What type of transmission fluid does a 7.3 powerstroke automatic take?
The short answer: Ford Mercon is the traditional choice for the 4R100 automatic used with the 7.3 Power Stroke, and Mercon V is widely compatible as a newer specification. Dexron (GM fluids) is generally not recommended. Always verify the exact spec for your year and transmission code in the owner's manual or on the transmission label.
The 7.3-liter Power Stroke, common in late-1990s to early-2000s Ford Super Duty trucks, paired with a four-speed automatic known as the 4R100, has seen fluid specifications evolve over time. This article explains the typical options, how to confirm the correct fluid for your truck, and best practices for maintenance to keep the transmission shifting smoothly.
Overview of the 4R100 transmission and fluid compatibility
The 7.3 Power Stroke is usually paired with the 4R100 four-speed automatic. Ford’s fluid recommendations have shifted from the original Mercon to the Mercon V specification in later service. Practically, Mercon remains the baseline specification, while Mercon V is widely accepted as a compatible and commonly used upgrade. Dexron fluids are not the standard recommendation for this transmission and may not be ideal for long-term reliability.
Transmission fluid options for the 4R100 in a 7.3 Power Stroke
Before listing the common options, note that exact requirements can vary by model year and transmission code. The following fluids are typically considered suitable for most 4R100 fills in 7.3 Power Stroke applications.
- Mercon — The original Ford specification for many 4R100 fills.
- Mercon V — A newer Ford specification that is backward compatible with Mercon and widely used today for improved performance.
Concluding paragraph: For most 7.3L Power Stroke trucks with the 4R100, Mercon or Mercon V is the recommended choice. Always confirm the exact specification for your year and transmission code via the owner's manual or a Ford dealer with your VIN.
How to verify the correct fluid for your truck
Because exact requirements can differ by year and production code, it’s important to confirm the specification that applies to your specific vehicle. Use these steps to verify the correct fluid:
- Check the vehicle’s owner's manual for the transmission fluid specification corresponding to your year and model.
- Look on the transmission dipstick or the tag under the hood for the exact specification printed there (Mercon or Mercon V).
- If in doubt, contact a Ford dealership or consult Ford’s official service documentation with your VIN for a definitive answer.
Concluding paragraph: Verifying the correct specification helps prevent shifting issues and potential transmission damage. When in doubt, using Mercon V is a widely accepted option that remains compatible with Mercon requirements for the 4R100.
Summary
The 7.3 Power Stroke’s automatic transmissions, typically the 4R100, normally require Ford Mercon, with Mercon V widely accepted as a compatible, up-to-date option. Dexron liquids are generally not recommended for this transmission. Always confirm the exact fluid specification for your year and transmission code through the owner’s manual, the transmission label, or a Ford dealer using your VIN to ensure proper maintenance and longevity.
What kind of transmission fluid does a 2000 Ford f250 7.3 take?
For a 2000 Ford F-250 with a 7.3L engine, the correct transmission fluid is Mercon V for automatic transmissions (4R100) and Mercon V ATF or Dexron III-H, Mercon for manual transmissions (ZF S6-650). Always check your owner's manual for the most accurate recommendation.
Automatic Transmission (4R100)
- Fluid Type: Mercon V ATF
- Alternatives: Dexron III-H, Mercon or other fluid specifically labeled as Mercon V compatible
Manual Transmission (ZF S6-650)
- Fluid Type: Mercon V ATF or Dexron III-H, Mercon
- Note: Some users suggest using a conventional 20-weight motor oil for manual transmissions, especially if gears are grinding. However, this is a non-standard recommendation and may require changing the fluid again to avoid long-term damage. Always prioritize the manufacturer's recommendation for the best results.
What kind of transmission fluid does a 99 f350 7.3 take?
FRAM – FRAM Full Synthetic Dexron VI Automatic Transmission Fluid, 1 Quart (Part No. F426)
Is all ATF +4 full synthetic?
Yes, ATF+4 is a synthetic automatic transmission fluid that is licensed by Fiat Chrysler Automobiles (FCA) to meet specific performance standards for Chrysler, Dodge, and Jeep vehicles. It is engineered to provide better thermal stability, reduced wear, and consistent shifting compared to conventional fluids.
- Composition: ATF+4 is a full-synthetic fluid designed to protect automatic transmissions in FCA (now Stellantis) vehicles.
- Licensing: The "ATF+4" designation is a registered trademark licensed by FCA, ensuring that products from different brands meet the same quality standards.
- Benefits: The synthetic formula offers superior performance over conventional fluids, including better protection against heat, oxidation, and wear, which extends transmission life.
- Usage: It is backward-serviceable, meaning it can be used in older transmissions that require ATF+, ATF+2, or ATF+3 fluids, and it is the standard for many newer models as well.
What type of ATF for 7.3 powerstroke?
| Transmission | Trans Fluid | Capacity |
|---|---|---|
| 4R100 4-Speed | Mercon V ATF | 17.1-17.7 quarts Dry Fill Capacity |
| ZF S6-650 6-Speed | Mercon V ATF | 5.8 quarts |
