About this page
I've attempted to distill all the information
we've gathered while trying to identify the model and year of
our 19?? CJ-?A "Ole Blue." Any
additional information would be greatly appreciated.
CJ3A vs. CJ-2A
3A one-piece windshield with cowl vent, 2A two-piece windshield
3A wipers on windshield cowl, 2A on the top of the windshield.
3A bumper bolted directly to front frame horns. 2A used gussets
between the front frame horns and the bumper.
Length of the top of the rear wheel well: 3A 32", 2A 35-5/8"
Distance between driver's seat and steering wheel: 3A 15.125",
Dana 41 rear axle - round cover ('48 - early '51)
Dana 44 rear axle - cover has straight sides (early '51 - '53)
Improved top setup (more head room). Overall vehicle height: 3A
66.375", 2A 64"
Improved carburetor: 3A Carter WO-636-S, 2A Carter WO-596-S
Improved fuel pump: 3A adds vacuum booster (for windshield wipers)
Improved camshaft: 3A gear driven, 2A chain driven
Improved front axle shaft design (chassis #37549 and up):
3A drive pinion spacer eliminated, 2A spacer
shaft outer end floats (not retained by nut and lockwasher), 2A
nut and lockwasher
eliminated lower king pin bearing shims, 2A shims
Improved clutch: 3A 165 foot-pounds, 2A 144 foot-pounds
Version of Bob Westerman's Early CJ Changes Database
Jeep CJ-3A Production Information
Serial Number Locations
numbers are located on the left front of the frame and on
the back of the bumper. The engine number was located at the
front of the engine block on the water pump boss.
was complied from the following resources:
Jeep on The CJ3B Page
Brochure for "The Universal Jeep" on The CJ2A Page
Vintage Jeep Barn: CJ-3A
The CJ-3A Information Page
by Jim Allen
by Moses Ludel