Page 4737 of 6020

7B1-18 Manual Transmission (MUX)
Legend50. Output shaft assembly
51. Pilot bearing
52. Pilot bearing spacer
53. 3rd-4th hub snap ring
54. 3rd-4th block ring
55. Plate spring
56. 3rd-4th synchronizer assembly
57. 3rd input gear needle bearing
58. 3rd input gear assembly
59. 5th hub snap ring
60. 5th synchronizer assembly 61. 5th block ring
62. 5th input gear needle bearing (2 piece type)
63. 5th input gear assembly
64. Input shaft assembly
65. Rubber seal
66. Counter end snap ring
67. Output counter gear
68. 3rd counter gear
69. 5th counter gear
70. Counter middle roller bearing outer race
71. Counter shaft assembly
Removal
1. Clean the exterior of the unit with solvent.
2. Remove the drain plug with gasket and drain the lubricant.
3. Remove the front cover. 4. In order to protect the front oil seal lip, wrap a tape
around the spline portion of the input shaft.
5. Remove the quadrant box and two dowels.
6. Remove the control unit block by performing the following steps.
a. Push the control unit block ahead.
RTW77BLF004701
50 51
52
53 54 55 56
54
57 58
64
63
62
61
60
59
6566
67 68
69
70 71
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ISUZU KB P190 2007
Page 4738 of 6020

Manual Transmission (MUX) 7B1-19
b. Remove the taper bolt, and discard the usedtaper bolt.
c. Remove the control unit block.
7. Remove the reverse switch (Connector color Brown), 1st switch (Connector color Gray) and
neutral switch (Connector color Brown) with
gasket.
Remove the three detent assemblies, and discard
the used 5th & reverse detent assemblies.
8. Remove the two harness brackets.
9. Remove the speedometer driven gear and plate. (4x2 model)
10. Remove the end cover assembly. 11. Remove the gear set clip. (4x2 model)
12. Remove the speedometer drive gear. (4x2 model)
13. Stand the transmission assembly.
14. Remove the output shaft snap ring (1).
15. Remove the output rear bearing inner race (2).
16. Remove the rear case assembly (1). 17. Remove the magnet (2).
18. Remove the intermediate plate assembly with gear (1) from the front case.
19. Remove the tape from the spline portion of the input shaft.
20. Remove the front gutter (1) and rear gutter (3), and discard the used gutters.
RTW77BSH006001
RTW77BSH003901
2
1
RTW77BSH008101
1
2
RTW77BSH007501
1
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ISUZU KB P190 2007
Page 4739 of 6020
7B1-20 Manual Transmission (MUX)
21. Remove the counter 2nd gutter (4) and counter 5thgutter (2).
22. Remove the shift rod bracket (1).
23. Remove the shift & select rod assembly (1). 24. Remove the control rod assembly (1).
25. Use a spring pin remover to remove the 1st-2nd shift arm spring pin.
26. Remove the shift rod (2) with the 1st-2nd shft block (3).
27. Remove the 1st-2nd shift arm (1).
28. Use a spring pin remover to remove the reverse shift arm spring pin.
RTW77BSH007601
1
4
3
2
RTW77BSH007701
1
RTW77BSH007801
1
RTW77BSH007901
1
RTW77BSH008001
3
2
1
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ISUZU KB P190 2007
Page 4740 of 6020

Manual Transmission (MUX) 7B1-21
29. Remove the reverse shift rod snap ring (1).
30. The shift block lever is put into the dent of the 3rd-4th-5th shift rod.
Legend 1. 3rd-4th-5th shift rod
2. Dent of 3rd-4th-5th shift rod
3. 5th-reverse shift block
4. Reverse shift rod
5. Shift block lever
6. 123.5 mm (4.86 in)
31. Remove the reverse shift rod.
32. Remove the reverse shift arm.
33. Use a spring pin remover to remove the 5th shift arm spring pin. 34. Remove the 3rd-4th-5th shift rod snap ring (1).
35. Remove the 3rd-4th-5th shift rod.
36. Remove the 5th shift arm.
37. Remove the 5th-reverse shift block assembly.
38. Remove the 3rd-4th shift arm assembly.
39. Remove the output shaft assembly.
40. Remove the rubber seal, and discard the used rubber seal.
41. Remove the counter end snap ring (1).
42. Remove the output counter gear.
43. Remove the pilot bearing.
44. Remove the pilot bearing spacer.
45. Remove the 3rd-4th block ring of the output shaft side.
46. Remove the plate spring.
RTW77BSH004701
1
RTW77BSH004801
1
6
2
5
4
3
RTW77BSH004901
1
RTW77BSH003701
1
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ISUZU KB P190 2007
Page 4741 of 6020

7B1-22 Manual Transmission (MUX)
47. Remove the 3rd-4th hub snap ring (1).
48. Remove the 3rd-4th synchronizer assembly, 3rd-4th block ring of 3rd input gear side, and 3rd input
gear assembly.
49. Remove the 3rd input gear needle bearing.
50. Remove the 3rd counter gear.
51. Remove the counter shaft assembly and 5th counter gear from the intermediate plate.
52. Remove the counter middle roller bearing outer race.
53. Remove the 5th hub snap ring (1).
54. Remove the 5th synchronizer assembly, 5th block ring and 5th input gear assembly.
55. Remove the 5th input gear needle bearing. (2 piece type)
56. Use a pair of snap ring pliers to hold the input middle bearing snap ring open .
Push the input shaft assembly toward the front of
the transmission to remove it.
The input middle bearing snap ring will come free.Inspection and Repair
Make necessary correction or parts replacement if
wear, damage or any other abnormal conditions are
found through inspection.
Shift Arm Thickness
Use a micrometer to measure the shift arm thickness.
If the measured value exceeds the specified limit, the
shift arm must be replaced.
Block Ring and Dog Teeth Clearance
Use a thickness gauge to measure the clearance
between the block ring and the dog teeth.
If the measured value exceeds the specified limit, the
block ring must be replaced.
RTW77BSH005001
1
RTW77BSH005101
1
Standard Limit
1st - 2nd 3rd - 4th 9.60 - 9.85 mm
(0.378 - 0.388 in) 8.85 mm
(0.348 in)
5th 9.60 - 9.85 mm
(0.378 - 0.388 in) 9.35 mm
(0.368 in)
Reverse 7.85 - 8.10 mm
(0.309 - 0.319 in) 7.60 mm
(0.299 in)
Standard Limit
3rd - 4th 5th 1.50 mm
(0.059 in) 0.80 mm
(0.031 in)
RTW77BSH006401
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ISUZU KB P190 2007
Page 4742 of 6020

