Top Definition
The popular term for the 5-speed manual transmission on a 2002-2007 Subaru Impreza WRX. Known for its ability to catastrophically shatter gears even during normal driving.
Steve: "My WRX lost 2nd gear yesterday when I was driving up hill street."

Mike: "I told you that car had a glass transmission. Should have bought an evo."
by Joel Schumacher December 29, 2008
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