Overdrive (O/D) and Coast Clutch System

The O/D  and coast clutch system consists of the following:

• O/D  friction clutch assembly
• Coast clutch cylinder
• O/D  sun gear
• Coast clutch input hub
• Coast clutch friction clutch assembly
• O/D  planetary
• O/D  ring gear
• Center shaft

The O/D  clutch piston has bonded lip seals. It is installed into the piston bore, cast into the pump and held in place by the return spring. The return spring is attached to the pump with 3 bolts. The O/D  clutch separator plates and pressure plate are splined to the case. The 3 O/D  friction plates are splined to the coast clutch cylinder. The O/D  clutch assembly is positioned between the pump face and a snap ring, and installed into the case adjacent to the O/D  pressure plate. The O/D  sun gear is pressed into the coast clutch cylinder.

The coast clutch piston is also a bonded lip seal type. The coast clutch piston is installed into the coast clutch cylinder and held to the cylinder along with the clutch return spring by a snap ring. The separator plates are splined to the case.

The coast clutch pressure plate is a mechanical diode One-Way Clutch (OWC) assembly. The OWC  is splined to the coast clutch cylinder and held in with a snap ring. The coast clutch friction plates are internally splined to the coast clutch hub, which is held to the O/D  carrier by 4 bolts. Absorbing the load between the O/D  carrier and the O/D  sun gear is the "captured" thrust bearing, part of the O/D  planet assembly.

On the opposite side of the O/D  planet is a thrust bearing positioned between the carrier and the shaft. The O/D  ring gear is splined to the center shaft and retained by a snap ring. On the opposite side of the center shaft is a thrust bearing that separates it from the center support. The O/D  coast clutch system is driven clockwise by the input shaft, one end of which is splined to the torque converter cover, and the other end is splined to the O/D  carrier.