Turn the impact driver so that its right side faces up. Remove the eight identical Phillips screws that hold the two sides of the housing together.

Gently pull up on the side of the housing. Use a prying tool or flat head screwdriver to separate the two sides of the housing. Be sure to keep the yellow battery terminal seated in its slot on the lower housing.

When the housing is almost open, the forward/reverse change lever will catch on a round tab at the top of the trigger switch. Gently lift up on the trigger while pulling the housing up and towards the rear of the impact driver, allowing it to come free.

When reassembling the impact driver, make sure to set the round tab of the switch into the groove on the forward/reverse change lever.