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1999 Ford F350 DRW Rear Axle: Specs, Problems, And Solutions

Leana Rogers Salamah
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1999 Ford F350 DRW Rear Axle: Specs, Problems, And Solutions

The 1999 Ford F350 DRW (Dual Rear Wheel) is a workhorse of a truck, known for its robust capabilities and reliability. A crucial component of this truck's performance is its rear axle. Understanding the specifics of the 1999 F350 DRW rear axle is essential for maintenance, repairs, and upgrades. This guide provides a comprehensive look at the axle, covering its specifications, common issues, and solutions.

Understanding the 1999 Ford F350 DRW Rear Axle

The rear axle of the 1999 F350 DRW is designed to handle heavy loads and demanding tasks. It's a full-floating axle, meaning the axle shaft only transmits torque to the wheels and doesn't bear the weight of the vehicle. This design enhances durability and allows for easier maintenance.

Key Specifications

  • Axle Type: Full-Floating
  • Ring Gear Diameter: Typically 10.5 inches (Sterling 10.5 axle)
  • Axle Shaft Spline Count: 35 splines
  • Gear Ratios: Common ratios include 3.73, 4.10, and 4.30
  • Weight Capacity: Up to 10,000 lbs Gross Axle Weight Rating (GAWR)

Common Issues and Problems

Like any mechanical component, the 1999 F350 DRW rear axle can experience issues over time. Here are some common problems:

  • Leaking Axle Seals:
    • Description: Oil leaks from the axle seals, often visible on the inside of the wheels.
    • Causes: Worn seals, damaged axle shaft, or excessive axle shaft play.
    • Solutions: Replacing the axle seals, inspecting and potentially replacing the axle shaft, and addressing any axle shaft play issues.
  • Worn Wheel Bearings:
    • Description: Grinding or rumbling noises from the rear wheels, excessive wheel play.
    • Causes: Normal wear and tear, lack of lubrication, or contamination.
    • Solutions: Replacing the wheel bearings and seals, ensuring proper lubrication.
  • Differential Problems:
    • Description: Clunking noises, difficulty turning, or vibrations.
    • Causes: Worn gears, damaged carrier, or insufficient lubrication.
    • Solutions: Inspecting and replacing worn gears, repairing or replacing the differential carrier, and ensuring proper lubrication.
  • Broken Axle Shaft:
    • Description: Sudden loss of power to one wheel, loud snapping noise.
    • Causes: Excessive stress, overloading, or metal fatigue.
    • Solutions: Replacing the broken axle shaft.
  • Pinion Seal Leaks:
    • Description: Oil leaks from the front of the differential.
    • Causes: Worn pinion seal, damaged pinion shaft, or excessive pinion shaft play.
    • Solutions: Replacing the pinion seal, inspecting and potentially replacing the pinion shaft, and addressing any pinion shaft play issues.

Maintenance Tips

Regular maintenance can extend the life of your 1999 F350 DRW rear axle. Here are some essential maintenance tips:

  • Regular Fluid Changes:
    • Change the rear differential fluid every 30,000 to 50,000 miles, or as recommended in your owner's manual.
    • Use the correct type of gear oil specified for your axle.
  • Inspect Seals and Bearings:
    • Periodically inspect the axle seals for leaks and the wheel bearings for play or noise.
    • Address any issues promptly to prevent further damage.
  • Check for Leaks:
    • Regularly check for any signs of oil leaks around the differential and axle tubes.
    • Address leaks immediately to prevent fluid loss and potential damage.
  • Proper Lubrication:
    • Ensure all components are properly lubricated.
    • Use high-quality lubricants to reduce friction and wear.

Upgrades and Modifications

If you're looking to improve the performance or durability of your 1999 F350 DRW rear axle, several upgrades and modifications are available: — Sling Day Pass: Your Guide To Instant TV

  • Gear Ratio Changes:
    • Changing the gear ratio can improve towing performance or fuel economy.
    • Consider a lower gear ratio (e.g., 4.10 or 4.30) for better towing and hauling.
  • Limited-Slip Differential:
    • Upgrading to a limited-slip differential can improve traction in slippery conditions.
    • Options include clutch-type, gear-type (e.g., Detroit Locker), and electronic limited-slip differentials.
  • Aftermarket Axle Shafts:
    • Upgrading to stronger aftermarket axle shafts can improve durability, especially for heavy-duty applications.
    • Consider chromoly axle shafts for increased strength.
  • Differential Covers:
    • Aftermarket differential covers often feature increased fluid capacity and cooling fins to help dissipate heat.
    • These covers can improve the longevity of the differential components.
  • Air Lockers:
    • Air lockers provide maximum traction by locking both axle shafts together.
    • This is a good option for off-road use or extreme conditions.

