Mustang V8-4.6L (2009)
Transmission Mount: All Technical Service Bulletins
Drivetrain - Shudder On Acceleration
TSB 08-23-4
11/24/08
SHUDDER ON ACCEL - POSSIBLE WRONG TRANS
CROSSMEMBER ASSEMBLY INSTALLED (EXCLUDES
GT 500)
FORD:
2005-2009 Mustang, Mustang
ISSUE
Some 2005-2009 Mustangs vehicles (Excludes GI 500), equipped with either a 4.0L or 4.6L engine, may exhibit a heavy driveline shudder on
acceleration from a stop or between 3-15 MPH (5-24 Km/h). On 4.0L engines there may also be an above average engine presence. The wrong
transmission crossmember assembly may have been installed from the factory. Similar complaints may also occur if the transmission crossmember and
transmission support insulator were improperly reassembled after transmission removal.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1.
Inspect the transmission crossmember assembly orientation. (Figure 1)
^
4.0L V6 vehicles - Transmission crossmember hump should extend downward. Transmission support insulator (trans mount) should have a
blue paint dot.
NOTE
EXHAUST MOUNTS AND ISOLATORS, SHOWN IN FIGURE 1, WERE PRODUCTION ASSEMBLY AIDS AND ARE NOT REQUIRED.
THEY WERE DELETED ON VEHICLES BUILT AFTER 12/03/2007 AND MAY HAVE ALREADY BEEN REMOVED PER TSB 08-3-4.
2.
If the vehicle is found to have the wrong transmission crossmember, then remove the transmission crossmember per Workshop Manual (WSM),
Section 502-00.
3.
Remove the transmission support insulator (transmission mount) from the transmission crossmember.
4.
If present, remove and discard exhaust mounts and isolators from the transmission crossmember. The transmission crossmember exhaust mounts
and isolators are a production assembly aid and are not required. Do not cut off the hanger rod from the exhaust system.
5.
Orient the original transmission crossmember to match engine. (Figure 1)
6.
Install new engine-specific transmission support insulator (transmission mount) onto transmission crossmember. (Figure 1)
7.
Torque transmission support insulator (trans mount) nuts to 52 lb-ft. (70 N.m).
8.
Install the transmission crossmember per WSM, Section 502-00.
