Apply Components

Apply Components
The following information describes the operation of the 2 one-way clutches (OWC).

Overdrive One-Way Clutch (OWC) Mechanical diode
The overdrive one-way clutch (OWC) mechanical diode is a OWC which also acts as the coast clutch pressure plate. It provides direct drive through the overdrive gearset when in power on mode. It overruns in power OFF mode or when the overdrive clutch is applied.

Engine torque is transmitted in 1st, 3rd and 5th gears while the range selector lever is in the (D) position. The input shaft drives the overdrive carrier clockwise. The overdrive carrier has the coast clutch hub bolted to it which also turns clockwise. The overdrive sun gear would turn counterclockwise, but is held from turning by the coast clutch mechanical diode. The input shaft turns the same speed as the center shaft and transmits torque through it.

In 2nd, 4th and 6th gears, the overdrive clutch is applied, the mechanical diode overruns and holds the overdrive sun gear fixed to the case. This causes the overdrive planet to walk around the sun gear and over-drive the overdrive ring gear.

Mechanical diodes are model dependent. The higher rpm of the gasoline engines require a mechanical diode unique from that used on higher torque diesel engines.

Overdrive One-Way Clutch Mechanical diode:

Low/Reverse Mechanical diode
The low/reverse clutch mechanical diode is a one-way clutch (OWC) which also functions as the low/reverse clutch pressure plate. The low/reverse mechanical diode has fewer external splines than the coast clutch mechanical diode. The low/reverse mechanical diode external splines mate with the case and the internal splines mate with the reverse ring gear/reverse planet assembly.

In 1st and 2nd gears, the center shaft drives the forward cylinder clockwise. The forward clutch is applied and holds the forward ring gear, driving it clockwise. The forward planet provides a counterclockwise resisting torque and the forward/reverse sun gear is driven counterclockwise. The low reverse clutch is released. The low/reverse mechanical diode holds the reverse planet carrier body and allows the forward/reverse sun gear to drive the reverse planet gears which in turn drive the output shaft ring gear and hub assembly. The forward planet and output shaft hub are both splined to the output shaft.

Low/Reverse Mechanical diode - One-Way Clutch (Part 1):

Low/Reverse Mechanical diode - One-Way Clutch (Part 2):

Mechanical diodes are model dependent. The higher rpm of the gasoline engines require a mechanical diode unique from that used on higher torque diesel engines.