Overdrive And Intermediate Servo Pin Bore Sleeve Kit Sonnax 5R55N 5R55S 5R55W

Overdrive And Intermediate Servo Pin Bore Sleeve Kit for 5R55N, 5R55S, 5R55W Servo apply oil is channeled through the core of the case bridge and directed into the servo pin, where it acts on the cover side of the piston. When the case pin bore begins to wear, this apply oil starts to leak into the barrel region of the case. This leakage adversely impacts shift timing and the pressure applied by the servo/band. On the other hand, servo release pressure is routed through the case and into the spring side of the piston. As the pin bore wear intensifies, release oil may cross-leak into the apply circuits and exhaust at the shift valves. In reverse gear, both servos receive charge from the release side; hence, pin bore wear can lead to delayed reverse engagement. The 5R55N, 5R55W, and 5R55S models are susceptible to fluid foaming in the sump due to excessive exhaust and valve body wear, causing fluid to escape through the vent and leading to inaccurate fill indicators. A highly wear-resis