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lostrider
lostrider, Ford Technician
Category: Ford
Satisfied Customers: 3075
Experience:  ASE Master Technician, Ford Senior Master Technician,Diesel certified, ASE Master, 22 yrs FORD exp.
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1999 Ford F250: limited slip rear axle has a shudder..brakes..00 miles

Resolved Question:

My 1999 Ford F250 4x4 with limited slip rear axle has a shudder in the back end when turning. It appears to come from the back around the brakes. It has been doing this for the past 10,00 miles and it does not seem to affect the functioning of the truck. Any suggestions as to what it could be.
Submitted: 9 years ago.
Category: Ford
Expert:  lostrider replied 9 years ago.
HiCustomerthis is lostrider, the concern your having is a fairly common concern on the limited slip rear axles, the clutch packs in the rear axle are binding and will need to be replaced, Ford has a service bulletin out for that concern and here is a copy for you with the part numbers needed for the repair.
TSB
00-8-4
  • NOISE - "CHATTERING" 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
Publication Date: APRIL 6, 2000

FORD:1999-2000 E-150, EXPEDITION, F-150
LINCOLN:1999-2000 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 0.25mm (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" ring gear Traction-Lok axles or Clutch Pack Kit F75Z-4947-AB for 10.25" 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 NUMBERPART NAME
F75Z-4947-AAClutch Pack Kit (9.75" Ring Gear)
F75Z-4947-ABClutch Pack Kit (10.25" Ring Gear)

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

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