Jeep Cherokee 1999 Electronic Service Manual page 1363

21 - 40 TRANSMISSION AND TRANSFER CASE
DI AGN OSI S AN D T EST I N G (Cont inue d)
TRANSMISSION NOISE
Most m a n u a l t r a n sm ission s m a ke som e n oise du r-
in g n or m a l oper a t ion . Rot a t in g gea r s gen er a t e a m ild
wh in e t h a t is a u dible, bu t gen er a lly on ly a t ext r em e
speeds.
Sever e, h igh ly a u dible t r a n sm ission n oise is gen er-
a lly t h e in it ia l in dica t or of a lu br ica n t pr oblem .
In su fficien t , im pr oper, or con t a m in a t ed lu br ica n t will
pr om ot e r a pid wea r of gea r s, syn ch r os, sh ift r a ils,
for ks a n d bea r in gs. Th e over h ea t in g ca u sed by a
lu br ica n t pr oblem , ca n a lso lea d t o gea r br ea ka ge.
REM OVAL AN D I N STALLAT I ON
TRANSMISSION
REMOVAL
(1) Sh ift t r a n sm ission in t o fir st or t h ir d gea r.
(2) Ra ise a n d su ppor t veh icle on su it a ble sa fet y
st a n ds.
(3) Discon n ect n ecessa r y exh a u st syst em com po-
n en t s.
(4) Rem ove skid pla t e, if equ ipped.
(5) Rem ove sla ve cylin der fr om clu t ch h ou sin g.
(6) Ma r k r ea r pr opeller sh a ft a n d r ea r a xle yokes
for in st a lla t ion a lign m en t (F ig. 6).
Fig. 6 Marking Propeller Shaft And Axle Yokes
(7) Ma r k fr on t pr opeller sh a ft , a xle, a n d t r a n sfer
ca se yokes for in st a lla t ion a lign m en t , if equ ipped.
(8) Rem ove pr opeller sh a ft (s).
(9) Un clip wir e h a r n esses fr om t r a n sm ission a n d
t r a n sfer ca se, if equ ipped.
(10) Discon n ect t r a n sfer
equ ipped.
(11) Disen ga ge a n y wir e con n ect or s a t t a ch ed t o
t r a n sm ission or t r a n sfer ca se, if equ ipped, com po-
n en t s.
(12) Su ppor t t r a n sfer ca se, if equ ipped, wit h t r a n s-
m ission ja ck.
ca se ven t h ose, if
(13) Secu r e t r a n sfer ca se, if equ ipped, t o ja ck wit h
sa fet y ch a in s.
(14) Discon n ect t r a n sfer ca se sh ift lin ka ge a t
t r a n sfer ca se, if equ ipped.
(15) Rem ove n u t s a t t a ch in g t r a n sfer ca se t o t r a n s-
m ission , if equ ipped.
(16) Rem ove t r a n sfer ca se, if equ ipped.
(17) Rem ove cr a n ksh a ft posit ion sen sor (F ig. 7),
(F ig. 8).
Fig. 7 Crankshaft Position Sensor—2.5L Engine
Fig. 8 Crankshaft Position Sensor —4.0L Engine
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