Taurus V6-182 3.0L FF (1995)
Fuse Block: All Technical Service Bulletins
A/T - AX4S/AX4N Driveline Noises
Article No.
96-8-7
04/08/96
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NOISE - AX4S/AX4N TRANSAXLE NOISES - SERVICE TIP
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TRANSAXLE - AX4S/AX4N - DRIVELINE NOISES - SERVICE TIP
FORD:
1991-96 TAURUS
LINCOLN-MERCURY:
1991-96 CONTINENTAL, SABLE
LIGHT TRUCK:
1995-96 WINDSTAR
This TSB is being republished in its entirety to update the procedures.
ISSUE:
There may be concerns of some different driveline noises coming from the transaxle under certain conditions on some vehicles. This TSB article has
been written to describe typical noises exhibited by the AX4N and AX4S transaxles and to assist dealers and technicians in knowing which noises are
expected and normal.
ACTION:
Refer to the following text to determine the correct procedure (if any) for the driveline noises.
"BUZZ"/VIBRATION IN "PARK" ON AN INCLINE - AX4S AND AX4N
The cause of the concern has been determined to be the park pawl providing a ground path for normal drivetrain vibrations. The concern can be
minimized by making sure the parking brake is applied. Do not attempt to service this condition at this time.
"BUZZ" NOISE IN TRANSAXLE ON ENGINE SHUTDOWN - Ax4S AND AX4N
This is due to voltage power being shut off to the Powertrain Control Module (PCM) relay on engine shutdown. With engine rotation still present (which
is still driving the transaxle pump) and the Electronic Pressure Control (EPC) solenoid now off, EPC and line pressure are high (high EPC pressure).
This condition is normal hydraulic noise within the pump and valve body. To confirm this symptom, apply the brake, place the transaxle into gear and
turn the engine off. If the noise is no longer present, then the noise can be considered normal hydraulic noise. Do not attempt to service this condition at
this time.
HIGH PITCHED "WHISTLE" FROM MAIN CONTROL AT NORMAL OPERATING TEMPERATURE AND TIPPING INTO THROTTLE - AX4S
This condition is normal hydraulic noise and will not cause a malfunction or affect durability of the transaxle. Do not attempt to service this condition at
this time. This "whistle" noise could also be caused by the three-port vacuum check valve in the vacuum supply line to the speed control servo.
METALLIC CLICK ON REVERSE ENGAGEMENT - AX4N
When the gear selector is moved from "Drive" or "Neutral" into "Reverse", a metallic click noise may be heard. Refer to TSB 96-5-9 for repair
procedures.
1996 TAURUS/SABLE WITH ENGINE AND TRANSAXLE NOISES HEARD IN THE PASSENGER COMPARTMENT
These noises may have two sources. The steering column shift cable may be contacting the fuse junction box under the instrument panel on the left side
of the steering column. Disconnect the cable from the shift column lever and reroute the cable above the fuse junction box. Reconnect the cable and
check the cable adjustment. Refer to the appropriate Service Manual, Page 07-05-22.
The second source may be the NC evaporator housing assembly-to-bulkhead seal. The fasteners may have become loose. Tighten the fasteners from the
engine compartment side. Refer to the appropriate Service Manual, Page 12-03A-39 for details.
OTHER APPLICABLE ARTICLES: 96-5-9
SUPERSEDES: 96-3-13
