Description
Superior K086, Reverse Super Servo Piston & Pin.
Fits 47RE / 47RH / 48RE diesel transmissions only.
(WILL NOT FIT EARLY 618 TRANSMISSIONS)
Many Dodge transmissions experience rear servo piston sticking / breakage, pin bore wear, and reverse band slippage.
The servo piston has a tendency to get cocked in the bore and there is insufficient force to apply the band in a direct line.
The high reverse line pressure continues to apply against a cocked piston, causing piston breakage.
The bore of the piston also wears from side loading, resulting in insufficient band apply pressure.