Automatic transmission

An automatic transmission, comprising:

• a brake including:
• a fixed-side cylindrical member spline-coupled to a transmission case;
• a rotation-side cylindrical member coupled to a given rotating member;
• a plurality of friction plates disposed between the fixed-side cylindrical member and the rotation-side cylindrical member, and including a fixed-side friction plate configured to be spline-engaged with the fixed-side cylindrical member and a rotation-side friction plate configured to be spline-engaged with the rotation-side cylindrical member;
• and
• a piston configured to engage the plurality of friction plates;
• and
• a shock absorbing member disposed between a spline part of the transmission case and a spline part of the fixed-side cylindrical member and configured to absorb impact when the fixed-side cylindrical member rotates relative to the transmission case, wherein the shock absorbing member includes:
• a first shock absorbing member disposed between a tooth surface of the spline part of the transmission case at a first side in a rotational direction, and a tooth surface of the spline part of the fixed-side cylindrical member at a second side in the rotational direction;
• and
• a second shock absorbing member disposed between a tooth surface of the spline part of the transmission case at the second side in the rotational direction, and a tooth surface of the spline part of the fixed-side cylindrical member at the first side in the rotational direction.