PISTON, AOD / AODE / 4R70W 2-3 ACCUMULATOR PISTON BONDED DESIGN 1992-ON. Bonded design, will retro fit back to 1983 AOD.
AOD / AODE / 4R70W Sonnax 2-3 accumulator piston is a direct OEM replacement. The bonded rubber piston seals will prevent leakage between the piston O.D. and the case bore. This piston assembly is used in AODE and 4R70W transmissions.