Jeep Liberty KJ. Manual — part 1202
The Low/Reverse clutch is located at the rear of the transmission case.
OPERATION
2C CLUTCH
The 2C clutch is hydraulically applied in second and fifth gear by pressurized fluid against the 2C piston. When the
2C clutch is applied, the reverse sun gear assembly is held or grounded to the transmission case by holding the
reaction planetary carrier.
4C CLUTCH
The 4C clutch is hydraulically applied in second prime and fourth gear by pressurized fluid against the 4C clutch
piston. When the 4C clutch is applied, the reaction annulus gear is held or grounded to the transmission case.
LOW/REVERSE CLUTCH
The Low/Reverse clutch is hydraulically applied in park, reverse, neutral, and first gear, only at low speeds, by pres-
surized fluid against the Low/Reverse clutch piston. When the Low/Reverse clutch is applied, the input annulus
assembly is held or grounded to the transmission case.
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ASSEMBLY-INPUT CLUTCH
DESCRIPTION
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Three hydraulically applied input clutches are used to drive planetary components. The underdrive, overdrive, and
reverse clutches are considered input clutches and are contained within the input clutch assembly.
The input clutch assembly also contains:
•
Input shaft
•
Input hub
•
Clutch retainer
•
Underdrive piston
•
Overdrive/reverse piston
•
Overdrive hub
•
Underdrive hub
OPERATION
The three input clutches are responsible for driving different components of the planetary geartrain.
UNDERDRIVE CLUTCH
The underdrive clutch is hydraulically applied in first, second, second prime, and third (direct) gears by pressurized
fluid against the underdrive piston. When the underdrive clutch is applied, the underdrive hub drives the input sun
gear.
OVERDRIVE CLUTCH
The overdrive clutch is hydraulically applied in third (direct), fourth, and fifth gears by pressurized fluid against the
overdrive/reverse piston. When the overdrive clutch is applied, the overdrive hub drives the reverse carrier/input
annulus assembly.
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REVERSE CLUTCH
The reverse clutch is hydraulically applied in reverse gear by pressurized fluid against the overdrive/reverse piston.
When the reverse clutch is applied, the reaction annulus gear is driven.
DISASSEMBLY
NOTE: If the input clutch assembly is being reconditioned (clutch/seal replacement) or replaced, it is nec-
essary to perform the Quick Learn Procedure using the scan tool (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/TRANSMISSION CONTROL MODULE - STANDARD PROCEDURE).
1. Remove the reverse reaction plate selective snap-ring (10) from the input clutch retainer (13).
2. Remove the reverse reaction plate (9) from the input clutch retainer.
3. Remove the reverse hub (7) and reverse clutch pack (8) from the input clutch retainer.
4. Remove the number 4 thrust bearing (5) from the overdrive hub (2).
5. Remove the overdrive hub (2) from the input clutch retainer.
6. Remove the number 3 thrust bearing (1) from the underdrive hub (17).
7. Remove the OD/reverse reaction plate snap-ring (6) from the input clutch retainer.
8. Remove the underdrive hub (17), overdrive clutch (13), and overdrive reaction plate (15) from the input clutch
retainer.
NOTE: The overdrive friction discs and steel discs are thicker than the matching components in the under-
drive and reverse clutches.
9. Remove the number 2 thrust bearing (18) from the input clutch hub.
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