FORD 1307-303-021 Gas Countershaft First Gear ZF5 S5-42 5.72

( Manufacturer Part Number: 1307-303-021 ), ( Type: Countershaft ), ( Oe/oem Part Number: Oem ), ( Vintage Part: Yes )

Review FORD Zf5 Gas Countershaft 5.72 First Gear fits F150 F250 F350 4X4 1987–1995

ZF 5-Speed Manual Transmission Countershaft for Ford F-150, F-250, F-350 (1987-1995) with 5.72 First Gear and Gas 4x4 (Part No: 1307-303-021)

This is a high-quality replacement ZF 5-speed manual transmission countershaft specifically designed for various Ford models including F-150, F-250, and F-350 trucks manufactured between 1987 and 1995. The countershaft is an essential component of the transmission system, and its primary function is to transmit engine power to the gears via the synchronizers and dog clutches.

The countershaft in question (Part No: 1307-303-021) is engineered to fit gas-powered 4x4 versions of these trucks and features a first gear ratio of 5.72:1. This gear ratio provides sufficient torque for towing heavy loads and handling challenging off-road conditions.

Constructed of robust, heat-treated steel, the countershaft ensures reliable performance and longevity. The precision machining and surface finishing of this component ensure smooth gear engagement, reducing wear and tear on other transmission parts.

Installation of the replacement countershaft is a straightforward process, requiring only standard hand tools. The new part comes with clear installation instructions to ensure a hassle-free experience for the vehicle owner.

By opting for this OEM-grade replacement countershaft, Ford truck owners can restore their vehicle's transmission to its optimal performance and enjoy the peace of mind that comes with a reliable, well-maintained drivetrain. This component is a worthwhile investment for those who frequently tow heavy loads, travel off-road, or simply want to keep their Ford truck in top condition.

Pros and Cons of Buying a Ford ZF5-S5-42 Countershaft for 1987-1995 F-150, F-250, and F-350 with 5.72 First Gear

a. Enhanced Performance: The ZF5-S5-42 countershaft is a high-performance upgrade for Ford F-150, F-250, and F-350 models with a 5.72 first gear ratio. It can provide smoother shifts, better torque multiplication, and improved overall power delivery.

b. Durability: The ZF5-S5-42 countershaft is a robust and reliable component. Its heavy-duty design can handle the demands of commercial and heavy-duty applications.

c. Compatibility: This countershaft is compatible with a wide range of Ford trucks, ensuring that many owners can benefit from this upgrade.

a. Cost: The ZF5-S5-42 countershaft is a premium upgrade, and its cost may be a significant investment for some buyers.

b. Complexity: Installing the countershaft requires a high level of technical expertise and specialized tools. It may not be a DIY project for most people.

c. Potential compatibility issues: While the countershaft is compatible with many Ford trucks, there may be some specific models or applications where it does not fit perfectly, which could lead to additional costs or complications.

The Ford ZF5-S5-42 countershaft is a high-performance upgrade that can deliver significant improvements in power, torque, and drivability for Ford F-150, F-250, and F-350 models with a 5.72 first gear ratio. However, it comes with a hefty price tag and requires a high level of technical expertise to install. Additionally, some potential compatibility issues may arise. Ultimately, the decision to purchase this countershaft depends on an individual's specific needs, budget, and technical abilities.

If you are a commercial or heavy-duty truck owner who demands maximum performance and reliability from your vehicle, the Ford ZF5-S5-42 countershaft may be a worthwhile investment. Ensure that you have a reliable mechanic or technician to install the countershaft and that your specific application is compatible. For casual truck owners or those on a tight budget, this upgrade may not be necessary. Instead, consider other, less expensive performance modifications or maintaining the stock components.

Details:

Up for sale is an OEM FordS5-42 ZF 5 Speed Manual Transmission4X4 Countershaft with 5.72 First Gear Ratio from a low-mileage, 91 F250 Gas4X4. Clean and in good condition. Tooth counts on gears are 57/21/31/45. Comes with everything you see in pics.

Shipping is $Free within the Lower 48 Continental US only. Expedited shipping available.

part #: 1307303021 prices

• $98.75-$164.88

specifications manutransmission:

• for models: F150, F250, F350, 4x4
• for makes: Ford
• for years: 1987-1995
• mpn: 1307-303-021
• type: Countershaft
• oe/oem part number: Oem
• vintage part: Yes

seller manutransmission:

• city: Delta, Colorado
• rating: 100.0%
• # reviews: 4789

offer manutransmission:

• options: Ship-to-home
• started: January 20, 2026
• best offers: True
• availability: In Stock
• quantity: 1
• sold: 0

general manutransmission:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Manual Transmission Parts

returns manutransmission:

• policy: No Returns

shipping manutransmission:

• class: Standard
• transit: 3-9 Days
• service: Standard
• type: Fixed
• cost: $0.00

payments manutransmission:

• other
• credit card: Mastercard
• wallet: Paypal

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