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Thread: GM Crankshaft Casting Numbers


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  1. 05-14-2024, 12:28 AM #1
    admin

    Administrator Join DateNov 2022Posts62

    GM Crankshaft Casting Numbers

    Crankshaft Identification
    Use these casting numbers to identify the crankshaft you have.
    Small Block Casting numbers
    Casting Number
    CID
    Years
    Journals
    Stroke
    Comments
    1130
    307/327
    68-73
    2.45/2.10
    3.25
    Nodular Iron
    1178
    302

    2.45/2.10
    3
    Forged
    1181
    305/350
    68-76
    2.45/2.10
    3.48
    Nodular Iron
    1182
    350

    2.45/2.10
    3.48
    Forged
    2680
    327

    2.30/2.00
    3.25
    Forged
    2690
    350

    2.45/2.10
    3.48
    Forged
    3279
    302
    68-69
    2.45/2.10
    3
    Forged
    4577
    327
    62-67
    2.3/2.0
    3.25
    Nodular Iron
    4672
    307/327
    68-73
    2.45/2.10
    3.25
    Nodular Iron
    310514
    350
    77-85
    2.45/2.10
    3.48
    Nodular Iron
    330550
    350
    73-75
    2.45/2.10
    3.48
    Forged
    354431
    262
    75-76
    2.45/2.10
    3.1
    Nodular Iron
    3727449
    283
    57-67
    2.3/2.0
    3
    Forged
    3729449
    265
    55-57
    2.3/2.0
    3
    Forged
    3734627
    327
    62-67
    2.3/2.0
    3
    Forged
    3735236
    265/283
    55-67
    2.3/2.0
    3
    Forged
    3735263
    283
    57-63
    2.3/2.0
    3
    Forged
    3782680
    327
    62-67
    2.3/2.0
    3.25
    Forged
    3814671
    327

    2.30/2.00
    3.25
    Forged
    3815822
    265/283
    55-67
    2.3/2.0
    3
    Forged
    3835236
    283
    57-65
    2.3/2.0
    3
    Forged
    3836266
    265/283
    56-63
    2.3/2.0
    3
    Forged
    3849847
    283
    57-67
    2.3/2.0
    3
    Forged
    3876764
    283
    64-67
    2.3/2.0
    3
    Nodular Iron
    3876768
    283
    64-67
    2.3/2.0
    3
    Nodular Iron
    3884577
    327

    2.30/2.00
    3.25
    Forged
    3892690
    350
    68-85
    2.45/2.10
    3.48
    Forged
    3911001
    307/327
    68-73
    2.45/2.10
    3.25
    Nodular Iron
    3911011
    307/327
    68-73
    2.45/2.10
    3.25
    Nodular Iron
    3914672
    327

    2.45/2.10
    3.25
    Forged
    3923279
    302

    2.45/2.10
    3
    Forged
    3932442
    305/350
    69-85
    2.45/2.10
    3.48
    Nodular Iron
    3941174
    307/327
    68-73
    2.45/2.10
    3.25
    Nodular Iron
    3941178
    302
    68-69
    2.45/2.10
    3
    Forged
    3941182
    350
    68-76
    2.45/2.10
    3.48
    Forged
    3941188
    350

    2.45/2.10
    3.48
    Forged
    3949847
    283
    64-67
    2.3/2.0
    3
    Nodular Iron
    3951130
    327

    2.45/2.10
    3.25
    Forged
    3951529
    400
    70-80
    2.65/2.10
    3.75
    Nodular Iron
    10106122
    350
    90-95
    2.76/2.10
    3.66
    Forged LT-5 ZR-1
    10168568
    265

    2.45/2.10
    3
    Cast One Piece Seal
    12552216
    346

    2.558/2.10
    3.62
    Cast LS-1 One Piece Seal
    14088526
    305
    1986
    2.45/2.10
    3.48
    Nodular Iron One piece seal
    14088532
    350
    86-88
    2.45/2.10
    3.48
    Forged One piece seal
    14088535
    305/350
    86 & UP
    2.45/2.10
    3.48
    Nodular Iron One piece seal
    14088552
    350
    86 & UP
    2.45/2.10
    3.48
    Forged One piece seal








    Big Block Crankshaft
    Casting Number
    CID
    Years
    Journals
    Stroke
    Comments
    3520
    454

    2.75/2.20
    4
    Forged
    3521
    454
    70-88
    2.75/2.20
    4
    Forged LS-6
    3524
    454

