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| LIMITED SLIP AXLE CHATTER, SHUDDER, BINDING SENSATION, OR VIBRATION DURING LOW SPEED TURNING MANEUVERS |
FORD : | 2002-2004 Mustang, Explorer 2003-2004 Expedition 2004 F-150 |
| LINCOLN: | 2003 Navigator |
| MERCURY: | 2002-2004 Mountaineer |
2003-2004 Expedition, 2003 Navigator, 2004 F-150 vehicles equipped with a 9.75″ or 8.8″ limited slip rear axle, and 2002-2004 Explorer 4dr, Mountaineer, and Mustang vehicles equipped with 8.8″ limited slip rear axle, may exhibit a chatter, shudder, a binding sensation, or a vibration during low speed turns.
On 4X4 vehicles, the sensation may appear to be originating from the front axle or the steering gear.
First verify the condition. On 4X4 trucks ensure that the vehicle is in 2WD, to isolate the rear axle.
On all vehicles, turn the wheel fully right (or fully left) and then accelerate the vehicle.
If the condition is verified to be in the rear axle, replace the limited slip clutch pack.
SERVICE PROCEDURE
CAUTION: INSTRUCT THE CUSTOMER NOT TO TOW WITH THE VEHICLE FOR 500 MILES (805 KM) AFTER THIS REPAIR, TO ALLOW THE AXLE TO BREAK-IN PROPERLY.
Order and install the appropriate clutch pack, follow the instructions detailed in the Workshop Manual.
- 6L1Z-4947-A (9.75″ limited slip)
- F5AZ-4947-BA (8.8″ limited slip)
NOTE: INSTALLING A CLUTCH PACK INTO AN INDEPENDENT REAR SUSPENSION (IRS) AXLE IS DIFFERENT FROM INSTALLING A CLUTCH PACK INTO A SOLID-BEAM AXLE. BE SURE TO FOLLOW THE APPROPRIATE WORKSHOP MANUAL PROCEDURE.
INSTALLATION TIPS
- Be sure to install NEW circlips and halfshaft/wheel end nuts on IRS rear axle (not included in the service kit)
- Soak the new clutch packs in Additive Friction Modifier (XL-3) for fifteen (15) minutes prior to installation
- For IRS axles, the half shaft seals need to be replaced. Expedition and Explorer/Mountaineer applications should use seal kit part number 5L1Z-4A109-A. Removal of the half shaft excluder seal 1L2Z-1N013 may be required, if equipped, to facilitate re-assembly
- Refill axles with 4 oz. Additive Friction Modifier (XL-3) and the necessary amount of Rear Axle Lubricant (XY-75W140-QL), regardless of the axle lubricant system originally used in the axle. Fill to capacity recommended in the Workshop Manual
NOTE: AXLE FLUID REQUIREMENTS HAVE BEEN CHANGED. ALL VEHICLES BEING REPAIRED BY THIS TSB MUST HAVE REAR AXLE LUBE XY-75W140-QL INSTALLED, IN PLACE OF XY-75W90-QFEHP. AS PART OF THIS REPAIR, CHECK AND REPLACE IF NECESSARY THE CURRENT XY-75W90-Q”FEHP” METAL TAG, WITH A NEW 75W140 TAG (F3TZ-4121-AA). ADDITIONALLY, REMOVE THE MULTI-COLORED LABEL WHICH IS LOCATED ON THE RIGHT SIDE AXLE TUBE, OR BLOCK OUT ANY/ALL “FEHP” OR “75W90” REFERENCES ON THE LABEL.
| PART NUMBER | PART NAME |
6L1Z-4947-A  | 9.75″ Axle Clutch Kit |
| F5AZ-4947-BA | 8.8″ Axle Clutch Kit |
| 5L1Z-4A109-A | Axle Seal |
| XY-75W140-QL | Rear Axle Lubricant |
| XL-3 | Additive Friction Modifier |
| W710084-S439 | Nut (Wheel End) |
| 2L1Z-4B422-CA | Circlips (for 9.75″) |
| 1L2Z-4B422-BA | Circlips (for 8.8″) |
| F3TZ-4121-AA | Metal Tag – 75W140 |
- Country of Origin : China
- Package Dimensions: 1.778 L x 10.668 H x 1.778 W (centimeters)
- Fit type: Vehicle Specific
- Package Weight: 0.091 kilograms
- For use on certain limited-slip differentials to reduce chatter and hypoid gear noise levels
- Use according to owner guide recommendations
- Formulated for automotive use
- Added to lubricants to reduce the surface friction of the lubricated parts
- For use on certain limited-slip differentials to reduce chatter and hypoid gear noise levels
- Use according to owner guide recommendations
- Formulated for automotive use
- Added to lubricants to reduce the surface friction of the lubricated parts
- For Use in Limited-Slip Differentials to Reduce Chatter and Gear Noise. Stops Clutch Shutter in Rear Ends With Clutches. One Bottle Per Axle is all that is Needed. Tapered Cap Included with Every Bottle. 4oz.
- Look for the Vehicle Application Chart Below
- Made in the USA, By the Original Manufacturer
- Get it Fast Using your Prime Membership, This is NOT Drop Shipped. It is Straight From Amazon.
- No worries when you buy this Original Part and get it Fast with your Prime Membership
- Eliminates differential chatter and other noises (squeals, groans, etc. )
- Universally works in all makes and models with limited slip differentials including Ford, Chrysler and GM; for use in all final drives and limited slip posi-traction units
- Inhibits rust and corrosion and also safe for yellow metal
- Extends clutch pack and equipment life
- Reduces differential temperatures
- Positraction additive
- For use in any clutch-style limited slip
- Compatible with most mineral and synthetic oils
- Positraction Limited Slip Differential Additive
- When added to a conventional viscosity ATF such as Dex/Merc ATF, it will convert it to Mopar ATF+4, Toyota Type T-IV, Honda Z-1, Nissan Matic J, etc.
- When added to a low viscosity ATF such as Dexron VI or Mercon LV, it will convert it to Mercon SP, Dexron HP, Toyota WS, Honda DW-1, Nissan Matic K & S, KIA and Hyundai SP IV ATFs.
- Prevents overheating, Assists in freeing hung-up governors, Keeps valves free
- Provides for smoother shifting and reduces drive train power losses, Helps modify harsh shifts and makes them quicker in duration
- Maintains proper ATF viscosity in torque converters, Inhibits transmission fluid foaming and oxidation, thereby extending fluid life and Reduces transmission wear
- Instantly eliminates torque converter shudder
- Provides four times less wear than regular ATF
- The original transmission shudder fix
- Voted top product by transmission professionals
- Limited-Slip Differential Friction Modifier
- Designed For Clutch-Type Limited Slip Differentials
- Pack of 1
Last update on 2025-04-19 / Affiliate links / Images from Amazon Product Advertising API
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