CJ2a
BusaDave9
Always Off-Roading Jeeper
- Posts
- 8,244
- Thanks
- 81
- Location
- Durango, Crawlarado
- Vehicle(s)
- 1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
CJ2a
The Willys-Overland CJ2A was built from 1945 to 1949. It was the first Jeep that was easily owned by the civilian public. The CJ2a was heavily based on the MB military Jeep. The MB has a 9 slot grill whereas the CJ2a has 7 slots.
1945 Willys CJ2a
images from motortrend.com
Engine
The CJ2a came with the L134 "Go Devil" L134 "Go Devil" four cylinder flat head engine.
Click here for more info on the L134 "Go Devil" engine. -->> https://jeep-cj.com/community/threads/four-cylinder-engines.43742/#post-396224
Axles
The MB came with 4.88 gearing in the axles but the CJ2a came with an even lower gear ratio of 5.38. Until about 1946 the CJ2a came with the Dana 23 full floating rear axle. This was the only full floating rear axle ever offered in a CJ. Click here for more info on the Dana 23 -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395381
Later the Dana 41 was used in the rear. Click here for more info on the Dana 41 -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395385
Originally the Dana 25 was used as the front axle for the CJ2a. ]Click here for more info on the Dana 25. -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395382
The low gears in the CJ2a axles were not good for the highway. They were meant for low off-road use. A large percentage of the CJ2a's were used for farm use. They were often fitted with plows to be used as a tractor. There was three optional PTO options for the CJ2a. One PTO could be fitted to the front of the engine. Another on the transmission and a third option was to have the PTO drive on the rear bumper. This PTO was powered off the rear of the Dana 18 transfer case.
The CJ2a had a vacuum motor activate the windshield wiper on the drivers side. To wipe the passenger window there was a hand lever you would move back and forth to wipe the passenger side.
The Willys-Overland CJ2A was built from 1945 to 1949. It was the first Jeep that was easily owned by the civilian public. The CJ2a was heavily based on the MB military Jeep. The MB has a 9 slot grill whereas the CJ2a has 7 slots.
1945 Willys CJ2a
images from motortrend.com
The CJ2a came with the L134 "Go Devil" L134 "Go Devil" four cylinder flat head engine.
Click here for more info on the L134 "Go Devil" engine. -->> https://jeep-cj.com/community/threads/four-cylinder-engines.43742/#post-396224
Axles
The MB came with 4.88 gearing in the axles but the CJ2a came with an even lower gear ratio of 5.38. Until about 1946 the CJ2a came with the Dana 23 full floating rear axle. This was the only full floating rear axle ever offered in a CJ. Click here for more info on the Dana 23 -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395381
Later the Dana 41 was used in the rear. Click here for more info on the Dana 41 -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395385
Originally the Dana 25 was used as the front axle for the CJ2a. ]Click here for more info on the Dana 25. -->> https://jeep-cj.com/community/threads/cj-axles.43623/#post-395382
The low gears in the CJ2a axles were not good for the highway. They were meant for low off-road use. A large percentage of the CJ2a's were used for farm use. They were often fitted with plows to be used as a tractor. There was three optional PTO options for the CJ2a. One PTO could be fitted to the front of the engine. Another on the transmission and a third option was to have the PTO drive on the rear bumper. This PTO was powered off the rear of the Dana 18 transfer case.
The CJ2a had a vacuum motor activate the windshield wiper on the drivers side. To wipe the passenger window there was a hand lever you would move back and forth to wipe the passenger side.