#518RED16. Sonnax Dodge 16% Oversize Intermediate Super Servo, Cover and Pin. Fits 727, 46RE, 47RE, 48RE, 518, 618, 46RH and 47RH. New eight sealing ring design for a super seal. Fifteen percent less leakage than the original servo. The overall result is more holding force in 2nd, firmer 1-2 and 2-3 shifts that become firmer under load.