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F9391 QP Gears Ring Pinion Rearend Axle Ford

fits make: Ford.

F9391 QP Gears Ring Pinion Rearend Axle Ford
More Information
BrandQP
Manufacturer Part NumberF9391
Part TypeRING PINION GEAR AXLE

Review QP New Inch Ford Gears Ring And Pinion 3.91 Ratio Rearend Axle 391 for FORD

QP F9391 Ford Rear End Axle Ring Pinion Gear 3.91: Superior Performance and Durability for Your Ford

The QP F9391 Ford Rear End Axle Ring Pinion Gear 3.91 is a top-tier replacement component designed specifically for Ford vehicles seeking enhanced performance and durability. This essential part of your drivetrain plays a pivotal role in transferring power from the differential to the wheels.

This ring and pinion gear set is engineered using state-of-the-art materials and manufacturing processes. The ring gear is precision-machined from high-strength steel, ensuring rigidity and longevity. The pinion gear, on the other hand, undergoes a meticulous heat treatment process to improve its strength and resistance to wear. The tooth profiles are carefully designed to provide optimal gear engagement and smooth power transmission.

The QP F9391 Ford Rear End Axle Ring Pinion Gear 3.91 is compatible with various Ford models, including but not limited to F-150, Explorer, and Expedition. It boasts a 3.91 gear ratio, providing an optimal balance between torque and RPM for various driving applications, including towing and off-roading.

Installation of this ring and pinion gear set is relatively straightforward, but it is recommended that the replacement process be performed by a professional mechanic to ensure proper alignment and setup. This new component comes with all necessary hardware for a hassle-free installation, including the ring gear, pinion gear, and any required bolts and seals.

By upgrading your Ford vehicle with the QP F9391 Ford Rear End Axle Ring Pinion Gear 3.91, you can expect improved power delivery, increased durability, and a more enjoyable driving experience. This component is an excellent investment for those who demand the very best from their Ford vehicle.

The Ford QP F9391 is a 3.91 rear end axle with a ring and pinion gear set. Here are some potential pros and cons of purchasing this part: Pros:

1. Improved Gear Ratio: A 3.91 gear ratio is suitable for towing heavy loads or for those who prefer a more aggressive acceleration.

2. Durability: The QP F9391 is made of high-strength materials, ensuring long-lasting performance.

3. OEM Quality: This part is an original equipment manufacturer (OEM) replacement, ensuring it fits and functions identically to the original component.

Cons:

1. Cost: The QP F9391 is a more expensive option compared to aftermarket alternatives.

2. Complex Installation: Installing a ring and pinion gear set requires specialized tools and technical expertise.

3. Availability: This part may not be readily available at local auto parts stores and may need to be ordered online or through a dealership.

In conclusion, the Ford QP F9391 3.91 ring and pinion gear set offers improved performance, durability, and OEM quality. However, the cost, complex installation, and potential availability issues may deter some buyers.

If you are looking for a high-performance axle with a 3.91 gear ratio and don't mind the higher cost and installation complexities, then the Ford QP F9391 is an excellent choice. On the other hand, if cost is a significant factor or if you are comfortable with aftermarket alternatives, you may want to consider other options.

Details:

9 Ford gears 3.91 ratio. Brand new 9 Ford standard weight ring pinion gears, ratio 3.91, part number F9391, 43/11 tooth count, 8620 heat treated material, 28 spline. Spools bearing kits also available.

specifications differentialsdepo:

  • for makes: Ford
  • brand: Qp
  • mpn: F9391
  • part type: Ring Pinion Gear Axle

general differentialsdepo:

  • category: Auto Parts > Transmission Drivetrain > Differentials, Assemblies > Additional

offer differentialsdepo:

  • availability: in stock
  • options: ship-to-home
  • in stock #: 2
  • price: $350.00
  • item condition: New
  • started: july 13, 2025
  • sold #: 15

shipping differentialsdepo:

  • type: fixed
  • service: ups ground, ups next day air
  • carrier: ups
  • class: standard, one-day
  • transit: 3-5 days

seller differentialsdepo:

  • city: ames, iowa
  • # reviews: 68097
  • rating: 100.0%

returns differentialsdepo:

  • policy: returns accepted
  • time: 30 days
  • paid by: buyer

payments differentialsdepo:

  • other
  • wallet: google-pay
  • credit card: visa
rating: 100.0% out of 100 based on 97 user ratings.
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