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|aka||Type aka here, not up there|
|Body Style||how many doors+how many seats+what type of body|
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|Weight||Weight - you get the point|
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|Designer||Designer (lead designer if it was a team effort)|
The M38A1 was the replacement for the M38. Unlike other military vehicles where the A1 suffix would denote a minor revision, the M38A1 is a very different vehicle from the M38. It has a different frame, body, engine and axles.
The engine is a four-cylinder, liquid-cooled, gasoline engine of the F-head design with a combination valve-in-head and valve-in-block construction. The engine can operate when totally submerged in water, provided it is equipped with a deep-water fording ventilation system. Parts for the fording system can be acquired as a kit. The intake valves are located in the cylinder head while the exhaust valves are located in the cylinder block. Intake valves are operated through intake valve push rods and by overhead valve rocker arms. The exhaust valves, which are equipped with rotator caps, are operated by valve tappets in the cylinder block. The intake manifold is of the sealed in type, cast directly into, and considered a part of the cylinder head. The exhaust manifold assembly, a single case unit, is attached to the left side of the cylinder block. The power plant, including the engine, transmission, transfer, and radiator, is designed to be removed from the vehicle as a complete unit. The displacement is 134.2 cu-in, and it develops 72 brake hp @ 4,000 rpm.
== Transmissions (include gearing info) ==Warner T90 transmission.
=== summary of info for each trans ===The M38A1 has a Warner T90 transmission. It is a three speed manual transmission with synchronous mesh in 2nd and 3rd.
== Transfer Case (include gearing info) ==Spicer model 18.
=== summary of info for each TC ===The M38A1 uses a Spicer model 18 transfer case. This transfer case is basically a two speed transmission which is located after the standard transmission. It provides a means of transferring the power to the front axle. It can also provide a PTO for a variety of uses, commonly for a Ramsey winch.
== Axles (include gearing info) ==The front axle is a Spicer (now Dayna) 25 full-floating axle while the rear is a Spicer 44 semi-floating axle. The 4x series axle is much stronger than the 2x series. In high range, high gear, both the transfer case and the transmission are direct (1.0:1). With a gear ratio of 5.38:1, this gives a top speed of 60 mph.
See Jeep Wiki's comprehensive Jeep M-38A1 Review.
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