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USA Standard Gear ZP FSF9-31 Ford 9 Inch Spool 31 Spline Differential Component
$163.89

USA Standard Gear ZP FSF9-31 - 31 Spline Spool for Ford 9 Inch

The USA Standard Gear ZP FSF9-31 is a robust solution for those looking to enhance their vehicle's performance on the track or in off-road conditions. This spool is designed specifically for the Ford 9 inch rear end with 31 spline axles, ensuring a perfect fit and reliable operation.

Key Features:

  • Delivers 100% traction to both wheels, providing maximum power transfer during acceleration.
  • Engineered for high-performance applications, making it ideal for racing or off-roading.
  • Constructed with durable materials to withstand the rigors of demanding driving conditions.
  • Not recommended for street-driven vehicles, as it is optimized for competitive use.

Technical Specifications:

  • Part Number: ZP FSF9-31
  • Axle Spline Count: 31
  • Warranty: 1 year against manufacturer defects

Customer Feedback:

Many users have praised the ZP FSF9-31 for its performance, stating that it significantly improved their vehicle's handling and traction on the track. One customer noted, "I installed this spool in my Bronco, and the difference was night and day! I can finally put the power down without worrying about wheel spin." Another mentioned, "While it's not meant for street use, it's perfect for my weekend racing events." This product truly stands out for those who prioritize performance.

Fitment:

While specific fitment details are limited, the ZP FSF9-31 is compatible with the Ford 9 inch rear end. Please ensure your vehicle has 31 spline axles before purchasing.

