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Just had a new differential installed in my 2002 dodge dakota. This included the posi track assembly as it was badly damaged due to a manufacturing falut from the factory. Anyway my problem is that there is now a high pitched whinning sound from the differential. I talked to the intsller and he says this is normal. Although it is not loud it does concern me. Should there be any noise coming from a new differential?

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No, there shouldn't be any kind of noise coming from the differential. A whining noise usually is the ring and pinion or a bearing.

Posted on Apr 30, 2010

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SECTION 205-02B: Rear Drive Axle/Differential — Ford 8.8-Inch Ring Gear 2003 Mustang Workshop Manual IN-VEHICLE REPAIR Axle Shaft Removal
  1. Raise and support the vehicle. For additional information, refer to Section 100-02 .
  1. Remove the wheel and tire assembly. For additional information, refer to Section 204-04 .
  1. Remove the rear brake disc (2C026). For additional information, refer to Section 206-04 .
  1. Remove the differential housing cover (4033) and drain the lubricant. For additional information, refer to Differential Housing Cover in this section.
  1. Remove the differential pinion shaft (4211).
    1. Remove the differential pinion shaft lock bolt (4241).
    1. Remove the differential pinion shaft.
  1. s3b~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-ring in the axle shaft groove.
    Remove the U-washer (4N237).
    1. Push the axle shafts (4234) inboard.
    1. Remove the U-washer.
  1. s3b~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Damage to the rear brake anti-lock sensor (2C190) may occur if it is not removed before the axle shaft.
    Carefully remove the rear brake anti-lock sensor. For additional information, refer to Section 206-09A .
  1. s3b~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the wheel bearing oil seal.
    Remove the axle shaft.
--------------------------------------------------------------------------------------
Rear Wheel Bearing and Axle Shaft Oil Seal Removal
  1. Remove the axle shaft (4234). For additional information, refer to Axle Shaft in this section.
  1. NOTE: If the wheel bearing oil seal is leaking, the axle housing vent may be plugged.
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Installation
  1. Lubricate the new rear wheel bearing with the specified lubricant.
  1. Using the special tools, install the new rear wheel bearing.
  1. Lubricate the lip of the new wheel bearing oil seal.
    • Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.
  1. Using the special tools, install the new wheel bearing oil seal.
  1. Install the axle shaft. For additional information, refer to Axle Shaft in this section.

-------------------------------------------------------------------
Installation
  1. Lubricate the lip of the wheel bearing oil seal
    • Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.
  1. s3b~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the wheel bearing oil seal.
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  1. s3b~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-ring in the axle shaft groove.
    Install the U-washer.
    1. Position the two U-washers on the button end of the axle shaft.
    1. Pull the axle shaft outward.
  1. NOTE: If a new pinion shaft lock bolt is unavailable, coat the threads with Threadlock and Sealer EOAZ-19554-AA or equivalent meeting Ford specification WSK-M2G351-A5 prior to installation.
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  1. Install the rear brakes. For additional information, refer to Section 206-04 .
  1. Install the tire and wheel assembly. For additional information, refer to Section 204-04 .
  1. Lower the vehicle.

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