Component Description
Planetary Gearset
This transmission has 3 planetary gearsets to provide operation in reverse and 6 forward speeds.
The gearsets are comprised of the following components:
- Front planetary sun gear (part of the front sun gear and shell assembly)
- Front planetary carrier
- Front planetary ring gear
- Center planetary sun gear
- Center planetary carrier
- Center planetary ring gear
- Rear planetary ring gear
- Rear planetary carrier
- Rear planetary sun gear and shell assembly
The front planetary sun gear is splined to the forward (1, 2, 3, 4) clutch and is held stationary in 1st, 2nd, 3rd and 4th gears.
The front planetary carrier is splined to the rear planetary ring gear and transfers power from the rear planetary gearset to the front planetary gearset in 2nd, 3rd, 5th and 6th gears and reverse. The front planetary carrier is splined to the drive chain drive sprocket. The front planetary carrier is the output component for the planetary gearset.
The front planetary ring gear is splined to the center planetary carrier and transfers power from the center planetary gearset to the front planetary gearset in 1st, 2nd, 3rd and 4th gears.
The center planetary sun gear is splined to the input shaft and is used as input to the planetary gearsets in 1st, 2nd, 3rd and 4th gear.
The center planetary ring gear is splined to the rear planetary carrier and transfers power from the center planetary gearset to the rear planetary gearset in 3rd gear, from the rear planetary gearset to the center planetary gearset in 4th gear and is held stationary by the low OWC and low/reverse clutch in 1st gear and reverse.
The rear planetary carrier is splined to the O/D (4, 5, 6) clutch hub and transfers power from the input shaft to the rear planetary carrier in 4th, 5th and 6th gears.
The rear planetary sun gear and shell assembly is splined to both the intermediate (2, 6) clutch and the direct (3, 5, R) clutch. The rear planetary sun gear and shell assembly is held stationary by the intermediate (2, 6) clutch in 2nd and 6th gear and is driven by the direct (3, 5, R) clutch in 3rd and 5th gears and reverse.
Planetary Gearset Cutaway View
Planetary Gearset Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7A019 | Front planetary sun gear and shell assembly |
| 2 | 7D491 | Front planetary carrier/rear planetary ring gear assembly |
| 3 | 7D063 | Gear - center planetary sun |
| 4 | 7D491 | Center planetary carrier/front ring gear assembly |
| 5 | 7D491 | Rear planetary carrier/center ring gear assembly |
| 6 | 7A019 | Rear planetary sun gear and shell assembly |
Input Shaft
The input shaft is part of the direct/O/D clutch assembly and is splined to the torque converter turbine and the center planetary sun gear. The input shaft transfers power from the torque converter to the rear planetary gearset through the center planetary sun gear and the direct (3, 5, R) and O/D (4, 5, 6) clutches.
Input Shaft Cutaway View
Input Shaft Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7G384 | Direct (3, 5, R)/ O/D (4, 5, 6) clutch hub |
| 2 | 7F213 | Input shaft |
| 3 | 7B164 | Direct (3, 5, R) clutch |
| 4 | 7B164 | O/D (4, 5, 6) clutch |
| 5 | 7D491 | Center planetary sun gear |
Front Planetary Carrier Hub (Output Hub)
The front planetary carrier hub/park gear is splined to the front planetary carrier and the drive chain drive sprocket. This allows torque to be transferred from the planetary gearset to the final drive gearset.
Front Planetary Carrier Hub Cutaway View
Front Planetary Carrier Hub Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7D491 | Front planetary carrier |
| 2 | 7060 | Front planetary carrier hub/park gear |
| 3 | 7G132 | Drive chain drive sprocket |
Final Drive Chain, Sprockets and Planetary Gearset
The final drive consists of a drive chain and sprockets and a planetary gearset and differential assembly. The drive chain and sprockets transfer torque from the front planetary carrier hub to the differential assembly that has a planetary gearset integrated into it for final drive torque multiplication.
