Page 4721 of 6020
7B1-2 Manual Transmission (MUX)
General Description
General Description
MUX5S Transmission(4x2 model)
RTW77BMF000701
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Page 4722 of 6020
Manual Transmission (MUX) 7B1-3
MUX5S Transmission(4x4 model)
The MUX5S is a constant mesh transmission,
synchronized in all speeds.
The transmission is designed for a reduction of the shift
effort and the quietest possible operation.
Principle parts of the transmission are the clutch
housing, the front case, the intermediate plate, the rear
case, the end cover, and the gears.
The transmission control box is built into the
transmission.
RTW77BMF000601
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Page 4723 of 6020

7B1-4 Manual Transmission (MUX)
Troubleshooting
ConditionPossible Cause Correction
Abnormal Noise (Noisy in Neutral) Insufficient or improper lubricant Replenish or replace lubricant Flywheel pilot bearing worn or
broken Replace flywheel pilot bearing
Bearing(s) worn or broken (Input
shaft, counter shaft, and output
shaft) Replace bearing(s)
Gear tooth contact surfaces worn or
scuffed (Input shaft, counter shaft,
output shaft, and reverse idler gear) Replace gear(s)
Spline worn (Input shaft, output
shaft, counter shaft, and
synchronizer clutch hub) Replace worn parts
Transmission misalignment Realign transmission
Abnormal Noise (Noisy Operation) Insufficient or improper lubricant (Metallic rattling) Replenish or replace lubricant
Bearing(s) worn or broken (Hissing,
thumping, or bumping) Replace bearing(s)
Gear(s) worn, chipped, or cracked
(Growling, humming, or grinding) Replace gear(s)
Gears seizing on thrust face or
inner face free running (Squealing
at high speeds) Replace gear(s)
Gears lack of backlash between
meshing (Gear whining) Replace gear(s)
Hard Shifting Insufficient or improper lubricant Replenish or replace lubricant
Improper clutch pedal free play Readjust clutch pedal free play
Hard operating of change lever
caused insufficient grease Repair or regrease change lever
assembly
Change lever sliding portions worn Repair or replace applicable parts and regrease
Shift block sleeve movement failure Repair or replace sleeve
Shift rod and/or quadrant box
sliding face worn Replace worn parts
Shift arm and/or synchronizer
sleeve groove worn Replace worn parts
Collar, and/or gear thrust faces
worn (Input shaft and counter shaft
thrust play) Replace worn parts
Synchronizer parts worn Replace worn parts
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Page 4724 of 6020

Manual Transmission (MUX) 7B1-5
Main Specifications
Walking or Jumping Out of Gear Change lever sliding portion wornand excessive playReplace worn parts
Shift rod and/or quadrant box
sliding faces worn Replace worn parts
Shift arm and synchronizer sleeve
groove worn Replace worn parts
Collar and/or gear thrust faces worn
(Input shaft and counter shaft thrust
play) Replace worn parts
Bearing worn or broken (Input shaft,
counter shaft, and individual gears) Replace bearing(s)
Input shaft spline, output shaft
spline, and synchronizer clutch hub
splines worn Replace input shaft, output shaft,
and synchronizer clutch hub
Synchronizer parts worn or broken Replace worn or broken parts
Taper bolt slack Replace taper bolt
Oil Leakage Oil level too high Drain oil to correct level Improper lubricant Replace lubricant
Drain plug and/or filler plug loose Tighten plug and replenish lubricant
Defective or improperly installed
gasket (s) Replace gasket(s)
Front oil seal worn or scratched Replace oil seal
Rear oil seal worn or scratched Replace oil seal
Model MUX5S
Transmission Type Fully synchronized forward and reverse gears
Control method Remote control with the gear shift lever on the floor
Gear ratio 1st 4.326
2nd 2.557
3rd 1.490
4th 1.000
5th 0.790
Revese 3.942
Transmission oil capacity 3.0 lit. (3.17 US qt)
Type of lubricant BESCO TRANS AXLE OIL (5W-30 SF)
Condition
Possible Cause Correction
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Page 4725 of 6020
7B1-6 Manual Transmission (MUX)
Fixing Torque
Legend
RTW77BLF001701
b
a
r
q
p
s
c
d
f
eg
h
i
j
l
k
mn
o
(a) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
(b) 19 N ⋅m (1.9 kgf ⋅m/14 lb ⋅ft)
(c) 30 N ⋅m (3.1 kgf ⋅m/22 lb ⋅ft)
(d) 83 N ⋅m (8.5 kgf ⋅m/61 lb ⋅ft)
(e) 39 N ⋅m (4.0 kgf ⋅m/29 lb ⋅ft)
(f) 30 N ⋅m (3.1 kgf ⋅m/22 lb ⋅ft)
(g) 76 N ⋅m (7.7 kgf ⋅m/56 lb ⋅ft)
(h) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
(i) 39 N ⋅m (4.0 kgf ⋅m/29 lb ⋅ft)
(j) 39 N ⋅m (4.0 kgf ⋅m/29 lb ⋅ft) (k) 30 N
⋅m (3.1 kgf ⋅m/22 lb ⋅ft)
(l) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
(m) 39 N ⋅m (4.0 kgf ⋅m/29 lb ⋅ft)
(n) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
(o) 39 N ⋅m (4.0 kgf ⋅m/29 lb ⋅ft)
(p) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
(q) 34 N ⋅m (3.5 kgf ⋅m/25 lb ⋅ft)
(r) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
(s) 23 N ⋅m (2.3 kgf ⋅m/17 lb ⋅ft)
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Page 4726 of 6020
Manual Transmission (MUX) 7B1-7
Legend
RTW77BLF002901
t
u
v
w
y
x
(t) 9 N⋅m (0.9 kgf ⋅m/78 lb ⋅in)
(u) 47 N ⋅m (4.8 kgf ⋅m/35 lb ⋅ft)
(v) 9 N ⋅m (0.9 kgf ⋅m/78 lb ⋅in)
(w) 36 N ⋅m (3.7 kgf ⋅m/27 lb ⋅ft) (x) 25 N
⋅m (2.5 kgf ⋅m/18 lb ⋅ft)
(y) 25 N ⋅m (2.5 kgf ⋅m/18 lb ⋅ft)
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Page 4727 of 6020
7B1-8 Manual Transmission (MUX)
Transmission Assembly
Removal
1. Disconnect battery ground cable.
2. Remove the gear control knob.
3. Remove the rear floor console. (Bucket seat) Refer to the section "Floor Console".
4. Remove the front floor console. Refer to the section "Floor Console".
Legend 1. Gear control knob
2. Rear floor console
3. Front floor console
5. Remove the grommet assembly.
Legend 1. Grommet assembly
2. Floor panel
3. Front
6. Remove the gear control lever (1).
7. Raise and support vehicle with suitable stands.
8. Remove the rear propeller shaft.
RTW77BSH000101
1
32
RTW77BMH000101
1
2
3
RTW77BSH007101
1
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Page 4728 of 6020
Manual Transmission (MUX) 7B1-9
• Apply alignment marks on the flange at thedifferential side.
9. Remove the front propeller shaft. (4x4 model) • Apply alignment marks on the flange at bothfront and rear side. 10. Disconnect the harness connectors and clips on
the transmission.
Legend 1. Neutral switch connector
2. Clutch damper valve connector
Legend 3. Clip
4. Reverse switch connector
5. 1st switch connector
RTW77BSH000201
RTW77BSH000201
RTW77BSH006601
1
2
RTW77BSH006701
3
3 54
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ISUZU KB P190 2007