Dodge Sprinter 2006 Manual page 1777

VA
DI AGN OSI S AN D T EST I N G
AUTOMA TIC TRANSMISSION
CAUTION: Before attempting any repair on a NAG1
automatic transmission, check for Diagnostic Trou-
ble Codes with the appropriate scan tool.
Tr a n sm ission m a lfu n ct ion s m a y be ca u sed by t h ese
gen er a l con dit ion s:
• P oor en gin e per for m a n ce.
• Im pr oper a dju st m en t s.
• H ydr a u lic m a lfu n ct ion s.
• Mech a n ica l m a lfu n ct ion s.
• E lect r on ic m a lfu n ct ion s.
• Tr a n sfer ca se per for m a n ce (if equ ipped).
Dia gn osis of t h ese pr oblem s sh ou ld a lwa ys begin
by ch eckin g t h e ea sily a ccessible va r ia bles: flu id level
a n d con dit ion , gea r sh ift ca ble a dju st m en t . Th en per-
for m a r oa d t est t o det er m in e if t h e pr oblem h a s been
cor r ect ed or if m or e dia gn osis is n ecessa r y.
PRELIMINARY
Two ba sic pr ocedu r es a r e r equ ir ed. On e pr ocedu r e
for veh icles t h a t a r e dr iva ble a n d a n a lt er n a t e pr oce-
du r e for disa bled veh icles (will n ot ba ck u p or m ove
for wa r d).
VEHICLE IS DRIVABLE
(1) Ch eck for t r a n sm ission fa u lt codes u sin g t h e
a ppr opr ia t e sca n t ool.
(2) Ch eck flu id level a n d con dit ion .
(3) Adju st gea r sh ift ca ble if com pla in t wa s ba sed
on dela yed, er r a t ic, or h a r sh sh ift s.
(4) Roa d t est a n d n ot e h ow t r a n sm ission u psh ift s,
down sh ift s, a n d en ga ges.
VEHICLE IS DISABLED
(1) Ch eck flu id level a n d con dit ion .
GEAR RATIO
1 3.59
2 2.19
3 1.41
4 1.00
5 0.83
N N/A
R 3.16
R - Limp In 1.93
AUTOMA TIC TRANSMISSION NAG1 - SERVICE INFORMA TION 21 - 39
CLU T CH APPLI CAT I ON
B1 B2 B3
X* X
X
X
X
X
X* X
X
* = The shift components required during coast.
(2) Ch eck for br oken or discon n ect ed gea r sh ift
ca ble.
(3) Ch eck for cr a cked, lea kin g cooler lin es, or loose
or m issin g pr essu r e-por t plu gs.
(4) Ra ise a n d su ppor t veh icle on sa fet y st a n ds,
st a r t en gin e, sh ift t r a n sm ission in t o gea r, a n d n ot e
followin g:
(a ) If pr opeller sh a ft t u r n s bu t wh eels do n ot ,
pr oblem is wit h differ en t ia l or a xle sh a ft s.
(b) If pr opeller sh a ft does n ot t u r n a n d t r a n sm is-
sion is n oisy, st op en gin e. Rem ove oil pa n , a n d
ch eck for debr is. If pa n is clea r, r em ove t r a n sm is-
sion a n d ch eck for da m a ged dr ivepla t e, con ver t er,
oil pu m p, or in pu t sh a ft .
(c) If pr opeller sh a ft does n ot t u r n a n d t r a n sm is-
sion is n ot n oisy, per for m h ydr a u lic-pr essu r e t est t o
det er m in e if pr oblem is h ydr a u lic or m ech a n ica l.
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 a ll 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 , over r u n n in g clu t ch , or lin e pr essu r e pr oblem s.
A slippin g clu t ch 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 i-
ou s gea r r a n ges. Th e Clu t ch Applica t ion ch a r t
CLUTCH AP P LICATION pr ovides a ba sis for a n a lyz-
in g r oa d t est r esu lt s.
K1 K2
X
X X
X X
X
X
ch ecked a n d
K3 F1 F2
X* X
X*
X
X X*
X
X X
X
X
X