Driveline Vibration Diagnosis And Repair (Dars) Charts - Jeep 1979 CJ-5 Technical & Service Manual

2E-4 PROPELLER SHAFT
Driveline Vibration Diagnosis arid Repair (DARS) Charts
N o t e : Refer t o Chapter
A
— G e n e r a l I n f o r m a t i o n f o r details on h o w t o use this
DARS
chart.
P R O B L E M : DRIVE LINE VIBRATION
STEP
SEQUENCE
RESULT
W H E E L / T I R E C O N D I T I O N
1. CHECK FOR BENT, C R A C K E D WHEELS
A N D CUPPED OR D A M A G E D T I R E S .
2. CHECK FOR M I S M A T C H E D T I R E SIZES
OR T R E A D PATTERNS.
3. CHECK A N D CORRECT T I R E I N F L A T I O N
PRESSURES AS N E E D E D .
4. ' R O A D TEST IF REPAIR OR R E P L A C E M E N T
WAS N E E D E D .
. C O R R E C T I O N NEEDED -
R O A D TEST
g
C O R R E C T I O N
NOT NEEDED
C O R R E C T I O N
• N E E D E D —
ROAD TEST
OK
©
R O A D TEST
D R I V E 5 - 1 0 MPH ABOVE V I B R A T I O N
R A N G E - T H E N - S H I F T TO N E U T R A L ,
LET ENGINE I D L E A N D C O A S T - T H R O U G H
V I B R A T I O N RANGE.
ROAD
TEST '
• V I B R A T I O N GONE
V I B R A T E S D U R I N G
' C O A S T - T H R O U G H
V I B R A T I O N STOPS
D U R I N G COAST-
T H R O U G H
( I N N E U T R A L )
.OK)—(stop
(o-s^—Q
W H E E L / T I R E BALANCE
A D D BALANCE
W E I G H T S H E R E
H E A V Y
SPOT
OF
SPINDLE
T I R E OR WHEEL T R A M P , C O R R E C T I V E W E I G H T
OR WHEEL HOP L O C A T I O N
STATIC U N B A L A N C E
CORRECT AS
NECESSARY
A N D R O A D TEST
( M A X . WHEEL W E I G H T
ALLOWANCE PER WHEEL
IS 1 0 - OUNCES)
A D D BALANCE
WEIGHTS HERE
f
OF
SPINDLE
H E A V Y SPOT
WHEEL S H I M M Y
A N D V I B R A T I O N
A
C O R R E C T I V E
W E I G H T
LOCATION
D Y N A M I C UNBALANCE
IF CORRECTION
p ™ WAS NEEDED-
REPEAT ROAD TEST
ROAD TEST OR
5 NO CORRECTION
NEEDED.
8 0 7 8 7 A