1996 HONDA CIVIC one way clutch

One-way Clulch
The one-way clutch is positioned between the countershaft 1st gear and the park gea., with the park gear splined to the counter-
shatt, The 1st gear provides the outer race surface, and the park gear provides the inner race surface. The one-way clutch
locks up when power is transmitted from the mainshaft 1st gear to thetountershaft 1st gear. The lst clutch and gears
remain engaged in the 1st, 2nd. 3rd, and 4th gear ranges in the p!1, p! or L?l position.
However, the one-way clutch disengages when the 2nd, 3rd, or 4th clutches/gears are applied in the E, E or @ position.
This is because the increased rotational speed of the gears on the countershaft overrides the locking "speed range" of the
one-way clutch. Thereafter, the one-way clutch free-wheels with the 1st clutch still engaged.
zNO CLUTCH ,lTH CLUTCH
1ST CLUTCH
MAINSHAFT
COUNTERSHAFT
ONE.WAY CLUTCH
INSIDE OF ONE.WAYCLUTCHSplaned with countershaft
disengage outsideand inside oI the
3RO CLUTCH
OUTSIDE OF ONE.WAYCLUTCH
PANK GEAR
The sprags engage/
OVER-RIDINGLOCKING SPEED CONDITIONLOCKING CONDITION
14-5

Description
Power Flow
O: Operates, x: Doesn't operate.*1: Although the 1st clutch engages, driving power is not transmitted as the one-way clutch slips.*2: The one-way clutch engages when accelerating, and slips when decelerating.
\ARTPOSMON\
TOROUE1ST GEAR
CLUTCH
2ND GEAR
2ND
CLUTCH
3RD GEAR
3RD
CLUTCH
4THREVERSE
GEAR
PARK
GEARCONVERTERCLUTCH
Eoo
Eooo
Eo
D]
1SToo*,
2NDoo*,o
3RDoo*1o
4THoo*1oo
tr
oO*r
2NDoo+ro
3RDoo*1o
Eoo*1o
14-6

Description
Power Flow (cont'dl
lst Gesr (E or @ position)
In lE or E position, the optimum gear is automatically selected from 1st,2nd,3rd and 4th gears, according to conditionssuch as the balance between throttle opening (engine load) and vehicle speed.
1. Hydraulic pressure is applied to the 1st clutch, which rotates together with the mainshaft, causing the mainshaft 1stgear to rotate.
Power is transmitted to the countershaft 1st gear, which drives the countershaft via the one-way clutch.
Power is transmitted to the final drive gear, which drives the final driven gear.
TOROUE CONVERTER
MAINSHAFT 1ST GEAR
lST CLUTCH
MAINSHAFT
AY CLUTCH
FINAL DRIVE GEAR
PARK GEAR
L
COUNTERSHAFT1ST GEAR
14-8

2nd Gear {8, E or E position)
E Position is provided to drive only 2nd gear.
1. Hydraulic pressure is applied to the 2nd clutch on the mainshaft, and power is transmifted via the 2nd clutch to the
mainshaft 2nd gear.
2, Powet transmitted to the mainshaft 2nd gear is conveyed via tho countorshaft 2nd gear, which drivos the counter-
shaft.
3. Power is transmined to the final drivB gear, which drives the final driven ge8r.
NOTE: Hydraulic pressure is also applied to the 1st clutch, but since the rotation speed of ths 2nd gear excaads that
of lst gear, power from 'lst gear is cut off at the one-way clutch.
TOROUE CONVERTER
2ND CLUTCH
MAII'ISHAFT
COUNTEBSHAFT 2I{D GEAR
(cont'd)
14-9

Description
Power Flow (cont'dl
3rd Gear (bl or bd positionl
1. Hydraulic pressure is applied to the 3rd clutch. Power from the mainshaft 3rd gear is transmitted to the countershaft3rd gear.
2. Power is transmitted to the final drive gear, which drives the tinal driven gear.
NOTE: Hydraulic pressure is also applied to the 1st clutch, but since the rotation speed of 3rd gear exceeds that of 1stgear, power from lst gear is cut off at the one-way clutch.
TOROUE CONVERTER
MAINSHAFT 3RD GEAR
MAINSHAFT
COUNTERSHAFT
3RD GEAB
3RD CLUTCH
14-10
DRIVEN GEAR

4th cear lE position)
1. Hydraulic pressure is applied to the 4th clutch, which rotates together with the mainshaft, causing the mainshaft 4th
gear to rotate.
2. Power is transmitted to the countershaft 4th gear' which drives the countershaft'
3. Power is transmitted to the final drive gear, which drives the final driven gear'
NOTE: Hvdraulic pressure is also applied to the lst clutch, but since the rotation speed of 4th gear exceeds that of 1st
gear, power from 1st gear is cut off at the one-way clutch
TOROUE
MAINSHAFT 4TH GEAR
COUNTERSHAFT
FINAL ORIVEN GEAR
14-11

Description
Hydraulic Flow (cont'd)
L?j Position
The line pressure (1) flows to the manual valve and the modulator valve. The line pressure (1) changes the trne pressure(4) and (25) at the manual valve. and changes to the modulator pressure at the modulator valve. But the moourator pres-sure (6) does not flow to each shift valve because shift control solenoid valves A and B are turned oN by the pcM. Theline pressure (4) passes through the cPB valve and the cPc valve. and changes to the line pressure (s), th;n flows to the1-2 shift valve. The line pressure {S) from the l-2 shift valve changes to the 2nd clutch pressure (20) at the 2-3 shift valve.The 2nd clutch pressure (20) is applied to the 2nd clutch. and the 2nd clutch is engaged. The line pressure (4) passesthrough the 1-2 shift valve and the orifice, and changes the lst clutch pressure, The 1st clutch pressure (10) atso flows tothe 1st clutch. However, no power is transmitted because of the one_way clutch.
NOTE: When used, "Ieft" or "right" indicates direction on the hvdraulic circuit.
14-26

Description
Hydraulic Flow (cont'd)
2nd G.!r
As tha speed of the vehicle reaches the prescribed value, shift control solenoid valve A is turned oN by means of thePCM The modulator pressure {64} in the left end of the 1-2 shift valve is r€leased by turning shift controt sotenoidvalve A oN The 1-2 shift valve is moved to the left side and uncovers the port to allow line pressure {5) to the z-3shift valve. The line pressure (5) changes to the 2nd ctutch pfessure l2O) at the 2-3 shift valve. The 2nd clutch pressure(20) is applied to the 2nd clutch, and the 2nd clutch is engaged.
Fluid flows by way of:- Line Pressure (4) + cPB varve - Line pressure (s) * 'r-2 shift varve - Line pressure (5) * 2-3 shift varve- 2nd Clutch Pressure (20) + 2nd Clutch
The hydraulic pressure also flows to the 1st clutch. However, no power is transmittod because of the one-way ctutch.
NOTE: When used, "|eft" or ,,right,, indicates direction on the hydraulic circuit.
\-
14-28