It doesnt mean anything. Chrysler didnt use to code there engines at all. The import companies started that trend. For example, no code exists for the old 2.2/2.5 Turbo, but they did code all the old transmissions with pointless names. Old trans name examples A525, A520, A523, A555, A568, A413. Thats about as meaningless as A853. :\centuryi said:What does A853 mean. To me there is no pattern to try and figure out what it stands for. Like B18, B16, 4G63, SR20. They can all be diffused. But I can't figure out A853. Anyone know?