Page 3447 of 5267
6. Install Piston Installer 8504 (1) into the input clutch
retainer and onto the input clutch hub to guide the
inner and outer underdrive piston seals into posi-
tion.
7. Install the underdrive piston into the input clutch
retainer and over the input clutch hub.
8. Install the UD/OD balance piston return spring pack
into the input clutch retainer.
9. Install Piston Installer 8252 (1) into the input clutch
retainer to guide the UD/OD balance piston seal
into position inside the underdrive piston.
10. Install the UD/OD balance piston (3) into the input
clutch retainer and the underdrive piston.
11. Using Spring Compressor 8251 (2), compress the
UD/OD return spring pack and secure the piston
in place with the snap-ring.
12. Install the underdrive clutch pack into the input
clutch retainer.
Page 3448 of 5267
13. Install the UD/OD reaction plate lower flat snap-ring (16). The correct snap-ring can be identified by the two
tabbed ears.
14. Install the UD/OD reaction plate (15) into the input clutch retainer. The reaction plate is to be installed with the
big step down.
15. Install the UD/OD reaction plate upper tapered snap-ring (14) with tapered side up.
Input Clutch Assembly - Part 2
1 - THRUST BEARING NUMBER 3 10 - SNAP-RING (SELECT)
2 - OD HUB/SHAFT 11 - PLATE
3 - SNAP-RING (WAVE) 12 - DISC
4 - REV/OD REACTION PLATE 13 - OD CLUTCH
5 - THRUST BEARING NUMBER 4 14 - SNAP-RING (TAPERED)
6 - SNAP-RING (FLAT) 15 - UD/OD REACTION PLATE
7 - REVERSE HUB/SHAFT 16 - SNAP-RING (FLAT)
8 - REVERSE CLUTCH 17 - UD HUB/SHAFT
9 - REVERSE REACTION PLATE 18 - THRUST BEARING NUMBER 2
Page 3449 of 5267
16. Install the input clutch assembly into Input Clutch
PressureFixture8260(2).
17. Mount a dial indicator to the assembly, push down
on the clutch discs and zero the indicator against
the underdrive clutch discs. Apply 20 psi of air
pressure to the underdrive clutch and record the
dial indicator reading. Measure and record UD
clutch pack measurement in four (4) places, 90°
apart. Take average of four measurements and
compare with UD clutch pack clearance specifica-
tion. The correct clutch clearance is 0.84-1.54 mm
(0.033-0.061 in.). The reaction plate is not selec-
tive. If the clutch clearance is not within specifica-
tion, replace the reaction plate along with all the
friction and steel discs.
Page 3450 of 5267
18. Install the overdrive clutch pack (13) into the input clutch retainer.The overdrive steel separator plates can be
identified by the lack of the half-moon cuts in the locating tabs.
19. Install the overdrive clutch wavy snap-ring (3) with the two tabbed ears into the input clutch retainer.
20. Install the OD/reverse reaction plate (4) into the input clutch retainer. The reaction plate is non-directional.
21. Install the OD/reverse reaction plate flat snap-ring (6) into the input clutch retainer.
Input Clutch Assembly - Part 2
1 - THRUST BEARING NUMBER 3 10 - SNAP-RING (SELECT)
2 - OD HUB/SHAFT 11 - PLATE
3 - SNAP-RING (WAVE) 12 - DISC
4 - REV/OD REACTION PLATE 13 - OD CLUTCH
5 - THRUST BEARING NUMBER 4 14 - SNAP-RING (TAPERED)
6 - SNAP-RING (FLAT) 15 - UD/OD REACTION PLATE
7 - REVERSE HUB/SHAFT 16 - SNAP-RING (FLAT)
8 - REVERSE CLUTCH 17 - UD HUB/SHAFT
9 - REVERSE REACTION PLATE 18 - THRUST BEARING NUMBER 2
Page 3451 of 5267