Manual Transmission (MUX) 7B1-23
Block Ring and Insert Clearance
Use a vernier caliper or thickness gauge to measure
the clearance between the block ring and insert.
If the measured value exceeds the specified limit, the
block ring and insert must be replaced.
Clutch Hub and Insert Clearance
Use a thickness gauge to measure the clearance
between the clutch hub and insert.
If the measured value exceeds the specified limit, the
clutch hub and insert must be replaced. Gear Inside Diameter
Use an inside dial indicator to measure the gear inside
diameter.
If the measured value is less than the specified limit,
the gear must be replaced.
Standard
Limit
3rd - 4th 5th 3.59 - 3.91 mm
(0.141 - 0.154 in) 4.10 mm
(0.161 in)
LNW25CSH028401
RTW77BSH006501
Standard Limit
3rd - 4th 5th 0.09 - 0.31 mm
(0.004 - 0.012 in) 0.40 mm
(0.016 in)
Standard Limit
3rd 45.000 - 45.016 mm
(1.7717 - 1.7723 in) 45.056 mm
(1.7739 in)
5th 48.000 - 48.016 mm
(1.8898 - 1.8904 in) 48.056 mm
(1.8920 in)
LNW25CSH028701
LNW25CSH028901
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ISUZU KB P190 2007
Page 4743 of 6020

7B1-24 Manual Transmission (MUX)
Clutch Hub Spline Play• Set a dial indicator to the clutch hub to be measured.
• Move the clutch hub as far as possible to both the right and the left.
Note the dial indicator reading.
If the measured value exceeds the specified limit, the
clutch hub must be replaced.
Counter Gear Spline Play
Refer to Counter Shaft Assembly in this section.
Installation
1. Use a pair of snap ring pliers to hold the new input middle bearing snap ring open .
Install the input shaft assembly to the intermediate
plate.
• Never reinstall the used snap ring.
2. Install the input middle bearing snap ring.
3. Install the 5th input gear needle bearing. (2 piece type)
4. Install the 5th input gear assembly. • Apply engine oil to the gear internal surface.
5. Assemble the 5th synchronizer assembly by performing the following steps.
• Turn the clutch hub face (2) toward the sleeve groove (1) (rear side) on the outer
circumference. • Check that the inserts (3) fit snugly into the
clutch hub (6) ring insert grooves.
• Check that the inserts springs (4) are fitted to the inserts as shown in the figure.
• Check that the clutch hub (6) and the sleeve (5) slide smoothly.
• The insert springs (4) must be set in such a way that the opening of spring faces different
direction.
6. Install the 5th block ring and 5th synchronizer assembly.
7. Install the new 5th hub snap ring (1).
• Never reinstall the used snap ring.
• Choose the thickest snap ring among ones whitch can be assembled.
Snap Ring Availability
Standard
Limit
3rd - 4th 0.010 - 0.102 mm
(0.0004 - 0.0040 in) 0.15 mm
(0.0059 in)
5th 0.009 - 0.104 mm
(0.0004 - 0.0041 in) 0.15 mm
(0.0059 in)
LNW25CSH029101
Thickness Identification color
1.95 mm(0.077 in) No color
2.10 mm(0.083 in) Yellow
1
2
LNW25CSH025601
3 45
6
LNW25CSH025701
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ISUZU KB P190 2007
Page 4744 of 6020

Manual Transmission (MUX) 7B1-25
8. Install the counter middle roller bearing outer race,counter shaft assembly and 5th counter gear to the
intermediate plate.
• Apply engine oil to the gear internal surface.
9. Install the 3rd counter gear. • Apply engine oil to the gear internal surface.
10. Iinstall the 3rd input gear needle bearing.
11. Assemble the 3rd-4th synchronizer assembly by performing the following steps.
• Turn the clutch hub face (2) toward the sleeve groove (1) (rear side) on the outer
circumference.
• Check that the inserts (3) fit snugly into the clutch hub (6) ring insert grooves.
• Check that the inserts springs (4) are fitted to the inserts as shown in the figure.
• Check that the clutch hub (6) and the sleeve (5) slide smoothly.
• The insert springs (4) must be set in such a way that the opening of spring faces different
direction. 12. Install the 3rd input gear assembly, 3rd-4th block
ring of 3rd input gear side, and 3rd-4th
synchronizer assembly.
• Apply engine oil to the gear internal surface.
13. Install the new 3rd-4th hub snap ring (1).
• Never reinstall the used snap ring.
• Choose the thickest snap ring among ones whitch can be assembled.
Snap Ring Availability
RTW77BSH005101
1
Thickness Identification color
1.9 mm(0.075 in) No color
2.1 mm(0.083 in) Yellow
2.3 mm(0.091 in) Pink
1
2
LNW25CSH025601
3 45
6
LNW25CSH025701
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ISUZU KB P190 2007