Honda Odyssey 2004. Manual — part 157
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S0X4AA0E10410900000CAAT01
Power Flow
14-22
Automatic Transmission
System Description (cont’d)
POSITION
PART
4TH
P
R
N
D4
1ST
2ND
3RD
4TH
D3
1ST
2ND
3RD
2
1
:Operates
:Doesn’t operate
Gear Operation
Gears on the mainshaft:
• The 3rd gear is engaged/disengaged with the mainshaft by the 3rd clutch.
• The 4th gear is engaged/disengaged with the mainshaft by the 4th clutch.
• The reverse gear is engaged/disengaged with the mainshaft by the 4th clutch.
• The idler gear is splined with the mainshaft and rotates with the mainshaft.
Gears on the countershaft:
• The final drive gear is integral with the countershaft.
• The 1st gear, 3rd gear, 2nd gear, and park gear are splined with the countershaft, and rotate with the countershaft.
• The 4th gear and reverse gear rotate freely from the countershaft. The reverse selector engages the 4th gear or the
reverse gear with the reverse selector hub. The reverse selector hub is splined with the countershaft so that the 4th
gear or reverse gear engages with the countershaft.
• The idler gear rotates freely from the countershaft.
Gears on the secondary shaft:
• The 1st gear is engaged/disengaged with the secondary shaft by the 1st clutch.
• The 2nd gear is engaged/disengaged with the secondary shaft by the 2nd clutch.
• The idler gear is splined with the secondary shaft and rotates with the secondary shaft.
TORQUE
CONVERTER
1ST GEAR
1ST CLUTCH
2ND GEAR
2ND
CLUTCH
3RD GEAR
3RD
CLUTCH
REVERSE
GEAR
PARK
GEAR
GEAR
CLUTCH
03/07/29 09:29:20 61S0X050_140_0025
01
P Position
N Position
14-23
MAINSHAFT
IDLER GEAR
MAINSHAFT
PARK
GEAR
COUNTERSHAFT
SECONDARY
SHAFT
SECONDARY SHAFT
IDLER GEAR
TORQUE CONVERTER
REVERSE
SELECTOR
Hydraulic pressure is not applied to the clutches. Power is not transmitted to the countershaft. The countershaft is
locked by the park pawl interlocking the park gear.
Engine power transmitted from the torque converter drives the mainshaft idler gear, the countershaft idler gear, and
the secondary shaft idler gear, but hydraulic pressure is not applied to the clutches. Power is not transmitted to the
countershaft. The countershaft 4th gear is engaged to the reverse selector hub by the shift fork reverse selector when
the shift lever is shifted in the N position from the D4 position. The countershaft reverse gear is engaged when shifted
from the R position.
(cont’d)
03/07/29 09:29:21 61S0X050_140_0026
18
Power Flow (cont’d)
D4 or D3 Position in 1st gear and the 1 Position
14-24
Automatic Transmission
System Description (cont’d)
MAINSHAFT IDLER GEAR
MAINSHAFT
COUNTERSHAFT
SECONDARY
SHAFT
SECONDARY SHAFT
IDLER GEAR
TORQUE CONVERTER
COUNTERSHAFT
1ST GEAR
COUNTERSHAFT
IDLER GEAR
1ST CLUTCH
SECONDARY SHAFT
1ST GEAR
FINAL DRIVEN GEAR
FINAL DRIVE GEAR
In the D4 or D3 position, the optimum gear is automatically selected from the 1st, 2nd, 3rd, and 4th gears, according to
conditions such as the balance between the throttle opening (engine loading) and vehicle speed.
• Hydraulic pressure is applied to the 1st clutch, then the 1st clutch engages the secondary shaft 1st gear with the
secondary shaft.
• The mainshaft idler gear drives the secondary shaft via the countershaft idler gear and secondary shaft idler gear.
• The secondary shaft 1st gear drives the countershaft 1st gear and the countershaft.
• Power is transmitted to the final drive gear, which in turn drives the final driven gear.
03/07/29 09:29:21 61S0X050_140_0027
19
D4 or D3 Position in 2nd gear and the 2 Position
14-25
MAINSHAFT
IDLER GEAR
MAINSHAFT
COUNTERSHAFT
SECONDARY
SHAFT
SECONDARY SHAFT
IDLER GEAR
TORQUE CONVERTER
COUNTERSHAFT
2ND GEAR
2ND CLUTCH
SECONDARY SHAFT
2ND GEAR
FINAL DRIVEN GEAR
FINAL DRIVE GEAR
COUNTERSHAFT
IDLER GEAR
• Hydraulic pressure is applied to the 2nd clutch, then the 2nd clutch engages the secondary shaft 2nd gear with the
secondary shaft.
• The mainshaft idler gear drives the secondary shaft via the countershaft idler gear and secondary shaft idler gear.
• The secondary shaft 2nd gear drives the countershaft 2nd gear and the countershaft.
• Power is transmitted to the final drive gear, which in turn drives the final driven gear.
(cont’d)
03/07/29 09:29:21 61S0X050_140_0028
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