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Muncie Articles

Collection of Muncie articles and other related information.
Below is a list of articles with the most recent ones listed first.
Muncie: Reading Serial and VIN Numbers  
The letter "P", which stands for Muncie Plant, is always the beginning of the serial numbers for Muncie 4 speeds. P was chosen because it was the next logical letter, the letter M was already used to ID for the Muncie plant for the Muncie 3 speed while the letter O, resembles zero that might ad...
How to identify Muncie 4 Speeds  
Third, are the date codes and VIN numbers that help confirm that the above case and gears belong together. Tooth counts on the input shaft will help confirm a certain gear ratio, but you may not have access to this information if the transmission is still in the car or an unwilling vendor at a swap...
Identifying Muncie 4 speeds III  
The M22 4 speed or commonly known as the "rockcrusher", differs from M21, though they had the same gear ratios, with its heavy duty gearset. This was designed primarily as a road race transmission. Its straighter angle on the gearset produced less heat and less end loading of the gear train. ...
Muncie 4-Speed Transmission  
Wide ratio (M20) and the close-ratio (M-21) were the two different ratios that produce the Muncie 4-speeds. There was another ratio that was offered, the extra heavy duty close-ratio version (M-22), this was offered mostly on many of the big-block high-performance models. Both the engine size and th...
Muncie 4 Speed Transmissions - Rare Parts  
Doug Nash Corporation was able to produce a Muncie 4 speed case, around late 1960's to early 1970's, it was called the Doug Nash Muncie 4 speed case, along with it is a gear set. The best thing about it, is that it is heavy and made up of nodular iron, on the other hand its reverse idler boss w...

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