    2.75/2.20
    4
    Forged
    6223
    366/396/402/427
    68-76
    2.75/2.20
    3.76
    Forged
    7115
    366/396/402/427
    65-76
    2.75/2.20
    3.76
    Forged
    7416
    454
    70-88
    2.75/2.20
    4
    Forged
    7463
    454

    2.75/2.20
    4
    Forged
    336782
    454

    2.75/2.20
    4
    Cast
    353039
    454
    70-88
    2.75/2.20
    4
    Nodular Iron
    353638
    454

    2.75/2.20
    4

    359730
    454

    2.75/2.20
    4

    3732692
    348

    2.75/2.20
    4

    3732692
    348
    1958
    2.50/2.20
    3.25
    Forged
    3733223
    409
    62-65
    2.50/2.20
    3.5
    Forged
    3733223
    348

    2.50/2.20
    3.25
    Forged
    3733226
    348

    2.50/2.20
    3.25
    Forged
    3733226
    348
    1958
    2.50/2.20
    3.25
    Forged
    3741640
    348

    2.50/2.20
    3.25
    Forged
    3741640
    348
    59-61
    2.50/2.20
    3.25
    Forged
    3741642
    348

    2.50/2.20
    3.25
    Forged
    3741642
    348
    59-61
    2.50/2.20
    3.25
    Forged
    3788072
    409
    1961
    2.50/2.20
    3.5
    Forged
    3788072
    409

    2.50/2.20
    3.5
    Forged
    3795589
    409
    61-62
    2.50/2.20
    3.5
    Forged
    3795589
    409

    2.50/2.20
    3.5
    Forged
    3804816
    366/396/402/427
    61-76
    2.75/2.20
    3.76
    Nodular Iron
    3815822
    348
    58-61
    2.50/2.20
    3.25
    Forged
    3815822
    348

    2.50/2.20
    3.25
    Forged
    3824553
    348
    58-61
    2.50/2.20
    3.25
    Forged
    3824553
    348

    2.50/2.20
    3.25
    Forged
    3829027
    409

    2.50/2.20
    3.5
    Forged
    3829027
    409
    1963
    2.50/2.20
    3.5
    Forged
    3837466
    409/427

    2.50/2.20
    3.65
    Forged Z-11Special performance
    3837466
    409
    1963
    2.50/2.20
    3.5
    Forged Z-11
    3838416
    409
    64-65
    2.50/2.20
    3.5
    Forged
    3838416
    409

    2.50/2.20
    3.5
    Forged
    3856223
    396/402
    65-71
    2.75/2.20
    3.76
    Nodular Iron
    3863114
    402

    2.75/2.20
    3.76

    3863144
    366/396/402
    68-85
    2.75/2.20
    3.76
    Forged
    3874874
    366/396/402/427
    66-85
    2.75/2.20
    3.76
    Forged
    3879621
    427

    2.75/2.20
    3.76
    Forged
    3882841
    396

    2.75/2.20
    3.76
    Forged
    3882842
    366/396/427

    2.75/2.20
    3.76
    Forged
    3882849
    366/396/427

    2.75/2.20
    3.76
    Forged
    3887114
    396

    2.75/2.20
    3.76
    Forged Special performance
    3904815
    366/396/402/427
    65-76
    2.75/2.20
    3.76
    Nodular Iron
    3962523
    454

    2.75/2.20
    4
    Forged
    3963521
    454

    2.75/2.20
    4
    Forged Special performance
    3963524
    454
    70-72
    2.75/2.20
    4
    Forged
    3965746
    NA

    NA
    NA
    Semi finished Forged crank
    3965753
    NA

    NA
    NA
    Semi finished Forged
    3967416
    454
    70-71
    2.75/2.20
    4
    Forged
    3967463
    454
    70-88
    2.75/2.20
    4
    Forged
    3975495
    454

    2.75/2.20
    4

    3975945
    454

    2.75/2.20
    4

    3993804
    NA

    NA
    NA
    Raw Forged crank
    3993878
    454

    2.75/2.20
    4
    Forged
    10051169
    NA

    NA
    NA
    Raw Forged
    10114186
    427

    2.75/2.20
    3.76
    Forged
    10114187
    396

    2.75/2.20
    3.76
    Cast
    10114188
    454

    2.75/2.20
    4
    Cast One Piece Seal
    14097044
    454/502

    2.75/2.20
    4
    Forged One Piece Seal






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