What factors played a role in the Jeep CJ3A's weak development during its 4 year stint in the public marketplace?
There were less overall sales of the CJ3A model (1949 to 1953) when compared with its predecessor the CJ2A (1946 to 1949).
The Willys Jeep CJ3A sported a few body and mechanical changes including a one-piece windshield frame, bottom frame located wipers, structural changes to the body to allow more seating and leg room in the rear seat area, and an improved convertible top frame structure to allow more head room with the canvas top in the "up" position.
A few engine modifications and upgrades were added to the "Go-Devil" engine and drive train including stronger axles, heavy duty clutch, improved carburetion and a better fuel pump.
The Willys-Overland Company was still desperately trying to find a market for the little CJ. Orders from farmers were declining because even the "AgriJeep" CJ styles couldn't compete well with the single purpose farm tractors. Willys even built a few modified, stripped CJ3A Jeep "Tractors" but eventually cancelled the idea.
Orders also appear to have declined in part because Willys had begun producing the Willys Station Wagon, Willys Trucks, and Jeepsters in 2-wheel and 4-wheel drive models to compete with the other auto manufacturers in the public arena. The CJ was not the only fish in the pond anymore.