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• GM Crankshaft Casting Numbers

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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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