Is this a hub problem?
Sidebar: The threads on lubing the slip yoke are great! Took care of that problem last night and it drives like a new truck.
• NOISE—“SQUEALING” OR “WHISTLING” NOISE
FROM FRONT AXLE AREA—DRIVING AT SPEEDS
OF 16-64 KM/H (10-40 MPH)—4X4 VEHICLES
ONLY—REVISED FRONT OUTER HALFSHAFT
DUST SEALS
• FRONT AXLE—“SQUEALING” OR “WHISTLING”
NOISE FROM FRONT AXLE AREA—DRIVING AT
SPEEDS OF 16-64 KM/H (10-40 MPH)—4X4
VEHICLES ONLY—REVISED FRONT OUTER
HALFSHAFT DUST SEALS
This article is being republished in its entirety to
update the model applications covered.
This TSB applies to 2001 Explorer Sport/Sport Trac
4X4 vehicles, 1998-2001 Explorer/Mountaineer 4X4
vehicles (all build dates), and 2000-2001 Ranger
4X4 vehicles built after 11/1/1999 only.
ISSUE
Some 4X4 vehicles may exhibit a high-pitched
“squeal” or “whistle” type noise from the front of the
vehicle at speeds from 16 to 64 km/h (10 to 40
mph). This noise may be caused by the front
halfshaft excluder (dust) seals (-3K070-) as they
rotate against the inner front hubs. The noise may
be more pronounced in cold weather conditions.
ACTION
Install new front halfshaft excluder seals on each
side of the vehicle. Refer to the following Service
Procedure for details.
SERVICE PROCEDURE NOTE:
THE METRIC HUB REMOVER ADAPTERS
LISTED IN THE WORKSHOP MANUAL FOR THE
INSTALLATION/REMOVAL PROCEDURES ARE
INCORRECT. THE CORRECT TOOL NUMBERS
ARE D93P-1175-A AND D93P-1175-B.
Perform the following for each side of the vehicle:
1. Perform the front halfshaft removal procedure
per Section 205-04 of the appropriate model
year Workshop Manual.
2. Restrain the halfshaft assembly by the outboard
(wheel end) joint outer race. Clamp with a vise
on the exposed metal surface only. The CV
joint should be in an upright position (splined
end up). Be careful not to damage the boot or
boot clamp.
3. Remove the old seal by prying it off the shaft.
4. Clean the outer race of the CV joint of any
remaining foreign matter.
5. Install the new Front Halfshaft Excluder Seal
(YL2Z-3K070-AA) by pressing it onto the outer
race of the outboard CV joint by hand or with
an appropriate hand tool. All seal markings will
be facing the bell of the joint (away from the
stem).
NOTE: BE CAREFUL TO ONLY PRESS ON THE
EXPOSED STEEL PORTION OF THE SEAL.
START THE SEAL ON THE HALFSHAFT BY
HAND, AND THEN PRESS ON THE EXPOSED
STEEL PORTION OF THE SEAL IN 20 DEGREE
INCREMENTS AROUND THE SEAL UNTIL IT IS
FULLY SEATED AND PARALLEL TO THE CV
JOINT FACE. BE CAREFUL TO AVOID
DAMAGING THE RUBBER PORTION OF THE
SEAL.
6. Spread an approximately 3mm (1/8") thick bead
of High-Temperature Wheel Bearing Grease
(E8TZ-19590-A) onto the new seal lips.
7. Clean the inner surface of the knuckle
(-3K185-/-3K186-). This is the metal surface the
seals will ride against.
8. Perform the halfshaft installation procedure per
Section 205-04 of the appropriate Workshop
Manual.
9. Verify that the noise is no longer present.
PART NUMBER / PART NAME
YL2Z-3K070-AA / Seal - Front Halfshaft Excluder (Dust)
(2 Required Per Vehicle)
E8TZ-19590-A / Grease - High-Temperature Wheel Bearing
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The
Provision Of Bumper To Bumper Warranty Coverage
Ideas on reasonable cost to replace dustseals and the full hub replacement cost would be much appreciated. Also, comments on whether its prudent to try the dustseals first before doing the hubs would be helpful.
THX.,
John Mahan
Ideas on reasonable cost to replace dustseals and the full hub replacement cost would be much appreciated. Also, comments on whether its prudent to try the dustseals first before doing the hubs would be helpful.
Take the above TSB information back to the shop and tell them don't want or need the front "hub assemblies" replaced (there is no sealed front hub on a '98 Explorer, it uses a constant engagement system), you just want the dust seals replaced as described in he TSB. The seals are I'm sure are cheap, so the number they throw at you should be almost exclusively based on labor time.




