Trouble Diagnosis Chart - Pontiac TRANS AM 1977 Service Manual

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ACCELERATION SHUDDER
AT 0-15 M.P.H.
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INCORRECT F R O M
JOINT ANGLE
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SHIM UNDER TRANSMISSION MOUNT
TO CORRECT JOINT ANGLE
PROPELLER SHAFT DIAGNOSIS
VIBRATION, ROUGHNESS, RUMBLE AND/OR BOOM
RIDE CAR TO DETERMINE
PROBLEM 81 SPEED
(ACCELERATION-ROAD-ENGINE)
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RIDE AND EVALUATE AT 5 0 P.S.I. TIRE PRESSURE
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PLACE VEHICLE ON HOIST
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SEE TIRE CHECK
REMOVE REAR TIRES AND
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CHECK TIRES, SUSPENSION
AND/OR BODY COMPARTMENT
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REVERl FY PROBLEM SPEED
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I
i L
!PROBLEM IMPROVED CHECK AND/OR BALANCE TIRES
2545 M.P.H.
k
TIGHT JOINTS INCORRECT FRONT OR
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REAR JOINT ANGLE
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IMPACT YOKE WITH SET TO
HAMMER OR REPLACE SPECIFICATIONS
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VISUAL EXAMINATION
1
DAMAGE;) SHAFT UNDER~OATING MISSING ~ A L A N C E BURRS OR
AICKS
ON EXCESSIVE LOOSENESS
1
ON
, i "
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SUPPORT YOKE AND/OR AT SLIP YOKE SPLINE
PINION FLANGE
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PARTS
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REPLACE SHAFT CLEAN SHAFT BALANCE SHAFT REWORK OR REPLACE REPLACE NECESSARY
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EVALUATE ON HOIST
PROBLEM NOT IMPROVED
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I
PROBLEM IMPROVED
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5 5 7 5 M.P.H.
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ROTATE SHAFT lBOo AT PINION FLANGE
PROBLEM N p T IMPROVED-EVAL~ATE-PROBLEM IMPROVED
-
WORN~JO~NT OUT OF BALANCE D~IVELINE EXCESSIVE
1
PINION FLANGE OR SHAFT RUNOUT
REPLACE JOINT
t
BALANCE SHAFT I N CAR
ROAD' TEST