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    Understanding Production Date Codes ©

By Moparr Motor - Detroit (Nov 1992, Dec 2004, Dec 2010)

The following information can be used as your guide to better understand the date codes that are applied to components used in the production of vehicles. There are various types of date code identification applied to material.

Production dates could be etched, stamped (ink or steel punch type) on the part or even on a tag. Keep in mind that this is just a guide. Chrysler has a scheme that was to be followed however, some suppliers applied the code slightly different. Some codes are easy to spot and translate and some require a considerable examination.

Typically the scheduled vehicle production would be from August 1st to July 31st.

Ref

Date code type

Code meaning

Example

Components typically found with this type of date identification

A

Alpha-numeric 2 digit code

Month & Year

E9 = May 1969

Carter carburetor base, Carter Fuel pump, Viscous fan drives, drive shafts

B

Single digit

Year

G = 1971

Engine identification pad

C1

Two digit

Month & Year

71= 7th month (July) 1971

or

A 0 = January 1970

Side view mirrors, glass, wheels, temperature sending units. Prestolight ignition distributor ID tag, oil pressure-sending unit.

C2

Two digit

Year (Calendar)

70 = 1970

Alternator and starter

C3

Two digit

Month & Day

12 6 = December 6th

Wheels . The part number would give you an idea of the year.

C4

Two digits with dots

Year & Month

7. . . = 1967 March

9. . = 1969 February

Motor mount

D1

Three digit

Production week & Year

301 = 30th week of 1971

Exhaust manifolds, seat tracks, fuel sending units, ignition coils, voltage regulators, ignition distributor tags, lower control arms horns

D2

Three digit

Month, Day & Year

12 6 71= December 6, 1971

U joint strap, alternator, engine block,

D3

Three digit

Month, Day & Year

12 6 1=

December 6, 1971

U joint strap, alternator, engine block

D4

Three digit

Production week & year

241= 41st week of 1971

U joint strap, alternator, engine block , torsion bars, belts,

E1

Four digit

Day of year & Year

3301 = 330th day of 1971

K frame, master cylinder, power steering gear, windshield wiper motor, Holley carb, Carter carb ID tag, hoses, Radiator, Hood catch , hood latch, emergency brake mechanism

E2

Four digit

Day, Month & Year

10 9 69 = October 9, 1969

Dana axle tubes, exhaust manifolds, water pump

E3

Four digit

10,000 Day calendar

2995 = Oct 9, 1969

Hemi engines, manual and automatic transmissions

F

Five digit

Year & Quarter

1971 1 = 1st quarter of 1971

Spark plug wires

G

Cast Star wheel (12)

Year & Month

*

Alternator starter

H

Cast boxes (12)

Year & month

*

Automatic transmission tail shaft

* = Casting date. The spokes or boxes that have dots in them represent the month that the component was cast. Dots in 5 spokes or boxes = May, Dots in 10 spokes or boxes = October.

The Month numerals are as follows

1

January

7

July

2

February

8

August

3

March

9

September

4

April

10

October

5

May

11

November

6

June

12

December

The Month letters are as follows

A

January

G

July

B

February

H

August

C

March

J

September

D

April

K

October

E

May

L

November

F

June

M

December

 
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