Technical Service Bulletins
|Publication Date: October 6, 2003|
|1996-1997 F-250 HD, F-350|
Article 97-9-20 is being republished in its entirety as part of a consolidated 7.3L diagnostic aid booklet.
A “moaning” noise during 1500-2000 RPM on neutral engine run-up, or while driving under load, may be heard on some vehicles. This may be caused by the noises transmitted from the powertrain-to-frame connections.
Repair or replace the following areas:
- Engine mounts
- Transmission mount
- Transmission crossmember
- Engine position in the vehicle
- Exhaust tuning code
- Exhaust hanger isolators
Refer to the following Service Procedure for details.
- Remove the catalytic converter exhaust hanger rod which is outboard or closest to the right frame rail on vehicles built prior to 2/23/96. This will leave one hanger rod from the front converter pipe to the bracket for improved exhaust resonance isolation. For location, refer to the 1996 F-Series Powertrain/Drivetrain Service Manual, Page 09-00-07, View “A”.
- Replace the RH engine mount with revised Engine Mount (F7TZ-6038-CA) on vehicles built prior to 1/17/97.
- Make sure the engine is “decked” in the frame without binding the engine and transmission by leveling the engine as follows:
- Back out the four (4) nuts on the engine mounts.
- Observe the location of the engine mount’s bottom stud on the left and right hand side to the crossmember’s key hole slot.
- Position the engine so that the bottom engine mount stud is the same distance from the bottom of the slot on the left and right side within 1mm.
- Tighten the engine mount nuts to 96-127 N-m (71-94 lb-ft).
- Replace the transmission mount with Transmission Mount (F6TZ-6068-B) on vehicles built prior to 8/12/96.
- Retorque the transmission crossmember by using the procedure referred to in TSB 97-3-10, (D) Transmission Crossmember, to relieve any binding or stress that may be present.
- Re-evaluate the vehicle for improvement.
|PART NUMBER||PART NAME|
|F7TZ-6038-CA||Engine Mount (RH)|
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