check engine light is on and it won t shift into 2 or 4 over drive on 1995 Mercury Mystique

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check engine light on code says not shifting into 2 or 4 could it be something besides the transmisson
(1) Answer
What codes are you getting? I'm not sure of a code saying not shifting into 2 or 4.

If you have transmission related codes, it must be transmission related, or at least transmission input related (range sensor, speed sensor).