Drivetrain› Differentials and Rear-End Components
FAST SHAFTS
Ring & Pinion Ford 9in 5.50
SKU: F03M F9-550
Moderate — 2–4 hours
Description
MIA's Description
It is specifically engineered for use with Ford 9-inch axles, offering a gear ratio suitable for a balance of acceleration and cruising.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | FAST SHAFTS |
| Part Number | F03M F9-550 |
Videos
Installing a Ring & Pinion Gear Set | Ford Performance | 1986-2014 Mustang
Ford 9 Inch Pinion Rebuild and Bearing Replacement
How to Install a 9 Inch Ford Ring & Pinion Gear Set
Ford 8in / 9in Ring and Pinion Gears Install. With Pinion Preload, Gear BackLash, Pinion Depth Tool
Ford Racing: Performance Half Shaft Kit | Performance Parts | Ford Performance
Ford 9 Inch: What You Need to Know About Ford's Champion Axle
US GEAR Strange Engineering Ford 9 Inch Ring and Pinion Installation
Mustang Gear Install: Ford Racing 8.8 Ring & Pinion | 1986-2009
How to install and use a notched crosspin shaft
HOW TO SET UP AND INSTALL NEW RING AND PINION | Ford 8.8
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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