Page 1985 of 2585
(21) Install the OD clutch pack (Fig. 236).
(22) Install OD pressure plate waved snap ring
(Fig. 237). (23) Install the OD/Reverse pressure plate with
large step down (towards OD clutch pack) (Fig. 238).
(24) Install OD pressure plate flat snap ring (Fig.
239) (Fig. 240).
Fig. 236 Install Overdrive Clutch Pack
1 - CLUTCH DISC
2 - CLUTCH PLATE
Fig. 237 Install Waved Snap Ring
1 - OVERDRIVE PRESSURE PLATE WAVED SNAP RING
2 - SCREWDRIVER
Fig. 238 OD/Reverse Reaction Plate
1 - OVERDRIVE/REVERSE PRESSURE PLATE
2 - (STEP SIDE DOWN)
Fig. 239 Install Flat Snap Ring
1 - ARBOR PRESS RAM
2 - TOOL 5059A
3 - FLAT SNAP RING
21s - 124 40TE AUTOMATIC TRANSAXLERS
INPUT CLUTCH ASSEMBLY (Continued)
Page 1986 of 2585
Fig. 240 Overdrive Clutch Assembly
1 - SNAP RING
2 - OD/REVERSE PRESSURE PLATE
3 - SNAP RING (WAVE)4 - CLUTCH DISC (3)
5 - CLUTCH STEEL (2)
6 - INPUT CLUTCH ASSEMBLY
RS
40TE AUTOMATIC TRANSAXLE21s - 125
INPUT CLUTCH ASSEMBLY (Continued)
Page 1987 of 2585

(25) Measure OD clutch pack clearance. Set up
dial indicator on top of the OD/Reverse pressure
plate as shown in (Fig. 241).
(26) Zero dial indicator and apply 30 psi (206 kPa)
air pressure to the overdrive clutch hose on Tool
8391. Measure and record OD clutch pack measure-
ment in four (4) places, 90É apart. (27) Take average of four measurements and com-
pare with OD clutch pack clearance specification.
The overdrive (OD) clutch pack clearance is
1.07-3.25 mm (0.042-0.128 in.). If not within specifications, the clutch is not
assembled properly. There is no adjustment for the
OD clutch clearance. (28) Install reverse clutch pack (two frictions/one
steel) (Fig. 242). (29) Install reverse clutch reaction plate with the
flat side down towards reverse clutch (Fig. 243). (30) Tap reaction plate down to allow installation
of the reverse clutch snap ring. Install reverse clutch
snap ring (Fig. 244) (Fig. 245).
Fig. 241 Measure OD Clutch Pack Clearance
1 - DIAL INDICATOR
2 - OD/REVERSE REACTION PLATE
Fig. 242 Install Reverse Clutch Pack
1 - REVERSE CLUTCH PLATE
2 - REVERSE CLUTCH DISCS
Fig. 243 Install Reaction Plate
1 - REVERSE CLUTCH REACTION PLATE (FLAT SIDE DOWN)
Fig. 244 Install Reverse Clutch Snap Ring
1 - REVERSE CLUTCH SNAP RING (SELECT)
2 - SCREWDRIVER
3 - REVERSE CLUTCH REACTION PLATE
21s - 126 40TE AUTOMATIC TRANSAXLERS
INPUT CLUTCH ASSEMBLY (Continued)
Page 1988 of 2585
(31) Pry up reverse reaction plate to seat against
snap ring (Fig. 246).
(32) Set up a dial indicator on the reverse clutch
pack as shown in (Fig. 247).
Fig. 245 Reverse Clutch Assembly
1 - SNAP RING
2 - REACTION PLATE
3 - CLUTCH DISC (2) 4 - CLUTCH PLATE (1)
5 - INPUT CLUTCH ASSEMBLY
Fig. 246 Pry Up Reaction Plate
1 - SCREWDRIVER
2 - SNAP RING
3 - SCREWDRIVER
4 - MUST RAISE REVERSE REACTION PLATE TO RAISE SNAP
RING
Fig. 247 Measure Reverse Clutch Pack Clearance
1 - DIAL INDICATOR
2 - REVERSE CLUTCH
RS
40TE AUTOMATIC TRANSAXLE21s - 127
INPUT CLUTCH ASSEMBLY (Continued)
Page 1989 of 2585

