Anti-rotate attenuation device

A concentric slave cylinder piston assembly for use in an automatic transmission, the assembly comprising:

• an inner piston;
• an inner piston cylinder disposed adjacent to the inner piston and having portions forming a receiving slot;
• an outer piston cylinder disposed adjacent to the inner piston;
• an outer piston disposed adjacent to the outer piston cylinder;
• and
• a piston guide having a main body portion and an alignment protrusion extending from the main body portion, the piston guide being attached to the inner piston, the alignment protrusion being disposed in the receiving slot of the inner piston cylinder, the alignment protrusion comprising a main alignment portion and a spring lever, the spring lever being separated from the main alignment portion by a gap, the piston guide having a compressible material disposed in the gap.

A concentric slave cylinder piston assembly for use in an automatic transmission, the assembly comprising:

• an annular inner piston;
• an annular inner piston cylinder disposed concentrically within the inner piston, the inner piston cylinder having portions forming a receiving slot;
• an annular outer piston cylinder disposed adjacent to the inner piston, wherein the inner piston is disposed concentrically within the outer piston cylinder;
• an annular outer piston disposed adjacent to the outer piston cylinder, wherein the outer piston cylinder is disposed concentrically within the outer piston;
• and
• a piston guide having an annular main body portion and an arcuate alignment protrusion extending from the main body portion, the main body portion being attached to the inner piston, the alignment protrusion being disposed in the receiving slot of the inner piston cylinder, the alignment protrusion comprising a main alignment portion and a spring lever, the spring lever being separated from the main alignment portion by a gap, the piston guide having a compressible elastomeric material disposed in the gap.