350, Apr 12, 2020
    Replies:
    10
    Views:
    877
    BrianTrick
    Apr 14, 2020
  50. B-rock

    8.5 with bolt in axles.

    B-rock, Apr 9, 2020
    Replies:
    18
    Views:
    1,070
    LARRY70GS
    Apr 11, 2020
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