Automatic Transmission

Component Location

Overview

This automatic transmission is a 6-speed transmission with electronic shift control. It is designed for operation in a transverse powertrain for FWD and AWD vehicles.

This transmission has the following features:

• Six forward speeds
• Torque converter with an integral converter clutch
• Electronic shift and pressure controls
• Three planetary gearsets
• Three fixed multi-disc clutches
• Two multi-plate drive clutches

All hydraulic functions are directed by electronic solenoids to control the following:

• Engagement feel
• Shift feel
• Shift scheduling
• Modulated TCC applications

This transmission has a main control which contains:

• Solenoid body with TFT sensor
• Upper Valve body
• Lower Valve body

This automatic transmission is an electronically controlled transmission. Gear selection is achieved by the control of transmission fluid flow to operate various internal clutches. The PCM operates the electrical components and provides control of gear selection shift pressure, which increases refinement and torque converter slip.

In the event of a system fault, the PCM also provides for Failure Mode Effect Management to maintain maximum functional operation of the transmission with a minimum power reduction. In the event of a total loss of control or electrical power, the basic transmission functions P, R, N and D are retained. Also 5th gear is retained by the hydraulic system.

Identification Tags

Identification Tag Location

Transmission Identification Tag

Original Solenoid Body Tag

Replacement Solenoid Body Tag

Solenoid Body Identification Tag

System Operation

Park

 Park Clutch Application Chart

H = Holding

 Park Position Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• With the selector lever in PARK, the low/reverse clutch holds the rear planetary carrier/center ring gear stationary.
• The park pawl holds the rear ring/front planetary carrier stationary.
• The turbine shaft drives the center sun gear.

Reverse

 Reverse Clutch Application Chart

H = Holding

D = Driving

 Reverse Position Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• With the selector lever in REVERSE, the low/reverse clutch holds the rear planetary carrier/center ring gear stationary.
• The direct clutch drives the rear sun gear.
• The rear ring/front planetary carrier transfers torque to the output hub in a reverse direction with a ratio of 2.88.

Neutral

 Neutral Clutch Application Chart

H = Holding

 Neutral Position Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• With the selector lever in NEUTRAL, the low/reverse clutch holds the rear planetary carrier/center ring gear stationary.
• The turbine shaft drives the center sun gear.

1st Gear

NOTE: The transmission operates differently in 1st gear above and below 8 kmh (5 mph). Transmission operation is the same below 8 kmh (5 mph) and in the LOW position.

 1st Gear Above 8 kmh (5 mph) Clutch Application Chart

H = Holding

 1st Gear LOW Position and Below 8 kmh (5 mph) Clutch Application Chart

H = Holding

 1st Gear Above 8 kmh (5 mph) Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

 1st Gear LOW Position and Below 8 kmh (5 mph) Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• In first gear, the forward clutch holds the front sun gear stationary.
• The rear planetary carrier/center ring gear is held stationary by the low OWC and/or the low reverse (1, R) clutch.
• The turbine shaft transfers torque to the center sun gear. The center sun gear transfers the torque to the center planetary carrier/front ring gear. The front ring gear transfers torque to the front planetary carrier/rear ring gear and the output hub to produce a ratio of 4.48.

2nd Gear

 2nd Gear Clutch Application Chart

H = Holding

 2nd Gear Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• In second gear the forward clutch holds the front sun gear stationary.
• The intermediate clutch holds the rear sun gear stationary.
• The turbine shaft transfers torque to the center sun gear. The center sun gear transfers torque to the center ring gear/rear planetary carrier.
• The rear planetary carrier transfers the torque to the rear ring gear/front planetary carrier and the output hub to produce a gear ratio of 2.87.

3rd Gear

 3rd Gear Clutch Application Chart

H = Holding

D = Driving

 3rd Gear Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• In third gear the forward clutch holds the front sun gear stationary.
• The direct clutch drives the rear sun gear.
• Power flows from the center sun gear to the center planetary carrier/front ring gear. From there, torque is transferred to the rear ring gear/front planetary carrier.
• Power also flows from the rear sun gear to the rear ring gear/front planetary carrier.
• The two inputs to the front planetary carrier combine and transfer torque to the output hub to produce a gear ratio of 1.84.

4th Gear

 4th Gear Clutch Application Chart

H = Holding

D = Driving

 4th Gear Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• In fourth gear the forward clutch holds the front sun gear stationary.
• The overdrive clutch drives the rear planetary carrier/center ring gear.
• Power flows from turbine shaft to the center sun gear and center ring gear.
• The two inputs to the center planetary carrier combine and transfer torque to the front ring gear.
• The front ring gear transfers the torque to the front planetary carrier and onto the output hub to produce a gear ratio of 1.41.

5th Gear

 5th Gear Clutch Application Chart

D = Driving

 5th Gear Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• In fifth gear the overdrive clutch drives the rear planetary carrier/center ring gear.
• The direct clutch drives the rear sun gear.
• The turbine shaft transfers torque to the center sun gear, rear sun gear, and rear planetary carrier/center ring gear.
• The torque from the three inputs locks the three planetary gearsets which produces a gear ratio of 1 to 1

Fail-safe Mode
• Because both SSD and SSB apply the clutches they control when they are turned OFF, 5th gear is the fail-safe.

6th Gear

 6th Gear Clutch Application Chart

H = Holding

D = Driving

 6th Gear Solenoid Operation Chart

NC = Normally Closed

NH = Normally High

NL = Normally Low

Powerflow
• In sixth gear the overdrive clutch drives the rear planetary carrier/center ring gear.
• The intermediate clutch holds the rear sun gear.
• The torque from the rear planetary carrier is transferred to the rear ring gear/front planetary carrier and the output hub which produces a gear ratio of 0.74.