1996 ACURA RL KA9 Service Repair Manual

Description
(cont'd)
Gear Selectio n
The shif t leve r ha s seve n positions : PARK , REVERSE , NEUTRAL , 1s t throug h 4t h gea r ranges , 1s t throug h
3rd gea r ranges , 2n d gea r an d 1s t gear .
Positio n Description
PARK
REVERS E
NEUTRAL
DRIVE
(1st throug h 4th )
DRIV E
(1st throug h 3rd )
SECON D
FIRST
Front wheel s locked ; par k paw l engage d wit h par k gea r o n countershaft . Al l clutche s released .
Reverse ; revers e clutc h engaged .
Al l clutche s released .
Genera l driving ; start s of f i n 1st , shift s automaticall y t o 2nd , 3rd , the n 4th , dependin g o n vehicl e
spee d an d throttl e position . Downshift s throug h 3rd , 2n d an d 1s t o n deceleratio n t o stop . Th e lock -
up mechanis m come s int o operatio n i n positio n i n 2nd , 3r d an d 4t h gear .
Us e fo r rapi d acceleratio n a t highwa y speed s an d genera l driving ; up-hil l an d down-hil l driving ; start s
of f i n 1st , shift s automaticall y t o 2nd , the n 3rd , dependin g o n vehicl e spee d an d throttl e position .
Downshift s throug h 2n d t o 1s t o n deceleratio n t o stop . Th e lock-u p mechanis m come s int o operatio n
i n 3r d speed .
Us e fo r engin e brakin g o r bette r tractio n startin g of f o n loos e o r slipper y surfaces ; stay s i n 2n d
gear , doe s no t shif t u p o r down .
Us e fo r engin e braking ; stay s i n 1s t gear , doe s no t shif t up .
Startin g i s possible only i n an d position s throug h th e us e o f a slide-type , neutral-safet y switch .
Automati c Transaxl e (A/T ) Gea r Positio n Indicato r
Th e A/ T gea r positio n indicato r i n th e instrumen t pane l show s whic h gea r ha s bee n selecte d withou t havin g t o loo k dow n
a t th e console .
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ATF DIPSTICK

RING GEAR/DRIVE PLATE

TORQUE

CONVERTER

4TH CLUTCH

1ST CLUTCH

2ND CLUTCH

MAINSHAFT

COUNTERSHAFT
DIFFERENTIAL

ASSEMBLY

EXTENSION

SHAFT

SECONDARY

DRIVEN GEAR

REVERSE

CLUTCH
1ST-HOLD

CLUTCH
3RD CLUTCHProCarManuals.com

Description
Clutches
The four-spee d automati c transmissio n use s hydraulically-actuate d clutche s t o engag e o r disengag e th e transmissio n gears .
Whe n th e hydrauli c pressur e i s introduce d int o th e clutc h drum , th e clutc h pisto n moves . Thi s presse s th e frictio n disc s
an d stee l plate s together , lockin g the m s o the y don' t slip . Powe r i s the n transmitte d throug h th e engage d clutc h pac k t o it s
hub-mounte d gear . Likewise , whe n th e hydrauli c pressur e is ble d fro m th e clutc h pack , th e pisto n release s th e frictio n disc s
an d stee l plates , an d the y ar e fre e t o slid e pas t eac h other . Thi s allow s th e gea r t o spi n independentl y o f it s shaft , transmit -
ting n o power .
1st Clutc h
Th e 1s t clutc h engages/disengage s 1s t gear , an d i s locate d a t th e middl e o f th e mainshaft . Th e 1s t clutc h is joine d back-to -
bac k t o th e 4t h clutch . Th e 1s t clutc h i s supplie d hydrauli c pressur e b y it s AT F fee d pip e withi n th e mainshaft .
1st-hol d Clutc h
The 1st-hol d clutc h engages/disengage s Ist-hold , positio n o r position , an d i s locate d a t th e middl e o f th e counter -
shaft . Th e Ist-hol d clutc h i s supplie d hydrauli c pressur e b y it s AT F fee d pip e withi n th e countershaft .
2n d Clutc h
Th e 2n d clutc h engages/disengage s 2n d gear , an d i s locate d o n th e rea r en d o f th e mainshaft . Th e 2n d clutc h i s supplie d
hydrauli c pressur e b y it s AT F fee d pip e withi n th e mainshaft .
3r d Clutc h
Th e 3r d clutc h engages/disengage s 3r d gear , an d i s locate d a t th e en d o f th e countershaft , opposit e th e rea r cover . Th e
3r d clutc h i s supplie d hydrauli c pressur e b y a circui t connecte d t o th e interna l hydrauli c circuit .
4th Clutc h
The 4t h clutc h engages/disengage s 4t h gear , an d i s locate d a t th e middl e o f th e mainshaft . Th e 4t h clutc h i s joine d back -
to-bac k t o th e 1s t clutch . Th e 4t h clutc h i s supplie d hydrauli c pressur e b y a circui t connecte d t o th e interna l hydrauli c cir -
cuit .
Revers e Clutc h
The revers e clutc h engages/disengage s revers e gear , an d i s locate d o n th e rea r en d o f th e countershaft . Th e revers e clutc h i s
supplie d hydrauli c pressur e b y it s AT F fee d pip e withi n th e countershaft .
One-wa y Clutc h
Thi s transmissio n ha s tw o one-wa y clutches : th e 1s t gea r one-wa y clutc h an d th e 2n d gea r one-wa y clutch . Th e 1s t gea r
one-wa y clutc h i s positione d betwee n th e countershaf t 1s t gea r an d th e one-wa y clutc h hub , wit h th e one-wa y clutc h hu b
spline d t o th e countershaf t 2n d gear . Th e countershaf t 1s t gea r provide s th e oute r rac e surface , an d th e one-wa y clutc h
hu b provide s th e inne r rac e surface . Th e 2n d gea r one-wa y clutc h i s positione d betwee n th e countershaf t 2n d gea r an d
th e par k gear , wit h th e par k gea r spline d t o th e countershaft . Th e countershaf t 2n d gea r provide s th e oute r rac e surface ,
an d th e par k gea r provide s th e inne r rac e surface . Th e one-wa y clutche s loc k u p whe n powe r i s transmitte d fro m th e
mainshaf t 1s t gea r t o th e countershaf t 1s t gear . Th e 2n d gea r one-wa y clutc h lock s u p whe n powe r i s transmitte d fro m th e
mainshaf t 2n d gea r t o th e countershaf t 2n d gear . Th e 1s t clutc h an d gear s remai n engage d i n th e 1st , 2nd , 3rd , an d 4t h
gea r position s i n th e o r position . However , th e 1s t gea r one-wa y clutc h disengage s whe n th e 2nd , 3rd , o r 4t h
clutches/gear s ar e applie d i n th e o r position . Thi s i s becaus e th e increase d rotationa l spee d o f th e gear s o n th e
countershaf t over-rid e th e lockin g "spee d range " o f th e one-wa y clutch . Thereafter , th e one-wa y clutc h freewheel s wit h
th e 1s t clutc h stil l engaged .
OUTSIDE O F ONE-WA Y
CLUTCH
The sprag s engage /
disengag e outsid e
and insid e o f th eone-wa y clutch . INSID
E O F ONE-WA Y
CLUTCH
Spline d wit h counter -
shaf t
LOCKIN G CONDITIO N
SPRAG
OVER-RIDIN G
LOCKING SPEE D CONDITIO N
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