Sonnax highlights its new high-strength billet aluminum piston (part no. 95984-01), which is designed to provide additional strength in ZF 6HP26 and Ford 6R60/75/80 transmissions. According to Sonnax, die-cast ZF 6HP26 and Ford 6R60/75/80 pistons commonly crack at the outer diameter of the apply area due to manufacturing defects and/or high stress areas, which is the problem this piston is aimed at correcting.