Page 1489 of 2177
ASSEMBLY
NOTE: When assembling this transaxle, always use
NEW snap rings.
NOTE: Before assembling transaxle, differential
turning torque must be measured and adjusted.
(Refer to 21 - TRANSMISSION/TRANSAXLE/MANU-
AL/DIFFERENTIAL - ADJUSTMENTS). Differential
turning torque must be measured with geartrain out
of case.
(1) Install input shaft bearing using an arbor press
and remover/installer 8474 (Fig. 47).
(2) Install shift shaft bushing to case using
installer 8475 (Fig. 48).
Fig. 46 Input Shaft Bearing Removal
1 - ARBOR PRESS
2 - DRIVER HANDLE C-4171
3 - REMOVER/INSTALLER 8474
Fig. 47 Input Shaft Bearing Installation
1 - ARBOR PRESS
2 - C-4171 DRIVER HANDLE
3 - REMOVER/INSTALLER 8474
4 - INPUT SHAFT BEARING
Fig. 48 Shift Shaft Bushing Installation
1 - INSTALLER 8475
2 - SHIFT SHAFT BUSHING
21 - 42 T850 MANUAL TRANSAXLERS
T850 MANUAL TRANSAXLE (Continued)
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Page 1490 of 2177

(3) Install intermediate shaft bearing race to case
with an arbor press, driver handle C-4171, and
installer 8471 (Fig. 49). Press until installer 8471
bottoms on transaxle case.
NOTE: If input shaft assembly was not disassem-
bled, it is necessary to remove input shaft sealed
ball bearing before assembling transaxle. (Refer to
21 - TRANSMISSION/TRANSAXLE/MANUAL/INPUT
SHAFT - DISASSEMBLY)
(4) Install assembled input and intermediate
shafts to fixture 8487 (Fig. 50).(5) Install shift forks and 3/4 rail assembly to
geartrain as shown in (Fig. 51).
NOTE: Before installing geartrain, make sure that
input shaft sealed roller bearing is not installed,
otherwise reverse idler assembly installation will be
difficult. (Refer to 21 - TRANSMISSION/TRANSAXLE/
MANUAL/INPUT SHAFT - DISASSEMBLY)
Fig. 49 Install Intermediate Shaft Bearing Race
1 - ARBOR PRESS
2 - DRIVER HANDLE C-4171
3 - INSTALLER 8471
4 - INTERMEDIATE SHAFT BEARING RACEFig. 50 Install Geartrain to Fixture 8487
1 - INTERMEDIATE SHAFT
2 - INPUT SHAFT
2 - FIXTURE 8487
RST850 MANUAL TRANSAXLE21-43
T850 MANUAL TRANSAXLE (Continued)
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Page 1491 of 2177
(6) Install lifting bar 8489 to geartrain. Install
geartrain to case.When installing geartrain to
case, use care not to damage bearing surfaces.
(7) Remove lifting bar 8489 from geartrain.
(8) Install shift 1/2-5/R rail as shown in (Fig. 52).
(9) Install reverse idler shaft into position (Fig.
53). Install and torque shaft-to-case bolt to 54 N´m
(40 ft. lbs.).
(10) Install reverse idler gear bearing (Fig. 54).
(11) Install reverse idler gear with hub down as
shown in (Fig. 55).
(12) Install flat washer (Fig. 56).
(13) Install wave washer (Fig. 57).
Fig. 51 Shift Fork/Rail Orientation
1 - 5/R FORK
2 - 3/4 RAIL ASSEMBLY
3 - 3/4 FORK
4 - 1/2 FORK
Fig. 52 Shift Rail Installation
1 - 1/2-5/R SHIFT RAIL
Fig. 53 Install Reverse Idler Shaft
1 - REVERSE IDLER SHAFT
2 - BOLT
21 - 44 T850 MANUAL TRANSAXLERS
T850 MANUAL TRANSAXLE (Continued)
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Page 1492 of 2177
Fig. 54 Install Reverse Idler Gear Bearing
1 - NEEDLE BEARING
2 - REVERSE IDLER SHAFT
Fig. 55 Install Reverse Idler Gear
1 - REVERSE IDLER GEAR
Fig. 56 Install Flat Washer
1 - FLAT WASHER
Fig. 57 Install Wave Washer
1 - WAVE WASHER
RST850 MANUAL TRANSAXLE21-45
T850 MANUAL TRANSAXLE (Continued)
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Page 1493 of 2177
(14) Install input shaft sealed roller bearing using
installer 8482 (Fig. 58).
(15) Installnewinput shaft bearing snap ring
(Fig. 59).(16) Install shift rail bushing to end cover using
installer 8475 (Fig. 60).