(33) Using moderate pressure, press down and
hold (near indicator) reverse clutch disc with screw-
driver or suitable tool and zero dial indicator (Fig.
248). When releasing pressure, indicator should
advance 0.005-0.010. as clutch pack relaxes.
(34) Apply 30 psi (206 kPa) air pressure to the
reverse clutch hose on Tool 8391. Measure and record
reverse clutch pack measurement in four (4) places,
90É apart. (35) Take average of four measurements and com-
pare with reverse clutch pack clearance specification.
The reverse clutch pack clearance is 0.89-1.37
mm (0.035-0.054 in.). Select the proper reverse
clutch snap ring to achieve specifications:
REVERSE CLUTCH SNAP RING THICKNESS
4377195 1.53-1.58 mm (0.060-0.062 in.)
4412871 1.77-1.83 mm (0.070-0.072 in.)
4412872 2.02-2.07 mm (0.080-0.082 in.)
4412873 2.27-2.32 mm (0.090-0.091 in.) (36) To complete the assembly, reverse clutch and
overdrive clutch must be removed. (37) Install the #2 needle bearing (Fig. 249).
(38) Install the underdrive shaft assembly (Fig.
250).
Fig. 248 Press Down on Reverse Clutch and Zero Indicator
1 - DIAL INDICATOR
2 - REVERSE CLUTCH
Fig. 249 Install No. 2 Needle Bearing
1 - #2 NEEDLE BEARING (NOTE 3 SMALL TABS)
2 - TABS UP
Fig. 250 Install Underdrive Shaft Assembly
1 - UNDERDRIVE SHAFT ASSEMBLY
2 - #2 NEEDLE BEARING
21s - 128 40TE AUTOMATIC TRANSAXLERS
INPUT CLUTCH ASSEMBLY (Continued)
Page 1990 of 2585
(39) Install the #3 thrust washer to the underdrive
shaft assembly. Be sure five tabs are seated properly
(Fig. 251).
(40) Install the #3 thrust plate to the bottom of the
overdrive shaft assembly. Retain with petrolatum or
transmission assembly gel (Fig. 252). (41) Install the overdrive shaft assembly (Fig. 253)
(Fig. 254).
(42) Reinstall overdrive and reverse clutch as
shown. Rechecking these clutch clearances is
not necessary.
Fig. 251 Install No. 3 Thrust Washer
1 - #3 THRUST WASHER (NOTE 5 TABS)
2 - UNDERDRIVE SHAFT ASSEMBLY
Fig. 252 Install No. 3 Thrust Plate
1 - OVERDRIVE SHAFT ASSEMBLY
2 - DABS OF PETROLATUM (FOR RETENTION)
3 - #3 THRUST PLATE (NOTE 3 TABS)
Fig. 253 Install Overdrive Shaft Assembly
1 - OVERDRIVE SHAFT ASSEMBLY
2 - #3 THRUST PLATE
3 - #3 THRUST WASHER
RS 40TE AUTOMATIC TRANSAXLE21s - 129
INPUT CLUTCH ASSEMBLY (Continued)
Page 1991 of 2585
Fig. 254 Overdrive/Underdrive Shafts
1 - OVERDRIVE SHAFT
2 - #3 THRUST PLATE (3 TABS)
3 - #3 THRUST WASHER (5 TABS)4 - UNDERDRIVE SHAFT
5 - #2 NEEDLE BEARING (3 TABS)
6 - INPUT CLUTCH ASSEMBLY
21s - 130 40TE AUTOMATIC TRANSAXLERS
INPUT CLUTCH ASSEMBLY (Continued)
Page 1992 of 2585

OIL PUMP
DESCRIPTION
The oil pump is located in the pump housing inside
the bell housing of the transaxle case (Fig. 255). The
oil pump consists of an inner and outer gear, a hous-
ing, and a cover that also serves as the reaction shaft
support.
OPERATION
As the torque converter rotates, the converter hub
rotates the inner and outer gears. As the gears
rotate, the clearance between the gear teeth
increases in the crescent area, and creates a suction
at the inlet side of the pump. This suction draws
fluid through the pump inlet from the oil pan. As the
clearance between the gear teeth in the crescent area
decreases, it forces pressurized fluid into the pump
outlet and to the valve body.
DISASSEMBLY
When disassembling the transaxle it is necessary
to inspect the oil pump for wear and damage. (1) Remove the reaction shaft support bolts.
(2) Remove reaction shaft support from pump
housing (Fig. 256). (3) Remove the pump gears (Fig. 257) and check
for wear and damage on pump housing and gears. (4) Re-install the gears and check clearances. (5) Measure the clearance between the outer gear
and the pump pocket (Fig. 258). Clearance should be
0.089±0.202 mm (0.0035-0.0079 in.). (6) Measure clearance between outer gear and
crescent. Clearance should be 0.060-0.298 mm
(0.0023-0.0117 in.). (7) Measure clearance between inner gear and
crescent. Clearance should be 0.093-0.385 mm
(0.0036-0.0151 in.).
Fig. 255 Oil Pump Assembly
1 - PUMP HOUSING
2 - OUTER PUMP GEAR
3 - INNER PUMP GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT
Fig. 256 Reaction Shaft Support
1 - PUMP HOUSING
2 - REACTION SHAFT SUPPORT
3 - PUMP GEARS
Fig. 257 Oil Pump Assembly
1 - PUMP HOUSING
2 - OUTER PUMP GEAR
3 - INNER PUMP GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT
RS 40TE AUTOMATIC TRANSAXLE21s - 131