USA Standard Gear ZG F10.25-538L Ring & Pinion Gear Set Ford 10.25" 5.38 Ratio
Upgrade your Ford truck or van with the USA Standard Gear ring and pinion set for 10.25-inch axles in a 5.38 ratio. This gear set fits 1985-2004 Ford F-150 F-250 F-350 and E-250 E-350 Econoline models delivering more low-end torque for towing and off-road use. Built to surpass OEM standards with full dimensional material and fitment testing for reliable performance.
Key Features
- 5.38 Gear Ratio – Increases torque multiplication for stronger acceleration and pulling power from low RPMs
- Exceeds OEM Specs – Precision machined gears from high-strength 8620 steel for durability under heavy loads
- Rigorous Testing – In-house evaluation ensures perfect dimensions material integrity and axle fitment
- Ford 10.25" Design – Direct replacement for Sterling 10.25-inch rear axles in F-Series and Econoline
- 43 Ring / 8 Pinion Teeth – Exact 5.38:1 ratio (43/8) for smooth quiet operation after break-in
- Left-Hand Rotation – Matches Ford OEM rotation for seamless installation
Specifications
| Detail | Value |
|---|---|
| Brand | USA Standard Gear |
| Type | Ring & Pinion Gear Set |
| Compatibility | Ford 10.25" Sterling Rear Axle |
| Gear Ratio | 5.38:1 |
| Ring Gear Diameter | 10.25 inches |
| Ring Teeth | 43 |
| Pinion Teeth | 8 |
| MPN | ZG F10.25-538L |
| Weight | 28 lbs |
| Shipping Dimensions | 20 x 16 x 10 inches |
| Country of Origin | South Korea |
| Warranty | 1 Year against manufacturing defects |
Whats Included
- 10.25" Ring Gear (43 teeth)
- Pinion Gear (8 teeth left-hand)
Product Notes
- Special order item ships within 1-3 business days
- Professional installation recommended uses proper setup tools and gear marking compound
- Requires axle rebuild with new bearings crush sleeve and seals for best results
- Break-in procedure essential drive 500 easy miles then change oil
This Part Fits
| Year Range | Make | Model | Notes |
|---|---|---|---|
| 1985-1986,1992-1998 | Ford | E-250 Econoline | Base |
| 1987-1991 | Ford | E-250 Econoline | Custom |
| 1985-1998 | Ford | E-250 Econoline | XL |
| 1985-1986,1992-1998 | Ford | E-350 Econoline | Base |
| 1987-1991 | Ford | E-350 Econoline | Custom |
| 1985-1998 | Ford | E-350 Econoline | XL |
| 2000 | Ford | F-150 | Base |
| 2004 | Ford | F-150 | FX4 |
| 2000-2003 | Ford | F-150 | Harley-Davidson Edition |
| 2001-2003 | Ford | F-150 | King Ranch |
| 2000-2004 | Ford | F-150 | Lariat |
| 2000-2003 | Ford | F-150 | Lightning |
| 2004 | Ford | F-150 | STX |
| 2000-2004 | Ford | F-150 | XL |
| 2000-2004 | Ford | F-150 | XLT |
| 1985-1986,1997-1998 | Ford | F-250 | Base |
| 1987-1992 | Ford | F-250 | Custom |
| 1995-1996 | Ford | F-250 | Eddie Bauer |
| 1997-1998 | Ford | F-250 | Lariat |
| 1995-1996 | Ford | F-250 | Special |
| 1985-1998 | Ford | F-250 | XL |
| 1993-1998 | Ford | F-250 | XLT |
| 1985-1992 | Ford | F-250 | XLT Lariat |
| 1999 | Ford | F-250 Super Duty | Lariat |
| 1999 | Ford | F-250 Super Duty | XL |
| 1999 | Ford | F-250 Super Duty | XLT |
| 1985-1986,1997 | Ford | F-350 | Base |
| 1987-1992 | Ford | F-350 | Custom |
| 1995 | Ford | F-350 | Eddie Bauer |
| 1995-1996 | Ford | F-350 | Special |
| 1985-1997 | Ford | F-350 | XL |
| 1993-1997 | Ford | F-350 | XLT |
| 1985-1992 | Ford | F-350 | XLT Lariat |
| 1999 | Ford | F-350 Super Duty | Lariat |
| 1999 | Ford | F-350 Super Duty | XL |
| 1999 | Ford | F-350 Super Duty | XLT |
Why Choose USA Standard Gear?
- Surpasses OEM specifications for strength and longevity
- Complete in-house testing guarantees fit and function
- Ideal ratio for heavy-duty towing and off-road demands
- Direct bolt-in replacement trusted by mechanics
Frequently Asked Questions
- Q: What vehicles does the ZG F10.25-538L fit?
- A: Fits 1985-2004 Ford F-150 F-250 F-350 and E-250 E-350 Econoline with 10.25" axles verify your submodel
- Q: What is the exact gear ratio and teeth count?
- A: 5.38:1 ratio with 43 ring teeth and 8 pinion teeth
- Q: Does this require any special setup?
- A: Yes use professional gear setup with preload backlash and pattern checks
Shipping & Handling
- Method: UPS Ground / FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Heavy-duty cardboard box with foam inserts for gear protection
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