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TSB 98-5A-04 Brake Vibration / Lug Nut Torque
IF THE IMAGE IS TOO SMALL, click it.

Publication Date: MARCH 18, 1998

FORD: 1972-97 THUNDERBIRD
1976-86 LTD
1976-97 MUSTANG
1981-97 CROWN VICTORIA
1982-88 EXP
1982-98 ESCORT
1984-94 TEMPO
1986-97 TAURUS
1988-93 FESTIVA
1989-97 PROBE
1994-97 ASPIRE
1995-98 CONTOUR
LINCOLN-MERCURY: 1979-83 MONARCH, ZEPHYR
1979-97 COUGAR
1980-83 MARK VI
1980-98 CONTINENTAL, TOWN CAR
1981-86 LYNX
1983-86 MARQUIS
1984-92 MARK VII
1984-94 TOPAZ
1986-97 SABLE
1987-89 TRACER
1987-97 GRAND MARQUIS
1991-94 CAPRI
1991-97 TRACER
1993-98 MARK VIII
1995-98 MYSTIQUE
LIGHT TRUCK: 1979-96 BRONCO
1979-97 ECONOLINE, F-150-350 SERIES
1984-90 BRONCO II
1984-97 RANGER
1986-97 AEROSTAR
1988-97 F SUPER DUTY
1991-97 EXPLORER
1993-97 VILLAGER
1995-98 WINDSTAR
1997 EXPEDITION
1998 NAVIGATOR

ISSUE: The use of air impact tools to tighten wheel lug nuts can lead to overtightened and/or unevenly tightened wheel lug nuts. Air impact tools typically used for wheel lug nut removal and installation can generate up to 475 N-m (350 lb-ft) of torque. Overtightened and/or unevenly torqued wheel lug nuts may cause:
> Brake vibration
> Distortion of the wheel hub
> Distortion of the brake rotor
> Brake rotor runout
> Damage to the wheel
> Damage to the wheel nuts and studs

ACTION: All wheel lug nuts should only be tightened to specification using a torque wrench or by using the Rotunda ACCUTORQ 164-R0314 or equivalent on a 1/2" drive air impact tool. The "ACCUTORQ" lug nut sockets limit the torque of the air impact tool, preventing overtightening or uneven tightening of the wheel lug nuts. The torque limiting devices (regulators) on air impact tools will not reduce the output torque enough to prevent overtightening of the wheel lug nuts.

NOTE: REFER TO THE APPROPRIATE SERVICE MANUAL OR THE CHART IN «FIGURE 1» FOR THE CORRECT WHEEL LUG NUT TORQUE SPECIFICATION. THE CHART IN «FIGURE 1» ALSO PROVIDES THE CORRECT "ACCUTORQ" LUG NUT SOCKET TO USE.

The "ACCUTORQ" socket is intended for lug nut installation, not removal. When using the "ACCUTORQ" socket, the output torque of the air impact tool must be set to 217-339 N-m (160-250 lb-ft), usually this will be the lowest setting on the air impact tool.

The "ACCUTORQ" lug nut sockets are available through Rotunda Equipment. The four-piece set (164-R0314) fits most Ford Motor Company cars and light trucks. The tool set consists of four (4) lug nut sockets and a storage case. The set can be ordered by calling Rotunda Equipment at 1-800-ROT-UNDA (768-8632).

CAUTION: AIR IMPACT TOOLS SHOULD NOT BE USED TO TIGHTEN WHEEL LUG NUTS UNLESS THE "ACCUTORQ" LUG NUT SOCKET OF THE CORRECT SPECIFICATION IS USED.

NOTE: DO NOT USE AIR IMPACT TOOLS ON LOCKING WHEEL LUG NUTS. THEY ARE TO BE HAND-TORQUED ONLY.

OTHER APPLICABLE ARTICLES:

SUPERSEDES: 97-17-6
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 301000, 303000, 306000
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For other TSBs, check here.

After this TSB was published, torque-limiting extensions became available so that any normal socket could be used, and only 4 extensions were necessary for most vehicles (65, 80, 100, 120)
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Ford 8.8" axle uses 10 lug studs D6AZ-1107-A ('83-00) 1/2" x 20 thread; 1-7/8" long; 29/64" shoulder length, 0.618" knurl Diameter
Dana 44IFS uses 10 lug studs D6TZ-1107-A ('83-96)
Ford TIB axle uses 10 lug studs D6AZ-1107-A ('94-96)

F-150 and Bronco with steel wheels use conventional 1/2-20 lug nuts,13/16" drive.
F-150 and Bronco with aluminum wheels use styled steel 1/2-20 bulge lug nuts,13/16" drive.
F-250 steel wheels use conventional 9/16-18 lug nuts,7/8" drive.
F-250 HD aluminum wheels use conventional 9/16-18 lug nuts,7/8" drive.
F-350 single rear wheels use conventional 9/16-18 lug nuts,7/8" drive.
F-350 and F-Super Duty dual rear wheels use flat (integral two-piece swiveling) 9/16-18 lug nuts,7/8" drive; conventional NOT permitted.

