Free Shipping
to commercial address
Shop Used Ford Explorer Sport-trac Transmissions
The Ford Explorer Sport Trac transmission depended on model year and drivetrain. First-generation Sport Tracs from 2001 to 2005 used the 5R55E 5-speed automatic, paired with either the 4.0L SOHC V6 or the 4.6L V8. Second-generation models from 2006 to 2010 used the 5R55S 5-speed automatic across all trims. Both units featured Sport, Select, and Regular shift modes and were designed to handle the Sport Trac's combination of passenger and light truck duties.
Common Ford Explorer Sport Trac Transmission Problems
The most frequently reported Ford Explorer Sport Trac transmission problems include harsh or erratic shifting, delayed engagement in cold weather, slipping under light load, and in some cases complete loss of third or fourth gear. The 5R55S is known for band adjustment issues that cause shift flares and slippage as mileage increases. Wear on the servo bores and accumulator pistons are well-documented failure points in both the 5R55E and 5R55S units.
How Long Does the Sport Trac Transmission Last?
Under normal use with regular Mercon V fluid changes, the Sport Trac 5-speed automatic typically lasts 120,000 to 160,000 miles. Extended drain intervals, towing beyond the rated capacity, and use of incompatible fluid are the primary causes of early failure. Ford specifies Motorcraft Mercon V for both the 5R55E and 5R55S — using Mercon SP or generic ATF in these units is a known cause of shift quality decline.
Replacement Overview for the Sport Trac Transmission
A used Ford Explorer Sport Trac transmission is the most common replacement path given that new OEM units are no longer in production for most of these model years. A quality used 5R55S or 5R55E unit from a low-mileage donor typically costs $1,200 to $2,500 before labor. Verifying that the unit matches the year, drivetrain (2WD vs. 4WD), and engine is essential before ordering.
Frequently Asked Questions
What transmission does the Ford Explorer Sport Trac use?
First-gen models use the 5R55E 5-speed automatic. Second-gen 2006–2010 models use the 5R55S 5-speed automatic.
Are Sport Trac transmission problems common?
Yes. Both the 5R55E and 5R55S have well-known issues with servo bores, band wear, and accumulator pistons that can lead to shift flares and gear slippage.
What fluid does the Ford Explorer Sport Trac transmission require?
Motorcraft Mercon V is the correct fluid for both the 5R55E and 5R55S. Mercon SP is not a substitute and can cause shift quality issues.
Can I use a standard Explorer transmission in my Sport Trac?
In many cases yes, as the Sport Trac shares its platform with the Explorer. However, you must confirm the same generation, drivetrain, and engine combination for proper fitment.