What is the benefit of changing the gear ratio to 3.55?

A 3.55 gear ratio typically offers improved acceleration compared to stock, while still providing reasonable fuel economy and lower highway RPMs than numerically lower ratios. It's a popular choice for a good all-around balance.

Does this ring and pinion set come with everything needed for installation?

This listing is for the ring and pinion gears themselves. You will typically need to purchase a separate installation kit, which includes bearings, seals, and installation hardware, as well as the correct gear oil for your differential.

How do I know if my Ford has an 8.8-inch rear axle?

The 8.8-inch rear axle is common on many Ford rear-wheel-drive vehicles. It's identifiable by its 10-bolt cover and the ring gear diameter of approximately 8.8 inches. Checking your vehicle's specific documentation or looking up its axle type is the best way to confirm.

Ford Racing 8.8in 3.55 Ring & Pinion M-4209-88355

Name: Ford Racing 8.8in 3.55 Ring Gear and Pinion
Brand: Ford Racing
Price: 252.33 USD
Availability: InStock

Ford Racing 8.8in 3.55 Ring Gear and Pinion

$252.33

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Ford Racing 8.8in 3.55 Ring Gear and Pinion. Improves drivetrain performance for many Ford vehicles.

Key Features

Fits 8.8 inch 10-bolt Ford rear differentials.
Features a 3.55 gear ratio for a balance of acceleration and cruising.
CNC-cut and lapped gear teeth for improved strength and quality.
Finished with a black oxide coating for corrosion resistance.
Made in the USA.
Considered standard in performance applications and race-proven.

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Will this fit your vehicle?

Product Details

If you're looking to change the gear ratio in your Ford's rear differential, a new ring and pinion set is the way to go. This 3.55 ratio set from Ford Racing is designed for the popular 8.8-inch Ford rear axle, which you'll find in a wide range of vehicles from Mustangs and F-150 trucks to Explorers and Crown Victorias. Changing your gear ratio can significantly impact your vehicle's performance, affecting acceleration and highway cruising depending on your driving needs.

Ford Racing builds these sets with CNC-cut and lapped gear teeth for improved strength and smoother operation. The black oxide coating helps resist corrosion, keeping the gears protected. Being a performance-oriented part, these are made in the USA and are considered standard in performance applications, offering OEM quality that's also race-proven. This 3.55 ratio is a popular choice for a good balance between off-the-line acceleration and manageable highway RPMs.

This set is designed to fit the 8.8-inch, 10-bolt Ford rear axle. Make sure to check the fitment data to confirm it's the right ratio and axle size for your specific Ford model. You'll also want to have the proper gear oil and any necessary installation tools on hand when you tackle this job.