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  1. J

    98 2WD to 4WD Conversion

    I'm converting a 98 2WD to 4WD. Do I need to change the PCM (Powertrain Control Module - The main computer under the cowl accessed from the engine compartment)? I have the two boxes located in the dash (the GEM and another one). I also have the short harness that goes to the T-case and...
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