WARNING: When a wheel is installed, always remove any corrosion, dirt or foreign material present on the mounting surfaces of the wheel or the surface of the wheel hub, brake drum, or brake rotor that contacts the wheel. Installing wheels without proper metal-to-metal contact at the wheel mounting surfaces can cause the lug nuts to loosen and the wheel to come off while the vehicle is in motion, causing loss of control.


https://www.amazon.com/dp/B07SNGV1S5
https://www.amazon.com/dp/B07L1N4F9J
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RETIGHTEN to proper torque specifications at 800 km (500 miles) after any wheel change or ANY OTHER TIME the lugnuts have been loosened.



McGard is the OEM for Ford locking lug nuts (and POSSIBLY other lug nuts)
'80-96 trucks withOUT swingaway lug-mount spare (including '80-86 Bronco w/swingaway) require 20 lug nuts (or 16 and 4 locks).
'80-96 trucks WITH swingaway lug-mount spare (only '87-96 Bronco w/Type 2&3 swingaway) require 23 lug nuts (or 18 and 5 locks).
The factory lug wrench for '80-96 1/2-ton trucks is 13/16" (~21mm).

1/2-ton Lug Nut: (Made in USA)
(4 chrome,13/16" drive) McGard 64000
(4 black,13/16" drive) McGard 64030
(100 chrome,13/16" drive) McGard 69400
(100 chrome bulge, 3/4" drive) McGard 69410
(4 chrome bulge, 3/4" drive) McGard 64010
(4 black bulge, 3/4" drive) McGard 64029
(8 chrome extra-long, 7/8" drive) McGard 64805
(4 chrome Spline drive) McGard 65340
(4 black Spline drive) McGard 65340BK
(4 chrome Spline drive w/Blue Cap) McGard 65340BC
(4 chrome Spline drive w/Red Cap) McGard 65340RC
13/16" Spline drive adapter McGard 65300

1/2-ton Wheel Lock: (Made in USA)
(4 chrome, 3/4" drive) McGard 24138
(4 chrome tuner,13/16" drive) McGard 25240
(5 chrome, 13/16" drive) McGard 24530
(4 chrome, 13/16" drive) McGard 24197
(4 chrome Spline short w/Blue Cap, 13/16" drive) McGard 65330BC
(4 chrome Spline short w/Red Cap, 13/16" drive) McGard 65330RC
(5 chrome tuner, 13/16" drive) McGard 25540
(5 black tuner, 13/16" drive) McGard 25540BK
(4 black tuner, 13/16" drive) McGard 25340
(4 black tuner short, 13/16" drive) McGard 25330
(4 chrome, 3/4" & 13/16" drive) McGard 24130
(4 chrome short, 13/16" drive) McGard 24194
(4 chrome short, 3/4" & 13/16" drive) McGard 24193
(4 black short, 3/4" & 13/16" drive) McGard 24025
(4 chrome long, 3/4" & 13/16" drive) McGard 24198
(4 chrome extra-long, 7/8" drive) McGard 24109
(5 chrome, 3/4" & 13/16" drive) McGard 24538
(4 black, 3/4" & 13/16" drive) McGard 24038
(5 black, 3/4" & 13/16" drive) McGard 24548

1/2-ton Lug & Lock Kits: (Made in USA)
(16 chrome bulge & 4 locks, 3/4" drive) McGard 84550
(16 black bulge & 4 locks, 3/4" drive) McGard 84551
(16 black & 4 locks, 13/16" drive) McGard 84531
(16 chrome Spline short & 4 locks, 13/16" drive) McGard 65530
(16 black Spline short & 4 locks, 13/16" drive) McGard 65530BK
(16 chrome Spline short w/Blue Cap & 4 locks, 13/16" drive) McGard 65530BC
(16 chrome & 4 locks, 13/16" drive) McGard 84530
(16 chrome Spline & 4 locks, 13/16" drive) McGard 65540
(16 black Spline & 4 locks, 13/16" drive) McGard 65540BK
(18 chrome & 5 locks, 13/16" drive) McGard 84562
(18 black & 5 locks, 13/16" drive) McGard 84562BK
(18 chrome bulge & 5 locks, 3/4" drive) McGard 84563
(18 black bulge & 5 locks, 3/4" drive) McGard 84563BK