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WARNING: Cancer and Reproductive Harm
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Vehicle Make/Model
Ford Bronco 1966-1974 Base
Ford Bronco 1968-1973 Wagon
Ford Bronco 1968-1969 Roadster
Ford Bronco 1975 Ranger
Ford Bronco 1975-1977 Sport
Ford Bronco 1975, 1978 Northland
Ford Bronco 1975-1986 Custom
Ford Bronco 1978-1981 Ranger XLT
Ford Bronco 1982-1983 XLT Lariat
Ford Bronco 1982-1983 XLS
Ford Bronco 1984-1986 XLT
Ford Bronco 1985-1986 Eddie Bauer
Ford Bronco II 1984-1986 Eddie Bauer
Ford Bronco II 1984-1986 Base
Ford Bronco II 1984-1986 XLT
Ford Bronco II 1984-1985 XLS
Ford E-100 Econoline 1969-1974 Club Wagon
Ford E-100 Econoline 1969-1982 Base
Ford E-100 Econoline 1975-1983 Custom
Ford E-100 Econoline 1975-1978 Northland
Ford E-100 Econoline 1975-1982 Chateau
Ford E-100 Econoline 1983 XL
Ford E-100 Econoline Club Wagon 1975-1978 Base
Ford E-100 Econoline Club Wagon 1975-1978 Custom
Ford E-100 Econoline Club Wagon 1975-1978 Northland
Ford E-100 Econoline Club Wagon 1975-1978 Chateau
Ford E-150 Econoline 1979-1982, 1984-1986 Base
Ford E-150 Econoline 1979-1983, 1987-1988 Custom
Ford E-150 Econoline 1979-1982 Chateau
Ford E-150 Econoline 1983-1988 XL
Ford E-150 Econoline Club Wagon 1979-1983, 1987-1988 Custom
Ford E-150 Econoline Club Wagon 1979-1982, 1984-1986 Base
Ford E-150 Econoline Club Wagon 1979-1982 Chateau
Ford E-150 Econoline Club Wagon 1983-1988 XL
Ford E-150 Econoline Club Wagon 1984-1988 XLT
Ford E-200 Econoline 1969-1974 Base
Ford E-200 Econoline 1969-1974 Club Wagon
Ford E-200 Econoline 1970-1974 Custom Wagon
Ford E-200 Econoline 1971-1972 Chateau Wagon
Ford E-250 Econoline 1975-1980 Chateau
Ford E-250 Econoline 1975-1980 Custom
Ford E-250 Econoline 1975-1978 Northland
Ford E-250 Econoline 1975-1980 Base
Ford F-100 1957-1979, 1983 Base
Ford F-100 1975-1982 Custom
Ford F-100 1975-1978 Northland
Ford F-100 1975-1981 Ranger XLT
Ford F-100 1975-1981 Ranger
Ford F-100 1977 XLT
Ford F-100 1978-1981 Ranger Lariat
Ford F-100 1982-1983 XLS
Ford F-100 1982-1983 XLT Lariat
Ford F-100 1982-1983 XL
Ford F-150 1975-1981 Ranger XLT
Ford F-150 1975-1981, 1984-1987 Ranger
Ford F-150 1975-1978 Northland
Ford F-150 1975-1987 Custom
Ford F-150 1976-1978, 1983-1986 Base
Ford F-150 1977, 1983-1984 XLT
Ford F-150 1978-1981 Ranger Lariat
Ford F-150 1982-1987 XL
Ford F-150 1982-1983 XLS
Ford F-150 1982, 1985-1987 XLT Lariat
Ford Fairlane 1957-1970 500
Ford Fairlane 1957-1969 Base
Ford Fairlane 1966-1967 500XL
Ford Falcon 1960-1970 Base
Ford Falcon 1962 Deluxe
Ford Falcon 1963-1970 Futura
Ford Falcon 1963-1965 Futura Sprint
Ford Falcon Sedan Delivery 1961-1965 Base
Ford Galaxie 1959-1967 Base
Ford Galaxie 1960 Special
Ford Galaxie 1961 Club Victoria
Ford Galaxie 1961 Sunliner
Ford Galaxie 1961 Town Victoria
Ford Galaxie 1961 Starliner
Ford Galaxie 500 1962-1964 Victoria
Ford Galaxie 500 1962-1964 Sunliner
Ford Galaxie 500 1962-1974 Base
Ford Galaxie 500 1962-1970 XL
Ford Gran Torino 1972-1975 Sport
Ford Gran Torino 1972-1976 Base
Ford Gran Torino 1972-1976 Squire
Ford Gran Torino 1973-1976 Brougham
Ford Gran Torino 1974-1975 Elite
Ford Granada 1975-1979 Ghia
Ford Granada 1975-1979 Base
Ford Granada 1978-1979 ESS
Ford LTD 1965-1979 Base
Ford LTD 1970-1976 Brougham
Ford LTD 1975-1979 Landau
Ford LTD 1975-1979 Country Squire
Ford LTD II 1977-1979 S
Ford LTD II 1977-1978 Brougham
Ford LTD II 1977-1979 Base
Ford LTD II 1977 Squire
Ford LTD II 1979 Landau
Ford Maverick 1970-1977 Base
Ford Maverick 1975-1977 Grabber
Ford Mustang 1965-1970 Shelby GT-350
Ford Mustang 1965-1973 Base
Ford Mustang 1966 Shelby GT-350H
Ford Mustang 1967-1970 Shelby GT-500
Ford Mustang 1968 Shelby GT-500KR
Ford Mustang 1969-1970 Boss 429
Ford Mustang 1969-1971 Boss 302
Ford Mustang 1970-1973 Grande
Ford Mustang 1970-1973 Mach 1
Ford Mustang 1971-1972 Boss 351
Ford Ranchero 1957-1971 Base
Ford Ranchero 1957-1958, 1966 Custom
Ford Ranchero 1967 500 XL
Ford Ranchero 1967-1979 500
Ford Ranchero 1968-1979 GT
Ford Ranchero 1970-1979 Squire
Ford Thunderbird 1955-1979 Base
Ford Thunderbird 1978-1979 Town Landau
Ford Thunderbird 1978 Diamond Jubilee
Ford Thunderbird 1979 Heritage
Lincoln Continental 1958-1979 Base
Lincoln Mark III 1968-1971 Base
Mercury Comet 1964-1965 404
Mercury Comet 1964-1965 202
Mercury Comet 1964-1969, 1971-1977 Base
Mercury Cougar 1967-1973, 1977-1979 Base
Mercury Cougar 1967-1979 XR-7
Mercury Cougar 1969-1970 Boss 302
Mercury Cougar 1969-1970 Cobra Jet
Mercury Cougar 1969-1970 Boss 429
Mercury Cougar 1977 Brougham
Mercury Cougar 1977 Villager
Mercury Grand Marquis 1975-1980 Base
Mercury Grand Marquis 1979-1980 Colony Park

USA Standard Gear Banner

Who is USA Standard Gear?

