Editing General Motors transmissions (section)
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====Identifying Muncie M20 series transmissions==== The external differences between the three Muncie 4 speed transmissions can be deceiving. If the cover is removed, the pitch of the gears can be seen. In order to tell the difference between an M21 and M22 definitively, look at the helix angle on the gearset. M20 and M21 have a steeper pitch, where the M22 will have a less aggressive pitch. M22s are NOT straight-cut or 'spur gears'. [[File:Muncie gearsM20-21 VS M22.jpg|thumb|400px|left|]] <br style="clear:both"/> Link to a Muncie page showing [http://www.dandltransmission.com/muncieratio.html Muncie gear ratio, spline counts, exploded view, parts list, etc.] from D&L Transmissions.
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