Page 3305 of 4284
SPECIAL TOOLS
SPECIAL TOOLS - T850 TRANSAXLE
Bearing Splitter, P-334
Slide Hammer, C-3752
Universal Handle, C-4171
Torque Tool, C-4995
Puller Set, 5048
Disconnect Tool, 6638A
Remover/Installer, 6891
RGT850 MANUAL TRANSAXLE21a-39
T850 MANUAL TRANSAXLE (Continued)
Page 3306 of 4284
Alignment Pins, 8470
Installer, 8471
Race Remover, 8472
Bearing Installer, 8473
Remover/Installer, 8474
Installer, 8475
Installer, 8476
Wrench, 8478
21a - 40 T850 MANUAL TRANSAXLERG
T850 MANUAL TRANSAXLE (Continued)
Page 3307 of 4284
Stake Tool, 8479
Installer, 8481
Bearing Installer, 8482
Fixture, 8483
Remover, 8486
Fixture, 8487
Lifting Bar, 8489
Thrust Buttons, 8491
RGT850 MANUAL TRANSAXLE21a-41
T850 MANUAL TRANSAXLE (Continued)
Page 3308 of 4284

AXLE SEALS
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove one or both front halfshaft assemblies.
(Refer to 3 - DIFFERENTIAL & DRIVELINE/HALF
SHAFT - REMOVAL)
(3) Using a suitable screwdriver, remove one or
both axle seals (Fig. 100).
INSTALLATION
(1) Using driver handle C-4171 and installer 8476,
install axle seals into position (Fig. 101) (Fig. 102).
(2) Install one or both front halfshaft assemblies.
(Refer to 3 - DIFFERENTIAL & DRIVELINE/HALF
SHAFT - INSTALLATION)
(3) Check transaxle fluid level and adjust if neces-
sary. (Refer to 21 - TRANSMISSION/TRANSAXLE/
MANUAL/FLUID - STANDARD PROCEDURE)
(4) Lower vehicle.
Fig. 100 Axle Seal Removal (Extension Housing
Side Shown)
1 - SCREWDRIVER
2 - AXLE SEAL
3 - EXTENSION HOUSING
Fig. 101 Axle Seal Installation
1 - SEAL
2 - INSTALLER 8476
3 - DRIVER HANDLE C-4171
Fig. 102 Axle Seal Installation (Extension Housing
Side)
1 - EXTENSION HOUSING
2 - SEAL
3 - INSTALLER 8476
4 - DRIVER HANDLE C-4171
21a - 42 T850 MANUAL TRANSAXLERG
Page 3309 of 4284

BACK-UP LAMP SWITCH
REMOVAL
(1) Raise vehicle on hoist.
(2) Disconnect back-up lamp switch connector.
(3) Remove back-up lamp switch (Fig. 103).
INSTALLATION
(1) Install back-up lamp switch (Fig. 103) and
torque to 23 N´m (17 ft. lbs.).
(2) Connect back-up lamp switch connector.
(3) Lower vehicle.
DIFFERENTIAL
DESCRIPTION
The T850 differential is a conventional open
design. It consists of a ring gear and a two-piece dif-
ferential case. The differential case contains the pin-
ion and side gears, three floating pinion shafts, and a
pinion shaft retaining ring (Fig. 104). The differential
case is supported in the transaxle by tapered roller
bearings.
OPERATION
The differential assembly is driven by the interme-
diate shaft via the ring gear. The ring gear drives the
differential case, and the case drives the halfshafts
through the differential gears. The differential pinion
and side gears are supported in the case by pinion
shafts and thrust washers. Differential pinion and
side gears make it possible for front wheels to rotate
at different speeds while cornering.
Fig. 103 Back-Up Lamp Switch
1 - BACK-UP LAMP SWITCH
Fig. 104 Differential Assembly
1 - RING GEAR
2 - SUPPORT PLATE
3 - SIDE GEAR (2)
4 - PINION GEAR (4)
5 - BOLT (12)
6 - PINION SHAFT (2-SHORT)
7 - PINION SHAFT (1-LONG)
8 - THRUST WASHER (2)
9 - RETAINING RING
10 - DIFFERENTIAL CASE
RGT850 MANUAL TRANSAXLE21a-43
Page 3310 of 4284
DISASSEMBLY
(1) Remove differential side bearings:
(a) Install button 8491-1 to differential case (Fig.
105).
(b) Set up Tool 5048 (5048-1, -4, -6) as shown in
(Fig. 106).
(c) Remove differential side bearing (Fig. 107).
Same procedure/tools work for both sides.
(2) Remove ring gear-to-case bolts (Fig. 108) and
remove ring gear.
Fig. 105 Tool 8491
1 - TOOL 8491
Fig. 106 Puller 5048
1 - 5048-1 FORCING SCREW
2 - 5048-4 COLLETS
3 - 5048-6 SLEEVE
Fig. 107 Differential Side Bearing Removal
1 - TOOL 5048
Fig. 108 Ring Gear-to-Differential Case Bolts
1 - BOLT (12)
2 - DIFFERENTIAL SUPPORT
3 - RING GEAR
21a - 44 T850 MANUAL TRANSAXLERG
DIFFERENTIAL (Continued)
Page 3311 of 4284
(3) Using three ring gear bolts as forcing screws
(Fig. 109), separate differential support from case
(Fig. 110).(4) Remove side gear thrust washer (Fig. 111).
(5) Remove side gear (Fig. 112).
Fig. 109 Separate Differential Case Halves
1 - BOLT (3)
2 - DIFFERENTIAL CASE
3 - DIFFERENTIAL SUPPORT
Fig. 110 Differential Support Plate
1 - DIFFERENTIAL SUPPORT PLATE
2 - DIFFERENTIAL CASE
Fig. 111 Side Gear Thrust Washer
1 - SIDE GEAR THRUST WASHER
2 - DIFFERENTIAL SIDE GEAR
Fig. 112 Differential Side Gear
1 - DIFFERENTIAL SIDE GEAR
RGT850 MANUAL TRANSAXLE21a-45
DIFFERENTIAL (Continued)
Page 3312 of 4284
(6) Remove long pinion shaft (Fig. 113).
(7) Remove both short pinion shafts (Fig. 114).(8) Remove pinion shaft retainer (Fig. 115).
(9) Remove four pinion gears and thrust washers
(Fig. 116).
Fig. 113 Long Pinion Shaft
1 - PINION SHAFT (LONG)
Fig. 114 Short Pinion Shaft (2)
1 - PINION SHAFT (SHORT (2))
Fig. 115 Pinion Shaft Retaining Ring
1 - RETAINING RING
Fig. 116 Pinion Gear and Thrust Washer
1 - THRUST WASHER (4)
2 - PINION GEAR (4)
21a - 46 T850 MANUAL TRANSAXLERG
DIFFERENTIAL (Continued)