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By Moparr Motor - Detroit (Nov 1992, Updated Dec 12, 2004)
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.
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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 |
331 = 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 |
1972 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
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1 |
January |
7 |
July |
|
2 |
February |
8 |
August |
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3 |
March |
9 |
September |
|
4 |
April |
10 |
October |
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5 |
May |
11 |
November |
|
6 |
June |
12 |
December |
The Month letters are as follows
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A |
January |
G |
July |
|
B |
February |
H |
August |
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C |
March |
J |
September |
|
D |
April |
K |
October |
|
E |
May |
L |
November |
|
F |
June |
M |
December |
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