The final drive consists of the following components:
- Drive sprocket
- Drive chain
- Driven sprocket
- Final drive sun gear
- Final drive ring gear
- Final drive planetary carrier and differential assembly
Final Drive Component Cutaway View
Final Drive Component Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7G132 | Drive chain drive sprocket |
| 2 | 7G249 | Drive chain |
| 3 | 7G132 | Drive chain driven sprocket |
| 4 | 7F342 | Final drive planetary sun gear |
| 5 | 7F465 | Differential assembly |
| 6 | 7F343 | Final drive planetary ring gear |
| 7 | 7975 | Torque converter housing |
Differential
The differential allows the halfshafts and wheels to rotate at different speeds during cornering.
The differential assembly consists of the following components:
- Differential case (part of the final drive carrier)
- Two pinion gears supported by a pinion shaft
- Two side gears supported by the differential case and halfshafts
When driving in a straight line, both front wheels rotate at relatively the same speed. This means both side gears are rotating at the same speed, as well, while both pinion gears revolve (but do not rotate) with the side gears. During cornering, the wheel on the outside of the turn is forced to rotate faster than the wheel on the inside of the turn. Since the side gears must now rotate at different speeds, the pinion gears rotate on the pinion shaft allowing the drive axles to rotate at different speeds while still transferring output torque.
Differential Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7F465 | Differential housing |
| 2 | - | Pinion shaft |
| 3 | - | Pinion gears |
| 4 | - | Side gears |
Differential Cutaway View and External Sealing
| Item | Part Number | Description |
|---|---|---|
| 1 | 1177 | LH halfshaft seal |
| 2 | 1177 | RH halfshaft seal |
Forward (1, 2, 3, 4) Clutch
The forward clutch is a brake clutch that holds the front sun gear and shell assembly. The forward clutch is applied in 1st, 2nd, 3rd and 4th gears.
Hydraulic pressure from the regulator valve in the valve body pushes the forward clutch piston against the forward clutch pack to apply the clutch. The front sun gear and shell assembly is held stationary to the transmission case as a result of the clutch being applied.
Forward (1, 2, 3, 4) Clutch Cutaway View
Forward (1, 2, 3, 4) Clutch Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7005 | Transmission case |
| 2 | 7L328 | Center support |
| 3 | 7A262 | Forward clutch piston |
| 4 | 7B070 | Forward clutch piston return spring |
| 5 | 7H365 | Forward clutch piston return spring snap ring |
| 6 | 7B070 | Forward clutch wave spring |
| 7 | 7B164 | Forward (1, 2, 3, 4) clutch |
| 8 | 7B066 | Forward clutch pressure plate |
| 9 | 7D483 | Forward clutch snap ring |
| 10 | 7A019 | Front sun gear and shell assembly |
Direct (3, 5, R) Clutch
The direct clutch is a drive clutch that transfers power from the direct/O/D clutch hub assembly to the rear planetary sun gear and shell assembly. The direct clutch is applied in 3rd and 5th gears and reverse.
Hydraulic pressure from the regulator valve in the valve body pushes the direct clutch piston against the direct clutch pack to apply the clutch. The input shaft and direct/O/D clutch hub assembly transfers torque to the rear planetary sun gear and shell assembly as a result of the clutch being applied.
Direct (3, 5, R) Clutch Cutaway View
Direct (3, 5, R) Clutch Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7C122 | Direct clutch cylinder snap ring |
| 2 | 7F283 | Direct clutch cylinder |
| 3 | 7A262 | Direct clutch piston |
| 4 | 7F235 | Direct clutch piston return spring |
| 5 | 7C099 | Direct clutch piston seals |
| 6 | 7G384 | Direct/O/D clutch hub |
| 7 | 7F213 | Input shaft |
| 8 | 7B070 | Direct clutch wave spring |
| 9 | 7B164 | Direct (3, 5, R) clutch assembly |
| 10 | 7B066 | Direct clutch pressure plate |
| 11 | 7D483 | Direct clutch snap ring |
| 12 | 7A019 | Rear planetary sun gear and shell assembly |
Intermediate (2, 6) Clutch
The intermediate clutch is a brake clutch that holds the rear planetary sun gear and shell assembly. The intermediate clutch is applied in 2nd and 6th gears.
