What kind of transmission fluid does a 2008 Mercury Mariner take?

The 2008 Mercury Mariner’s automatic transmission typically requires Mercon V transmission fluid. Confirm the exact specification for your vehicle by checking the owner’s manual or the transmission label, as configurations can vary by engine and market.

Understanding the transmission on the 2008 Mariner

The Mariner used a four-speed automatic transmission (the 4R44E/4R55E family) with its V6 or I4 engine options. Ford’s official guidance for these transmissions is centered on Mercon V ATF. Using the correct fluid helps maintain smooth shifting, proper lubricity, and seal integrity. If in doubt, always verify with the manual or a dealer, since some regional or late-production variants may have different recommendations.

Official specification and common compatibility notes:

• Mercon V automatic transmission fluid is the recommended fluid for the 4R44E/4R55E transmissions commonly found in the 2008 Mariner.


• Dexron VI is not recommended for these transmissions unless Ford explicitly approves it for your specific vehicle model and production date.


• Always confirm the exact specification by referencing your owner’s manual, the transmission’s tag, or a Ford/Mercury dealership if you are unsure.

In short, use Mercon V for a typical 2008 Mercury Mariner’s automatic transmission unless your documentation specifies otherwise.

Maintenance and service tips

Proper maintenance helps ensure longevity and reliable shifting. The following guidance applies to the commonly installed 4R44E/4R55E transmissions in the 2008 Mariner.

• Check the correct fluid type before servicing; rely on Mercon V unless your manual states a different spec.


• When servicing, consider a full transmission fluid replacement or a pan drop with filter change, following the service interval recommended by Ford (or a qualified technician).


• Always service the transmission with the engine warm and the vehicle on a level surface to obtain an accurate fluid level reading.


• Use the correct fill quantity as specified in your owner's manual or service guide; overfilling can cause foaming and shifting issues.

Following these steps helps ensure your transmission remains lubricated and shifts smoothly, matching the original manufacturer specifications.

Where to verify or purchaseFluid

If you want to double-check or purchase Mercon V, use reliable sources such as the vehicle’s manual, a Mercury/Ford dealership, or reputable auto parts retailers. Some retailers label Mercon V as compatible with Ford/Mercury automatic transmissions, but always confirm against your specific model and production date.

Summary

For most 2008 Mercury Mariner models with the common 4R44E/4R55E automatic transmission, Mercon V is the recommended transmission fluid. Always verify with the owner's manual, the transmission tag, or a dealer to ensure you’re using the correct specification for your exact vehicle configuration. Proper fluid type and maintenance help ensure smooth shifting and long transmission life.

What transmission fluid does a 2008 Mercury Mariner take?

FRAM – FRAM Mercon V Automatic Transmission Fluid, 1 Quart (Part No. F450)

Which transmission fluid is recommended?

The type of transmission fluid you should use depends upon the make, model and year of your vehicle. For example, many General Motor cars will require a DEXRON fluid and Ford cars commonly specify a MERCON fluid. Always follow the vehicle manufacturer recommendation for proper fluid use and change interval.

Can low transmission fluid cause stuttering?

If shuddering occurs primarily between 30-45 mph, this suggests torque converter problems related to low fluid levels. This specific speed range often reveals transmission issues that might not be noticeable at other speeds.

What kind of transmission does a Mercury Mariner have?

4-speed automatic