I was wondering if anyone knows what the failing part was in this TSB? Why certain Ford 8.8 axles had this problem and not others? Should you consider using 75w140 instead in your Ford 8.8, even if your vehicle is not listed in this TSB?
Ford Explorer Rear End Whine/Hum
TSB 05-12-6
Vehicles:
2002-2005 Ford Explorers
2002-2005 Mercury Mountaineers
Issue:
Some vehicles listed above may have a whine/hum during acceleration, deceleration, and/or cruise.
Action:
Use axle repair kit to fix the issue. This kit should be used instead of installing a complete rear axle assembly. Replace the Ring and Pinion and it's components.
NOTE: When servicing the rear axle on these vehicles, replace the 75w-90 gear oil with 75W-140. If the axle is equipped with a Limited Slip, add the required amount of friction modifier (XL3). When replacing the fluid, replace metal tag with F3TZ-4121-AA tag.
Kit Part Numbers:
Time: 6.6 Hrs for Explorer/Mountaineer
Ford Explorer Rear End Whine/Hum
TSB 05-12-6
Vehicles:
2002-2005 Ford Explorers
2002-2005 Mercury Mountaineers
Issue:
Some vehicles listed above may have a whine/hum during acceleration, deceleration, and/or cruise.
Action:
Use axle repair kit to fix the issue. This kit should be used instead of installing a complete rear axle assembly. Replace the Ring and Pinion and it's components.
NOTE: When servicing the rear axle on these vehicles, replace the 75w-90 gear oil with 75W-140. If the axle is equipped with a Limited Slip, add the required amount of friction modifier (XL3). When replacing the fluid, replace metal tag with F3TZ-4121-AA tag.
Kit Part Numbers:
- 8.8" 3.55 Gear Ratio - 5L2Z-4209-AA
- 8.8" 3.73 Gear Ratio - 5L3Z-4209-C
Time: 6.6 Hrs for Explorer/Mountaineer