Crankshaft Idemntification

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GM Crankshaft Casting Numbers

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Thread: GM Crankshaft Casting Numbers

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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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