1994 HONDA INTEGRA clutch

VALVEBODIES
TOROUE CONVERTERASSEMBLY
VEHICLE SPEED SENSOR IVSSI1ST-HOLD CLUTCH
SUB SHAFT3RD CLUTCH
SPEED SENSOR
MAINSHAFT
SPEED SENSOR1ST CLUTCH
COUNTERSHAFT
14-5

Description
Clutches
The four speed automatic transmission uses hydraulically actuated clutches to engage or disengage the transmission gears.
When clutch pressure is introduced into the clutch drum, the clutch piston is applied. This presses the iriction discs and
steel plates together, locking them so they don't slip. Power is then transmitted through the engaged clutch pack tojts hub-mounted gear.
Likewise, when clutch pressure is bled from the clutch pack. the piston releases the friction discs and steel plates, and
they are {ree to slide past each other while disengaged. This allows the gear to spin independently on its shaft, transmit-
ting no power.
1st ClutchThe l st clutch engages/disengages 1st gear, and is located at the end of the mainshaft, just behind the right side cover.
The 1st clutch is supplied clutch pressure by its oil feed pipe within the mainshaft.
1st-hold clutchThe 1st-hold clutch engages/disengages 1st-hold or I Fosition, and is located at the center ol the sub-shaft. The 1st-
hold clutch is supplied clulch pressure by its oil feed pipe within the sub-shait.
2nd ClutchThe 2nd clutch engages/disengages 2nd gear, and is located at the center of the mainshaft. The 2nd clutch is joined
back-to-back to the 4th clutch. The 2nd clutch is supplied clutch pressure through the mainshaft by a circuit connected
to the regulator valve body.
3rd Clutch
The 3rd clutch engages/disengages 3rd gea.. and is located at the end oJ the countershaft, opposite the right side cover.
The 3rd clutch is supplied clutch pressure by its oil feed pipe within the countershaft,
4th clurch
The 4th clutch engages/disengages 4th gear. as well as reverse gear, and is located at the center of the mainshaft.
The 4th clutch is joined back-to-back to the 2nd clutch. The 4th clutch is supplied clutch pressure by its oil feed pipe
within the mainshalt.
One-way Clutch
The one-way clutch is posjtioned between the parking gear and 1st gear. with the parking gear splined to the counter-
shaft. The 1st gear provides the outer race, and the parking gear provides the inner race surface. The one-way clutch
locks up when power is transmitted from the mainshaft 1st gear to the countershaft lst ggel _The 1st clutch and gears remain engaged in the 1st. 2nd. 3rd, and 4th gear ranges in the @, E or E position.
However, the one-way clutch disengages when the 2nd. 3rd, or 4th clutches/gears are applied in the E, lD.l o, Eoosttton.
This is because the increased rotational speed of the gears on the countershaft over-ride the locking "speed range" of
the one-way clutch. Thereafter, the one-way clutch free-wheels with the lst clutch still engaged.
COUNTERSHAFT 1ST GEAR
FREE
:>
LOCKS
aF
NOTE:View trom right side cover side.
14-6

MAINSHAFT4TH GEAR
MAINSHAFT 3RD GEARSUB.SHAFT 4TH GEAR
lST,HOLD CLUTCHMAINSHAFT2ND GEARTOROUECONVERTER
SUB-SHAFT 1ST GEAR
SUB.SHAFT2ND CLUTCHSTARTERNING GEAR
LOCK-UPCLUTCH
4TH CLUTCHMAINSHAFT 1STGEAR
DRIVE PLATE
1ST CLUTCH
MAINSHAFT
ONE-WAY CLUTCH
PARKING GEAR
,I ST GEAR
COUNTERSHAFT REVERSE GEAR
REVERSE SELECTOR
REVERSE SELECTOR HU8
COUNTERSHAFT 4TH GEAR
COUNTERSHAFT 2ND GEAR
COUNTERSHAFT 3RD GEAR
DIFFERENTIAL
FINAL DRIVEN GEAR
3RD CLUTCH
14-7