USA Standard Gear is a company that supplies high-quality parts for the automotive industry. They are a one-stop-shop for all your drivetrain component needs and have one of the industry's most comprehensive parts list and inventory. Today, they are considered the leading supplier of these parts in the United States.

Drivetrain Experts

The company offers various parts ranging from axles, differential gears, lockers, limited slips, drivelines, and more. It is built by a team of craftsmen who has years of experience when it comes to assembling and modifying their own builds. This passion is what drives the company to create some of the best products in the market.

Quality In Every Product

All their parts are manufactured in their facility equipped with the latest and most sophisticated tools available today. They also have two high-tech testing labs to ensure that every product comes out with the company's quality.

The USA Standard Gear engineering team is constantly on edge trying to find ways to develop and further improve their products. That is why they can produce innovative parts that adapt to the changing trend in the automotive world.

Purchase USA Standard Gear at Vivid Racing

If you are in the market for reliable and top-notched drivetrain components, then USA Standard Gear is the brand for you. With years of experience developing their products, they have provided their customers with parts they could trust, whether it's a replacement component or an upgrade. 

To know more about USA Standard Gear, visit Vivid Racing and check out their list of offerings that fit your specific requirement.





USA Standard Gear® ("USA Standard") warrants the original retail purchaser that all USA Standard products will be free from defects in materials and workmanship for the periods shown herein. USA Standard makes no other warranty of any kind, express or implied. All other warranties, including but not limited to an implied warranty of merchantability or fitness for a particular purpose, are excluded. This warranty is offered provided that the USA Standard product has been installed and maintained in accordance with USA Standard instructions, and that it has not been subject to modification, accident, abnormal use or misuse. At USA Standard's discretion, this warranty may be voided if installation of USA Standard product(s) occurs on vehicles with tires that exceed USA Standard Maximum Recommended Tire Size.

Upon notification of a warranty claim, USA Standard shall investigate the claim of defect, and, in the event of a verified defect, shall, at their sole choice, either repair the defective product or replace it.

This warranty does not cover, and USA Standard shall not be liable for, incidental or consequential damages, including loss of time, road service charges, labor charges, inconvenience, loss of vehicle use, loss of revenues, or loss or damage to personal property (including loss or damage to vehicle parts due to the failure of the USA Standard product). In addition, this warranty does not cover, and USA Standard shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling USA Standard Gear® products, except where such agreements are within the provisions of this Warranty statement. Also, this warranty does not cover damage to the axle caused by or facilitated by failure of a non-USA Standard component.

This agreement offers you specific legal rights. You may also have other rights which vary from state to state.

USA STANDARD GEAR® WARRANTY BY PRODUCT
USA Standard Product Length of Warranty (From date of sale) NOTES
SpoolAs long as original purchaser owns vehicle in which Spool is originally installed It is normal for Spools to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for Spool to function properly without premature wear.
Rear Axle (1040/1050)Five (5) Years Covers parts for five years against manufacturing defects.
Front Axle (Series ZA W)Five (5) Years Five year warranty covering manufacturing defects and axle breakage. This warranty is not transferable to another party. “No Questions Asked” replacement for first warranty return, however, USA Standard Gear reserves the right to either replace axle or refund original purchase price after the first warranty claim. USA Standard Gear (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Ring & Pinion Gear SetOne (1) YearWarrantied against manufacturing defects for one (1) year.
Positraction DifferentialOne (1) Year Exclusions apply, does not cover premature clutch wear or abuse. It is normal for Positraction differentials to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for differential to function properly without premature wear. Limited slip additive or appropriate friction modifier must be used with oil to reduce Positraction chatter.
Spartan LockerOne (1) YearWarrantied against manufacturers defects for one (1) year.
Install KitsOne (1) Year Includes ZBK, ZPK, and ZK. Covers parts for one year against manufacturing defects.
Spider Gear Kits (ZIK)One (1) YearOne year against manufacturing defects. Exclusions apply, does not cover clutch wear in limited slip differentials.
Replacement Driveshafts (ZDS)One (1) Year Warrantied against manufacturing defects for one (1) year.

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