Technical Service Bulletins
|Publication Date: MAY 27, 1997|
|1997 EXPEDITION, F-150, F-250|
A “ticking” noise during first gear operation may be heard on some vehicles. This may be caused by the transmission fluid transmitting the load from the intermediate clutch friction plates, which are rotating, to the intermediate clutch steel separating plates, which are non-rotating. This transfer of load produces a ticking noise as the steel separating plates make contact with the case.
Follow the Service Procedure below to verify the concern. If a ticking noise is verified, replace the Intermediate Clutch Friction Plates (F75Z-7B164-BA, 3 required). These new friction plates have a revised groove pattern which changes the fluid distribution and load between the clutch plates.
To Verify Concern
- Drive vehicle in manual first gear with light throttle position from 0 to 48 km/h (0 to 30 mph) and confirm the ticking noise.
- When the ticking noise is confirmed, shift the gearshift into manual second gear.
- If the ticking noise goes away in manual second gear, replace the intermediate clutch friction plates using service part number F75Z-7B164-BA (3 required).
Follow the normal Service Procedure outlined in the appropriate model 1997 Workshop Manual/Transmission Reference Manual.
NOTE: IF THE TICKING NOISE DOES NOT GO AWAY IN MANUAL SECOND GEAR, THEN THE INTERMEDIATE CLUTCH FRICTION PLATES ARE NOT THE CAUSE. DO NOT REPLACE THE FRICTION PLATES. REFER TO THE APPROPRIATE MODEL 1997 WORKSHOP MANUAL IN THE NOISE, VIBRATION, HARSHNESS SECTION (100-04) FOR FURTHER DIAGNOSIS AND DIRECTION.
|PART NUMBER||PART NAME|
|F75Z-7B164-BA||Intermediate Clutch Friction Plate (3 Req’d.)|
OTHER APPLICABLE ARTICLES:
504000, 590000, 597997, 702000