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X J
DI AGN OSI S AN D T EST I N G (Cont inue d)
Sh ift t h e t r a n sm ission in t o RE VE RSE a n d t est
con t in u it y a t t h e swit ch ou t er t er m in a ls. Con t in u it y
sh ou ld exist on ly wh en t h e t r a n sm ission is in
RE VE RSE . Con t in u it y sh ou ld n ot exist bet ween t h e
ou t er t er m in a ls a n d t h e ca se.
Ch eck gea r sh ift lin ka ge a dju st m en t befor e r epla c-
in g a swit ch t h a t t est s fa u lt y.
GEARSHIFT CABLE
(1) Th e floor sh ift er lever a n d ga t e posit ion s
sh ou ld be in a lign m en t wit h a ll t r a n sm ission PARK,
NE UTRAL, a n d gea r det en t posit ion s.
(2) E n gin e st a r t s m u st be possible wit h floor sh ift
lever in PARK or NE UTRAL ga t e posit ion s on ly.
E n gin e st a r t s m u st n ot be possible in a n y ot h er gea r
posit ion .
(3) Wit h floor sh ift lever h a n dle pu sh -bu t t on n ot
depr essed a n d lever in :
(a ) PARK posit ion —Apply for wa r d for ce on cen -
t er of h a n dle a n d r em ove pr essu r e. E n gin e st a r t s
m u st be possible.
(b) PARK posit ion —Apply r ea r wa r d for ce on cen -
t er of h a n dle a n d r em ove pr essu r e. E n gin e st a r t s
m u st be possible.
(c) NE UTRAL posit ion —Nor m a l posit ion . E n gin e
st a r t s m u st be possible.
(d) NE UTRAL posit ion —E n gin e r u n n in g a n d
br a kes a pplied, a pply for wa r d for ce on cen t er of
sh ift h a n dle. Tr a n sm ission sh a ll n ot be a ble t o sh ift
fr om n eu t r a l t o r ever se.
THROTTLE VALVE CABLE
Tr a n sm ission t h r ot t le va lve ca ble a dju st m en t is
ext r em ely im por t a n t t o pr oper oper a t ion . Th is a dju st -
m en t posit ion s t h e t h r ot t le va lve, wh ich con t r ols sh ift
speed, qu a lit y, a n d pa r t -t h r ot t le down sh ift sen sit ivit y.
If ca ble set t in g is t oo loose, ea r ly sh ift s a n d slip-
pa ge bet ween sh ift s m a y occu r. If t h e set t in g is t oo
t igh t , sh ift s m a y be dela yed a n d pa r t t h r ot t le down -
sh ift s m a y be ver y sen sit ive. Refer t o t h e Adju st -
m en t s sect ion for t h e pr oper a dju st m en t pr ocedu r e.
ROAD TESTING
Befor e r oa d t est in g, be su r e t h e flu id level a n d con -
t r ol ca ble a dju st m en t s h a ve been
a dju st ed if n ecessa r y. Ver ify t h a t dia gn ost ic t r ou ble
codes h a ve been r esolved.
Obser ve en gin e per for m a n ce du r in g t h e r oa d t est .
A poor ly t u n ed en gin e will n ot a llow a ccu r a t e a n a ly-
sis of t r a n sm ission oper a t ion .
Oper a t e t h e t r a n sm ission in a ll gea r r a n ges. Ch eck
for sh ift va r ia t ion s a n d en gin e fla r e wh ich in dica t es
slippa ge. Not e if sh ift s a r e h a r sh , spon gy, dela yed,
ea r ly, or if pa r t t h r ot t le down sh ift s a r e sen sit ive.
Slippa ge in dica t ed by en gin e fla r e, u su a lly m ea n s
clu t ch , ba n d or over r u n n in g clu t ch pr oblem s. If t h e
TRANSMISSION AND TRANSFER CASE
con dit ion is a dva n ced, a n over h a u l will be n ecessa r y
t o r est or e n or m a l oper a t ion .
A slippin g clu t ch or ba n d ca n oft en be det er m in ed
by com pa r in g wh ich in t er n a l u n it s a r e a pplied in t h e
va r iou s gea r r a n ges. Th e Clu t ch a n d Ba n d Applica -
t ion ch a r t pr ovides a ba sis for a n a lyzin g r oa d t est
r esu lt s.
ANAL YZING ROAD TEST
Refer t o t h e Clu t ch a n d Ba n d Applica t ion ch a r t
a n d n ot e wh ich elem en t s a r e in u se in t h e va r iou s
gea r r a n ges.
Ver ify t h a t t h e r ea r clu t ch is a pplied in a ll for wa r d
r a n ges (D, 2, 1). Th e t r a n sm ission over r u n n in g clu t ch
is a pplied in fir st gea r (D, 2 a n d 1 r a n ges) on ly. Th e
r ea r ba n d is a pplied in 1 a n d R r a n ge on ly.
Ver ify t h a t t h e over dr ive clu t ch is a pplied on ly in
fou r t h gea r a n d t h e over dr ive dir ect clu t ch a n d over-
r u n n in g clu t ch a r e a pplied in a ll r a n ges except fou r t h
gea r. F or exa m ple: If slippa ge occu r s in fir st gea r in
D a n d 2 r a n ge bu t n ot in 1 r a n ge, t h e t r a n sm ission
over r u n n in g clu t ch is fa u lt y. Sim ila r ly, if slippa ge
occu r s in a n y t wo for wa r d gea r s, t h e r ea r clu t ch is
ch ecked a n d
slippin g.
Applyin g t h e sa m e m et h od of a n a lysis, ver ify t h a t
t h e fr on t a n d r ea r clu t ch es a r e a pplied sim u lt a -
n eou sly on ly in D r a n ge t h ir d gea r. If t h e t r a n sm is-
sion slips in t h ir d gea r, eit h er t h e fr on t clu t ch or t h e
r ea r clu t ch is slippin g.
If slippa ge occu r s du r in g t h e t h ir d gea r a n d t h e
dir ect clu t ch wer e t o fa il, t h e t r a n sm ission wou ld lose
bot h r ever se gea r a n d over r u n br a kin g in 2 posit ion
(m a n u a l secon d gea r ). If t h e t r a n sm ission slips in
a n y ot h er for wa r d gea r s, t h e t r a n sm ission r ea r clu t ch
is pr oba bly slippin g.
Fig. 5 Clutch And Band Application
21 - 79
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