(17) Applya1mm(0.04 in.) bead of MopartGas-
ket Maker to transaxle end cover and install to
transaxle case (Fig. 61).While installing end
cover, be sure to guide oil trough into pocket
(Fig. 62).Torque end cover-to-case bolts to 28 N´m
(250 in. lbs.) (Fig. 63).
Fig. 58 Install Input Shaft Sealed Roller Bearing
1 - INSTALLER 8482
2 - SEALED ROLLER BEARING
Fig. 59 Input Shaft Bearing Snap Ring
1 - SNAP RING
Fig. 60 Shift Rail Bushing Installation
1 - INSTALLER 8475
Fig. 61 End Cover Removal/Installation
1 - END COVER
2 - OIL TROUGH
21 - 46 T850 MANUAL TRANSAXLERS
T850 MANUAL TRANSAXLE (Continued)
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Page 1494 of 2177
(18) Install lifting bar 8489 to geartrain.
(19) Lift up on bar (input shaft side) and install
input shaft bearing snap ring (Fig. 64).
(20) Lift up on bar (intermediate shaft side) and
install intermediate shaft bearing snap ring.
(21) Remove lifting bar 8489.
(22) Install a bead of MopartGear Lube RTV to
end plate and immediately install to case. Install and
torque bolts to 28 N´m (250 in. lbs.) (Fig. 65).
Fig. 62 Oil Trough Pocket
1 - OIL TROUGH
2 - POCKET
Fig. 63 End Cover Bolts
1 - BOLT (12)
Fig. 64 Input Bearing Snap Ring
1 - SNAP RING PLIERS
2 - LIFTING BAR 8489
3 - SNAP RING
Fig. 65 End Cover Bolts
1 - BOLT (11)
RST850 MANUAL TRANSAXLE21-47
T850 MANUAL TRANSAXLE (Continued)
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Page 1495 of 2177

(23) Install back up lamp switch and torque to 23
N´m (17 ft. lbs.) (Fig. 66).
(24) Roll transaxle assembly on side.
(25) Install differential chip collector magnet (Fig.
67). Retain to case with a dab of MopartGear Lube
RTV.
(26) Install differential assembly with bearing
races and select shim (Fig. 68). Shim selection was
determined before transaxle assembly (Refer to 21 -
TRANSMISSION/TRANSAXLE/MANUAL/DIFFER-
ENTIAL - ADJUSTMENTS).
(27) Installa1mm(0.04 in.) bead of MopartGas-
ket Maker to differential cover and install to case.
Torque differential cover-to-case bolts to 54 N´m (40
ft. lbs.).(28) Installa1mm(0.04 in.) bead of MopartGas-
ket Maker to extension housing. Install extension
housing to differential cover and case and torque
bolts to 28 N´m (250 in. lbs.) (Fig. 69).
Fig. 66 Back-Up Lamp Switch
1 - BACK-UP LAMP SWITCH
Fig. 67 Differential Magnet
1 - MAGNET
Fig. 68 Differential Shim/Slinger Orientation
1 - SLINGER
2 - BEARING RACE
3 - DIFFERENTIAL ASSEMBLY
4 - SHIM (SELECT)
Fig. 69 Extension Housing-to-Case Bolts
1 - EXTENSION HOUSING
21 - 48 T850 MANUAL TRANSAXLERS
T850 MANUAL TRANSAXLE (Continued)
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Page 1496 of 2177
(29) Install both axle output shaft seals using
driver handle C-4171 and installer 8476 (Fig. 70)
(Fig. 71).(30) Applya1mm(0.04 in.) bead of MopartGas-
ket Maker to shift cover assembly. Place shift cover
and transaxle geartrain into neutral and install shift
cover (Fig. 72) and torque bolts to 28 N´m (250 in.
lbs.).
(31) Install input shaft bearing retainer (Fig. 73).
Torque bolts to 12 N´m (105 in. lbs.).
Fig. 70 Axle Seal Installation (Extension Housing
Side)
1 - EXTENSION HOUSING
2 - SEAL
3 - INSTALLER 8476
4 - DRIVER HANDLE C-4171
Fig. 71 Axle Seal InstallationÐTypical
1 - SEAL
2 - INSTALLER 8476
3 - DRIVER HANDLE C-4171
Fig. 72 Shift Cover Removal/Installation
1 - SHIFT COVER ASSEMBLY
Fig. 73 Input Bearing Retainer
1 - INPUT BEARING RETAINER
RST850 MANUAL TRANSAXLE21-49
T850 MANUAL TRANSAXLE (Continued)
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