Reference

1975-1980 Jeep CJ VIN numbers can be found in a few different places. They can be on the driver's side firewall near the brake master cylinder, on the driver's side dash or near the parking brake lever on the inside body panel.


Character
   
1st
J
(Jeep Corp.)
Make
2nd
5 = 1975
6 = 1976
7 = 1977
8 = 1978
9 = 1979
0 = 1980
Year
3rd
A = Auto
F  = 3 speed
M = 4 speed
Transmission
4th & 5th
83 = CJ-5
84 = CJ-6
93 = CJ-7
Model
6th
A = 3,750 lbs
E = 4,150 lbs
GVW
(Gross Vehicle Weight)
7th
A = 258ci, 1 bbl
C = 258ci, 2 bbl
E = 232ci, 1 bbl
H = 304ci, 2 bbl
Engine
8th - 13th
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SSN
(Sequential Serial Number)

Courtesy of Jeepfan.com