Troubleshooting Guide

Problem Possible Causes Solutions
Leaking Axle Seals Worn seals, damaged axle shaft, excessive axle shaft play Replace axle seals, inspect/replace axle shaft, address axle shaft play
Worn Wheel Bearings Normal wear and tear, lack of lubrication, contamination Replace wheel bearings and seals, ensure proper lubrication
Differential Problems Worn gears, damaged carrier, insufficient lubrication Inspect/replace worn gears, repair/replace differential carrier, ensure proper lubrication
Broken Axle Shaft Excessive stress, overloading, metal fatigue Replace broken axle shaft
Pinion Seal Leaks Worn pinion seal, damaged pinion shaft, excessive pinion shaft play Replace pinion seal, inspect/replace pinion shaft, address pinion shaft play
Excessive Noise Worn gears, incorrect backlash, insufficient lubrication Inspect/replace worn gears, adjust backlash, ensure proper lubrication
Vibration Bent axle shaft, unbalanced wheels, worn U-joints Inspect/replace axle shaft, balance wheels, inspect/replace U-joints
Difficulty Turning Limited-slip differential malfunction, worn gears Inspect/repair limited-slip differential, inspect/replace worn gears
Loss of Power to One Wheel Broken axle shaft, differential problems Replace broken axle shaft, inspect/repair differential
Fluid Leaks (General) Worn seals, loose bolts, damaged housing Replace worn seals, tighten bolts, repair/replace housing
Overheating Insufficient lubrication, excessive load, high speeds Ensure proper lubrication, reduce load, reduce speed
Premature Wear on Components Improper gear oil, contamination, excessive loads Use correct gear oil, prevent contamination, reduce loads
Noisy Operation at High Speed Incorrect pinion depth, worn pinion bearing Adjust pinion depth, replace pinion bearing
Difficult Engagement of Gears Worn synchronizers (for manual transmissions), clutch issues (for manual transmissions), worn gears Inspect/replace synchronizers, address clutch issues, inspect/replace worn gears

FAQ

  1. What type of rear axle is in a 1999 Ford F350 DRW?

    The 1999 Ford F350 DRW typically comes with a full-floating Sterling 10.5-inch rear axle. This axle is designed for heavy-duty applications and is known for its durability.

  2. What are the common gear ratios for the 1999 F350 DRW rear axle? — Youth NFL Jerseys: Sizes, Styles & Top Players

    Common gear ratios include 3.73, 4.10, and 4.30. The specific gear ratio will depend on the truck's original configuration and intended use.

  3. How often should I change the rear differential fluid in my 1999 F350 DRW?

    It is recommended to change the rear differential fluid every 30,000 to 50,000 miles, or as specified in your owner's manual. Heavy-duty use may require more frequent fluid changes. — UFC Live Stream Guide: Watch Every Fight

  4. What are the signs of a failing rear axle seal?

    Signs of a failing rear axle seal include oil leaks on the inside of the wheels, a strong gear oil smell, and low differential fluid levels.

  5. Can I upgrade the rear axle in my 1999 F350 DRW for better performance?

    Yes, there are several upgrades available, including changing the gear ratio, installing a limited-slip differential, upgrading to stronger axle shafts, and adding an aftermarket differential cover.

  6. What is a full-floating axle?

    A full-floating axle is a design where the axle shaft only transmits torque to the wheels and does not bear the weight of the vehicle. This design enhances durability and allows for easier maintenance.

  7. How do I check the rear differential fluid level in my 1999 F350 DRW?

    To check the fluid level, remove the fill plug on the differential housing. The fluid level should be at or slightly below the fill plug opening. If it's low, add the appropriate gear oil until it reaches the correct level.

Conclusion

The rear axle is a critical component of the 1999 Ford F350 DRW, responsible for transmitting power to the wheels and supporting heavy loads. Understanding the axle's specifications, common issues, and maintenance requirements is essential for keeping your truck running smoothly. Regular maintenance, prompt repairs, and strategic upgrades can extend the life of your axle and enhance your truck's performance.

Call to Action

If you're experiencing issues with your 1999 F350 DRW rear axle, consult a qualified mechanic for diagnosis and repair. Regular maintenance and timely repairs will ensure your truck continues to perform reliably for years to come.

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