Hydraulic pressure from the regulator valve in the valve body pushes the intermediate clutch piston against the intermediate clutch pack to apply the clutch. The low OWC works as a pressure plate for the intermediate (2, 6) clutch. The rear planetary sun gear and shell assembly is held stationary to the transmission case as a result of the clutch being applied.
Intermediate (2, 6) Clutch Cutaway View
Intermediate (2, 6) Clutch Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7005 | Transmission case |
| 2 | 7E005 | Intermediate clutch piston |
| 3 | 7B070 | Intermediate clutch piston return spring |
| 4 | 7D483 | Intermediate clutch piston return spring snap ring |
| 5 | 7E005 | Intermediate clutch apply ring |
| 6 | 7A019 | Rear planetary sun gear and shell assembly |
| 7 | 7E085 | Intermediate clutch wave spring |
| 8 | 7B164 | Intermediate clutch assembly |
| 9 | 7A089 | Low/OWC |
Low - Reverse Clutch
The low/reverse clutch is a brake clutch that holds the low OWC which is splined to the rear planetary carrier. The low/reverse clutch is applied in manual LOW, REVERSE and 1st gear up to 8 km/h (5 mph).
Hydraulic pressure from the regulator valve in the valve body pushes the low/reverse clutch piston against the low/reverse clutch pack to apply the clutch. The rear planetary carrier is held stationary to the transmission case as a result of the clutch being applied.
Low/Reverse Clutch Cutaway View
Low/Reverse Clutch Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7005 | Transmission case |
| 2 | 7A089 | Low OWC |
| 3 | 7D491 | Rear planetary carrier |
| 4 | 7B066 | Low/reverse clutch pressure plate |
| 5 | 7B164 | Low/reverse clutch |
| 6 | 7E085 | Low/reverse clutch wave spring |
| 7 | 7C122 | Low/reverse clutch piston return spring snap ring |
| 8 | 7B070 | Low/reverse clutch piston return spring |
| 9 | 7D402 | Low/reverse clutch piston |
| 10 | 7L328 | Center support |
Overdrive Clutch
The O/D clutch is a drive clutch that transfers power from the direct/O/D clutch hub assembly to the rear planetary carrier. The O/D clutch is applied in 4th, 5th and 6th gears.
Hydraulic pressure from the regulator valve in the valve body pushes the O/D clutch piston against the O/D clutch pack to apply the clutch. The input shaft and direct/O/D clutch hub assembly transfers torque to the rear planetary carrier as a result of the clutch being applied.
Overdrive (O/D) (4, 5, 6) Clutch Cutaway View
Overdrive (O/D) (4, 5, 6) Clutch Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7G384 | Direct/O/D clutch hub assembly |
| 2 | 7A548 | O/D clutch piston inner seal |
| 3 | 7F213 | Input shaft |
| 4 | 7A548 | O/D clutch piston outer seals |
| 5 | 7A262 | O/D clutch piston |
| 6 | 7F222 | O/D clutch piston return spring |
| 7 | 7H360 | O/D clutch balance piston |
| 8 | 7C122 | O/D clutch balance piston snap ring |
| 9 | 7B164 | O/D (4, 5, 6) clutch assembly |
| 10 | 7B066 | O/D clutch pressure plate |
| 11 | 7D483 | O/D clutch snap ring |
| 12 | 7H351 | O/D clutch hub |
| 13 | 7D491 | Rear planetary carrier |
Low One way Clutch
The low OWC is a brake clutch that holds the rear planetary carrier in one direction and allows it to freewheel in the opposite direction which eliminates engine braking in 1st gear when the transmission is in DRIVE. The low OWC is also the pressure plate for the intermediate (2, 6) clutch.
Low OWC Cutaway View
Low OWC Exploded View
| Item | Part Number | Description |
|---|---|---|
| 1 | 7005 | Transmission case |
| 2 | 7A089 | Low OWC |
| 3 | 7D491 | Rear planetary carrier |