22. Mount a dial indicator to the assembly and zero
the indicator against the OD/reverse reaction plate
(2). Apply 20 psi of air pressure to the overdrive
clutch and record the dial indicator reading. Mea-
sure and record OD clutch pack measurement in
four (4) places, 90° apart. Take average of four
measurements and compare with OD clutch pack
clearance specification.Verify that the clutch clear-
ance is 1.103-1.856 mm (0.043-0.073 in.). The
reaction plate is not selective. If the clutch clear-
ance is not within specification, replace the reac-
tion plate along with all the friction and steel
discs.
23. Install the reverse clutch pack into the input clutch retainer.
24. Install the reverse reaction plate into the input clutch retainer.
25. Install the reverse reaction plate selective snap-ring into the inputclutch retainer.
26. Mount a dial indicator to the assembly, push down
on the clutch discs, pull up on the reaction plate
to ensure the plate is properly seated and zero
the indicator against the reverse clutch discs (2).
Apply20psiofairpressuretothereverseclutch
and record the dial indicator reading. Measure
and record Reverse clutch pack measurement in
four (4) places, 90° apart. Take average of four
measurements and compare with Reverse clutch
pack clearance specification. The correct clutch
clearance is 0.81-1.24 mm (0.032-0.049 in.).
Adjust as necessary. Install the chosen snap-ring
and re-measure to verify selection.
Page 3452 of 5267

27. Remove the reverse clutch pack (8) from the input clutch retainer.
28. Install the number 2 thrust bearing (18) onto the underdrive hub (17) with outer race against the hub with petro-
leum jelly.
29. Install the underdrive hub (17) into the input clutch retainer.
30. Install the number 3 thrust bearing (1) into the overdrive hub (2) with the outer race against the hub with petro-
leum jelly.
31. Install the overdrive hub (2) into the input clutch retainer.
32. Install the number 4 thrust bearing (5) into the reverse hub with outer race against the hub with petroleum jelly.
33. Install the reverse hub (7) into the input clutch retainer.
34. Install the complete reverse clutch pack (8).
35. Install the reverse reaction plate (9) and snap-ring (10).
36. Push up on reaction plate to allow reverse clutch to move freely.
Input Clutch Assembly - Part 2
1 - THRUST BEARING NUMBER 3 10 - SNAP-RING (SELECT)
2 - OD HUB/SHAFT 11 - PLATE
3 - SNAP-RING (WAVE) 12 - DISC
4 - REV/OD REACTION PLATE 13 - OD CLUTCH
5 - THRUST BEARING NUMBER 4 14 - SNAP-RING (TAPERED)
6 - SNAP-RING (FLAT) 15 - UD/OD REACTION PLATE
7 - REVERSE HUB/SHAFT 16 - SNAP-RING (FLAT)
8 - REVERSE CLUTCH 17 - UD HUB/SHAFT
9 - REVERSE REACTION PLATE 18 - THRUST BEARING NUMBER 2
Page 3453 of 5267

SENSOR-INPUT SPEED
DESCRIPTION
The Input and Output Speed Sensors are two-wire magnetic pickup devices that generate AC signals as rotation
occurs. They are mounted in the left side of the transmission case and are considered primary inputs to the Trans-
mission Control Module (TCM).
OPERATION
The Input Speed Sensor provides information on how fast the input shaft is rotating. As the teeth of the input clutch
hub pass by the sensor coil, an AC voltage is generated and sent to the TCM. The TCM interprets this information
as input shaft rpm.
The Output Speed Sensor generates an AC signal in a similar fashion, thoughitscoilisexcitedbyrotationofthe
rear planetary carrier lugs. The TCM interprets this information as outputshaftrpm.
The TCM compares the input and output speed signals to determine the following:
Transmission gear ratio
Speed ratio error detection
CVI calculation
The TCM also compares the input speed signal and the engine speed signal to determine the following:
Torque converter clutch slippage
Torque converter element speed ratio
REMOVAL
1. Raise vehicle.
2. Place a suitable fluid catch pan under the transmis-
sion.
3. Remove the wiring connector from the input speed
sensor (3).
4. Remove the bolt holding the input speed sensor to
the transmission case.
5. Remove the input speed sensor (3) from the trans-
mission case.
Page 3457 of 5267
CLUTCH-LOW/REVERSE
DISASSEMBLY
1. Remove the inner overrunning clutch snap-ring (13) from the low/reverse clutch retainer (5).
2. Remove the outer low/reverse reaction plate flat snap-ring (1).
3. Remove the low/reverse clutch (3, 4) and the overrunning clutch (12) from the low/reverse clutch retainer (5) as
an assembly.
4. Separate the low/reverse clutch (3, 4) from the overrunning clutch (12).
Low/Reverse Clutch Assembly
1 - SNAP-RING (SELECT) 8 - SEAL
2 - REACTION PLATE 9 - BELLEVILLE SPRING
3 - DISC 10 - RETAINER
4 - PLATE 11 - SNAP-RING
5 - L/R CLUTCH RETAINER 12 - OVERRUNNING CLUTCH
6 - SEAL 13 - SNAP-RING
7-PISTON