What kind of transmission fluid does a 1999 Ford F-150 4.2 take?
The 1999 Ford F-150 with the 4.2-liter engine uses a 4R55E automatic transmission. The recommended transmission fluid is Ford MERCON ATF, or any Dexron II/III-compatible automatic transmission fluid. Always verify the exact specification for your vehicle with the owner’s manual or a Ford dealer using your VIN.
Overview: transmission type and fluid compatibility
The 4R55E automatic transmission common in late-1990s F-150s requires an ATF that meets Ford’s MERCON specification, which is compatible with Dexron II/III fluids. Using the correct spec helps ensure smooth shifting, proper lubrication, and long-term transmission health. While some owners rely on Dexron II/III-compatible fluids, Ford’s MERCON designation remains the baseline guidance for this era of transmission.
Why the right ATF matters
Automatic transmissions rely on precise friction properties, lubrication, and heat management. Using a fluid that does not meet the MERCON spec (or Dexron II/III compatibility) can lead to shifting problems, increased wear, or longer-term damage. If you’re unsure of your exact fluid spec, consult the owner’s manual or a Ford service technician for VIN-specific guidance.
What to use in a 1999 F-150 4.2
Before listing the common options, note that you should aim for a fluid that matches Ford MERCON or is explicitly compatible with Dexron II/III. The following options are typically acceptable for this transmission era:
- Ford MERCON automatic transmission fluid
- Dexron II/III-compatible ATF from reputable brands
- In some cases, Ford-approved Mercon-compatible fluids marketed as MERCON V may be acceptable if your service bulletin or manual indicates compatibility
In practice, using Ford’s MERCON ATF or a reputable Dexron II/III-compatible ATF is the safest path for a 1999 F-150 with the 4R55E. If you have a service bulletin or VIN-specific instruction from Ford, follow that guidance to avoid any compatibility issues.
Maintenance tips and service notes
Keeping the transmission fluid in good condition involves regular checks and periodic changes. The following guidelines can help you maintain the 4R55E transmission in your 1999 F-150:
- Check the transmission fluid level and condition when the engine is at operating temperature and the vehicle is on level ground.
- Look for a bright red color and a non-sour, non-burnt smell; dark or burnt fluid indicates a flush or change is due.
- When servicing, use the proper ATF specification (MERCON or Dexron II/III-compatible) and replace the filter if equipped.
- Follow the manufacturer’s recommended service interval for fluid changes, which is typically every 30,000–60,000 miles under normal conditions and more often under severe use.
Always ensure any transmission service is performed with the right fluid specification and by a qualified technician if you’re not comfortable performing the task yourself.
Summary
For a 1999 Ford F-150 with the 4.2L engine, the recommended transmission fluid is Ford MERCON ATF, or a Dexron II/III-compatible ATF. Use fluids that meet the MERCON specification and verify with your owner’s manual or dealer for VIN-specific guidance. Regular checks and proper fluid changes help keep the 4R55E automatic transmission shifting smoothly and reliably.
How much oil does a 4.2 L 6 cylinder take?
5 quarts Initial Fill.
How much transmission fluid does a 1999 F150 take?
The 1999 Ford F-150 transmission fluid capacity depends on the specific transmission, with total fill capacities ranging from approximately 13.2 to 17.6 quarts. For a pan drop and filter change, a realistic amount to refill is about 4 to 7 quarts. Always use the dipstick to confirm the final fluid level with the engine warm and running.
Transmission fluid capacity by model
- 4R100 transmission: Approximately 17 to 17.6 quarts for a total fill, depending on the specific version.
- 4R70W transmission: Approximately 13.2 quarts for a total fill.
- For a pan drop and filter change: 4 to 7 quarts is a typical amount, so add this amount and then check the level with the dipstick.
Important notes
- Always use the dipstick: The most accurate way to set the fluid level is by using the dipstick when the engine is warm and running, so only add the amount needed to reach the "full" mark.
- Fluid type: The recommended fluid for these transmissions has been updated from Mercon to Mercon V.
- No drain plug: Many 1999 F-150 transmissions lack a drain plug, so the fluid is typically removed by loosening the pan bolts and allowing the pan to angle down to drain.
What type of transmission fluid does a Ford F-150 use?
A Ford F-150 uses Mercon LV (low viscosity) automatic transmission fluid, often identified by the Ford part number XT-10-QLVC. While newer models require Mercon LV, older models may use Mercon V or Type F fluid, so it's crucial to check your owner's manual for the specific fluid type required for your vehicle.
For newer F-150s
- Transmission Fluid: Mercon LV
- Ford Part Number: XT-10-QLVC
- Specification: WSS-M2C938-A
- Type: Full synthetic is recommended
For older F-150s
- Mercon V: Some models might use this fluid
- Type F: Used in very old transmissions, and you can verify if this is needed in your specific model
Important notes
- Check your owner's manual: This is the most reliable way to confirm the correct fluid for your specific F-150, as the requirements vary based on the year and transmission.
- Use the correct specification: Using the wrong fluid can lead to transmission damage. Always make sure the fluid you purchase meets the Mercon LV specification (or the one specified in your owner's manual).
What kind of transmission fluid does a 1999 Ford f150 take?
FRAM – Dexron III / Mercon Multi-Vehicle Automatic Transmission Fluid: 1 Quart (Part No. F420)
