There are 3 types of 4 X 4 transmissions and at Trans-Mico Automotive, we are qualified to take care of all of them, as well as regular transmissions. Four-wheel drives can be : engageable (all terrain vehicle), semi-permanent (berlines and front-wheel drive SUVs/4×4) or permanent (berlines and high end SUVs/4×4). Semi-permanent transmission will activate itself when it senses that the front and back wheels are not at the same speed. Permanent 4 X 4 is always activated. Like all other transmission, they also have to be maintained, repaired or rebuilt. Only a specialist will care for your 4 X 4 and do the repairs needed, giving you, peace of mind.