Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Driveline System: Notes
The driveline system consists of the following components:
- Center support bearing
- Driveshaft assembly
- Front halfshafts
- Rear halfshafts
- Active torque coupling/rear axle
On Front Wheel Drive (FWD) vehicles, the transaxle transmits power from the engine to the halfshafts.
On All-Wheel Drive (AWD) vehicles, power is transmitted from the engine through the transaxle to the Power Transfer Unit (PTU). The PTU transfers engine power from the transaxle to the front halfshafts, and through the driveshaft to the active torque coupling/rear axle and halfshafts. For information on the PTU, refer to FOUR WHEEL DRIVE (4WD) SYSTEMS -- FUSION, MILAN & MKZ article or TRANSFER CASE - POWER TRANSFER UNIT (PTU) -- FUSION & MILAN article.
The engine angle is built into the engine mounts. If the engine angle is out of specification, the engine mounts must be inspected for damage. Refer to ENGINE MECHANICAL - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article, ENGINE MECHANICAL - 3.0L (4V) -- FUSION & MILAN article or ENGINE MECHANICAL - 3.5L -- FUSION & MKZ article.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.