Unlike modern vehicles, the difference between CJ models was not distinct. Therefore all CJ-3As are not even the same. These differences can be used to roughly date when a vehicle was manufactured. The commonly accepted description of the CJ-3A seems to apply only to the mid production vehicles.
The lack of factory parts information from the CJ-3A time period makes it very difficult to decide if and when changes were made. Many of the listings in the Parts Master List are for years later than Both manuals contain some errors and omissions.
To further complicate things Willys also had a manufacturing facility in California. Willys Service Bulletin explains "the effective serial numbers given apply to changes made in vehicles assembled at the Toledo plant and do not apply to those assembled in our west coast plant".
The CJ-3As military sibling, the M38, also went through many changes. Changes in the M38 seem to parallel a similar change in the CJ-3A with the military change happening first. Vehicle serial number tags are attached with 4 screws to the engine side of the firewall near the air filter. The vehicle serial number had a prefix of CJ-3A for the first 2 years of production. During this time the serial numbers continued to climb with no regard for model year.
Starting in , and continuing through final production, a new format was used. The prefix was changed to indicate the model and model year and the serial number itself was reset to at the beginning of each model year.
Body Tags The earliest CJ-3As have a body number tag below the serial number tag on the firewall. Later in , and for the remainder of production, the body tag was eliminated.
Body tag numbers are initially close to the vehicle serial number and then skew to about less than the vehicle serial number. What does this mean? How could there be less bodies than vehicles? Early in the model year Willys began to build their own bodies. Starters and Generators Starter and generator numbers are found on a tag that is riveted to their housings. Three different starters were used. The first vehicles used the Autolite MZ In mid the starter was changed to MZ, according to Autolite manuals.
Willys Service Bulletin lists a change in the starter and starter push rod at vehicle serial number CJ-3A which is in the model year. The first two starters are very similar, are activated by a foot pedal linkage, open nosed, and use a tooth flywheel. The third starter is Autolite MCH This starter is key activated with a solenoid mounted to the top of the starter and is the closed nose type.
It uses a tooth flywheel. The Universal Service Manual states that the third starter was put into production with vehicle serial number and, on a different page, engine serial number By adding the prefixes GB1 to the vehicle serial number and 3J to the engine number, the result is vehicle GB1 with engine 3J These are credible numbers for a CJ-3A and this data fits perfectly into the information collected from existing vehicles.
The engine block change to the larger rear flange also occurred at this serial number. I plan to keep it red. Originally Emerald Green. Original color Luzon Red, Brass adaptor for 2A engine. Was green, Swiss Army. Originally Potomac Grey. BradshawLagory msn. Sdwebbelectric cs. Kastoria, north-west Greece.
Bovey Tracey, Devon, UK. Euclair, WI Craigslist. Washington co. Saitama, Japan. Anacortes, Washington. Bullseye dreamscape. Copps telecomwest. No engine number — industrial engine. Holm36 aol. Otavio de Barros Gomes.
I'd be flattered. Danny writes: "I am the proud owner of a cj3a serial It was bought by the Belgian army in and, like many of them, modified to a Belgian semi-M38 to serve the army from till For the Belgian army, the M38 was too expensive at that time.
So they bought a lot of 3a's and rebuild them to become a "Belgian" M38 with a 24V circuit, and some modifications to the frame, body and painting. So in the end, the modified 3a was more expensive than an original M I bought him in a very good state, just had to do a lot of cleaning up. It has also an original Bantam trailer with it.
For the moment, I am putting him in the original M38 state. Greetings and good luck building the website. Danny Raemdonck". Aramis writes: "My name is Aramis Villalobos I'm from San Jose Costa Rica Central America and I'm a happy and proud owner of a cj3a don't know the serial number since the jeep didn't have any tags when I bought it. The engine shows on the right side of the water boss I believed that's how you write it GPW I believe this is not correct for this model but it is a Willys engine from a ford jeep.
I wish I could find the correct data for it. Any how I'm still happy with it, I've try to keep it and restored as original as possible right now it's got the military look but that might change in a short time since I'm planning to repainted thinking of black what you think Sir?
Any ways my inquiry is to the possibility that you guys post a picture of it on your page I would be more than honor to see it on this wonderful and most informative actually I have learn quiet a bit about my jeep thanks to this page. Please don't hesitate to write me on any inquire or advise that you might have related to my Willys. I am working on it now. Runs and drives. It has body rust which I am replacing with new panels, front floor complete, right side panel, right cowl panel. The other side is minor and I will weld in metal patches.
The tags have been taken off. They titled it by the engine number, I assume, which I cant read due to decking block on rebuild. You can see where there was two tags by the air filter. So I assume it is an early Will know more when I get it apart to inspect running gear for numbers.
The title reads Jeep - Serial 3J There is also a brass tag riveted to side of the engine that says rebuilt engine. Plus some things I cant read on it yet. I need the engine out to read it clearly. Will enclose picture of that also. Last owner owned it since Its original color is Luzon Red.
Bottom coat under ever thing, I took off. I will keep you updated as I go along. Emmett, Lancaster, TN". I owned it back in the 80's, a nice solid original. Over the years the man I sold it to rebuilt components as needed, painted a nonoriginal red, added the JC Whitney top. It now has the common here in Maine Jeep Hi-Lo generator mounted pump. Along with the 4 weed type tire chains, this is a real workhorse.
Thanks, Glenn Byron, Smithfield, Maine".
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