Rear Axle - Chattering On Turns Or Cornering

Article No.
98-11-7

06/08/98

^ NOISE - "CHATTERING" NOISE FROM REAR AXLE
HEARD ON TURNS OR WHEN CORNERING -
VEHICLES WITH LIMITED SLIP AXLE

^ AXLE - LIMITED SLIP - REAR AXLE "CHATTERING"
NOISE ON TURNS OR WHEN CORNERING

LIGHT TRUCK:
1997-98 E-150, EXPEDITION, F-150, F-250 LD
1998 NAVIGATOR

ISSUE
A "chattering" noise from the rear axle may be heard when turning or cornering. This may be due to differentials containing clutch packs that have been gauged too tightly.

ACTION
Install new Traction-Lok Clutch Pack Kit. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

1. Confirm axle chatter with road test.

2. Once axle chatter has been confirmed, remove and discard old clutch packs, shims and Belleville springs. Refer to the appropriate Workshop Manual for details.

NOTE
SUBTRACT 0.25 mm (0.010") FROM FEELER GAUGE READING TAKEN DURING SHIM SELECTION USING SERVICE TOOLS AND PROCEDURES INDICATED ON INSTRUCTION SHEETS PACKAGED WITH KITS.

3. Install Clutch Pack Kit F75Z-4947-AA for 9.75-inch ring gear Tracktion-Lok axles and Kit F75Z-4947-AB for 10.25-inch ring gear Traction-Lok axles. For ring gear size and differential type, see embossed metal tag attached to rear axle cover. Refer to the appropriate Workshop Manual for details.

PART NUMBER PART NAME

F75Z-4947-AA Clutch Pack Kit (9.75" Ring Gear)
F75Z-4947-AB Clutch Pack Kit (10.25" Ring Gear)

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME

981107A Install Clutch Pack (Drum 2.2 Hrs.
Brake Applications)

981107B Install Clutch Pack (Disc 2.4 Hrs.
Brake Applications Without

981107C Install Clutch Pack (Disc 2.5 Hrs.
Brake Applications With Air
Suspension)

DEALER CODING
CONDITION
BASIC PART NO. CODE
4026 56

OASIS CODES: 509000, 510000, 597997, 702000, 702200