Dakota 4WD V6-239 3.9L VIN X FI (1989)
Propeller Shaft: All Technical Service Bulletins
Driveshaft - Howling Noise From 55 to 75 MPH
Models
1988-1989 N/AN Body 2WD With A500 Automatic Transmission
Subject
Howling Noise During Operation From 55 to 75 MPH
Index
PROPELLER SHAFT AND UNIVERSAL JOINTS
Date
November 13, 1989
No.
16-01-89
(C16-01-9)
P-3955
BODY CODE LEGEND
N/AN - DODGE DAKOTA/DAKOTA SPORT (RWD, 4WD)
SYMPTOM/CONDITION
Howling noise/vibration experienced during throttle tip-in or "float" operation in the 55-75 mph range.
DIAGNOSIS
Road test the vehicle for the howling noise/vibration in the 55-75 mph range. The noise is experienced during throttle tip-in or when throttle position is
slightly less than cruise, but not at a total decel position (referred to as a "float" condition). The howling sound is induced by imbalance in the automatic
transmission/prop shaft system. If the noise is present during these conditions, perform the following special balance procedure.
PARTS REQUIRED
2 3" I.D. Screw Type Hose Clamps (112" wheelbase) NPN 2 4" I.D. Screw Type Hose Clamps (124" wheelbase) NPN 2 4-1/2" Screw Type Hose
Clamps (131" wheelbase) NPN
Stainless steel hose clamps may be obtained locally.
REPAIR PROCEDURE
1.
Raise vehicle on a hoist.
2.
Mark the propeller shaft at four 90~ intervals (at the front end of the prop shaft, rearward of the tube yoke weld and forward of the balance
weights) and number them 1 through 4.
