The M-38A1 was an entirely new post-WW II jeep, even though it was numbered as a variant of the M38 jeep.
U.S. President Lyndon B. Johnson (LBJ) and Major General Ben Sternberg, Commander, 101st Airborne Division (Air Assault), standing in M-38A1 jeep during a rainstorm at a ceremony at Fort Campbell, KY, 23 July 1966.
The M38A1 was the military improvement upon the M38 Jeep, introduced in 1952. It was a new design, known internally at Willys as the MD, not just a modification of the M38. It featured rounded front fenders, a contoured hood, two-piece windshield, top-mounted windshield wipers, and a new "Hurricane" F-Head engine.
The M-38A1 closely resembled the CJ-5 civilian model jeep. It differed from the CJ-5 in that it had a stronger frame and suspension, reversed front spring shackles, standardized M-series instruments and electrical accessories, with a 24-volt electrical system.
The M38A1 was manufactured by Willys, and had an F-head, 4-cycle, 4-cylinder engine. It had a crew of one and could carry three passengers.
The M38A1 jeeps that were built for the U.S. Army (and used by all the armed services) are very popular with collectors due to their reasonable size, ready availability of parts, and great off-road capabilities. There are many websites and forums devoted to the M38 and M38A1 jeep, some of the best collected on the linked page.
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