Description
--.-.-___-t.-t*TOROUE
coN-
VERTER
t5t-
HOLD
CLUTCH
1ST GEAR
1ST
CLUTCH
2ND GEAR
2ND
CLUTCH
3RD GEAR
3RD
CLUTCH
4THREVERSE
GEAR
PARKING
GEAR
GEARCLUTCH
EoXXXXXXXo
troXxXxXooX
NoXXXXXXXX
E
1SToXoxXXXXX
2NDoX'ooxXXXX
3RDoX.oXoXXXX
4THoX-oXXooXX
E
1SToXoXXXXXX
2NDox-ooXXXXx
3RDoX-oXoXxXX
troX.ooXXXXX
troooXXXXXX
Power Flow
Q: Operates, X: Doesn't operate, ': Although the 1st clutch engages, driving powe. is not transmitted as the one-way
clutch sliDs.
14-8

@ Position
Hydraulic pressure is not applied to the clutches, Power is not transmitted to the countershaJt.
@ Position
Hydraulic pressure is not spplied to the clutches. Power is not transmitted to the countetshaft.
The countersha{t is locked by the parking pawl interlocking the parking gear.
TOROUE CONVERTER
PARKING GEAR
REVERSE SELECTOR
REVERSE GEAR
REVERSE SELECTORHUB
SERVO VALVE/SHIFT FORK SHAFT
14-9

Description
Power Flow lcont'dl
Lll Position Acceloration
In f position, hydraulic pressure is applied to the lst clutch and lst-hold clutch.
The power flow when accelerating is as tollows:
1. Hydraulic pressure is applied to the 1st clutch on the mainshalt and power is transmitted via the lst clutch to the
mainshaft 1st gear.
2. Hydraulic pressure is also applied to the 1st-hold clutch on the sub-shatt. Power transmitted to the mainshaft 1sl
gear is conveyed via the countershaft 1st gear to the one-way clutch. and via the sub-shaft 1 st gear to the l st-hold
clutch. The one-way clutch is used to drive the countershaft. and the 1st-hold clutch drives the countershaft via
the 4th gears.
3. Power is transmitted to the finai drive gear and drives the final d.iven gear,
SUB-SHAFT 4TH GEAR
SUB-SHAFTlST-HOLD CLUTCH
MAINSHAFT 1ST GEAR
1ST CLUTCH
COUNTERSHAFT
ONE-WAY CLUTCH
PARKING GEAR
,I ST GEAR
SUB.SHAFT 'IST GEAR
FINAL DRIVEN GEAR
14-10

L!_j Position Deceleration
The power tlow when decelerating is as follows;
1. Rolling resistance lrom the road surface goes through the tront wheels to the final drive gear, then to the sub-shaft
1st gear via the 4th gear, and lst-hold clutch which is applied during deceleration.
2. The one-way clutch becomes free at this time because torque reverses.
3. The counterforce conveyed to the countershaft 4th gear turns the sub-shaft 4th gear via the mainshaft 4th gear.
At this time, since hydraulic pressure is also applied to the 1st clutch, counterfo.ce is also transmitted to the main-
shaft. As a result, engine braking can be obtained with lst gea.-
CLUTCH
SUB-SHAFT4TH GEARSUB-SHAFT 1ST GEARTOROUE CONVENTER
FINAL DRIVE
SUB'STIAFT
lST CLUTCH
MAINSHAFT
COUNTERSHAFT
REVEFSE SELECTOR HUB
REVERSE SELECTOR
(cont'dl
4TI1 GEAB
14-11

Description
Power Flow (cont'd)
Ll Position
@ Position is provided to drive only 2nd speed.
1. Hydraulic pressure is applied to the 2nd clutch on the mainshatt and power is transmitted via the 2nd clutch to the
mainshaft 2nd gear.
2. Power transmitted to the mainshalt 2nd gear is conveyed via the countershaft 2nd gear, and drives the countersha{t.
3. Power is transmitted to the final drive gear and drives the final driven gear.
NOTE:
Hydraulic pressure is also applied to the lst clutch, but since the rotation speed of the 2nd gear exceeds that of
1st gear, power from 1st gear is cut off at the one-way clutch.
TOROUE CONVERTER2ND CLUTCH
MAINSHAFT
COUNTERSHAFT
FINAL DBIVE
2ND GEAR
FINAL DRIVEN GEAR
14-12