Most common Ford services
- Power steering pump. F-Series Super Duty pumps fail with whining + leaking by 120k-180k miles. Pickup truck towing/hauling loads accelerate pump wear significantly.
- Brake booster + vacuum pump. 6.7L Powerstroke vacuum pumps are a known wear item — typically 80k-150k miles. Symptom: brake pedal goes hard intermittently, with brake-warning lamp + ABS faults.
- CV axles. Explorer (AWD), Edge, Escape, Fusion AWD all run CV axles that wear in the 80k-120k mile range. Clicking on turns is the leading indicator.
- Steering gear box. Super Duty (F-250 / F-350 / F-450) and older Expedition / Excursion use a heavy-duty recirculating-ball gear box. Sector shaft seal leaks are the most common failure mode.
Popular Ford models in service
F-150 (rack on modern, gear box on older — verify year), F-250 / F-350 / F-450 Super Duty (gear box + power steering + vacuum pump on diesels), Explorer (CV axles + rack-and-pinion), Edge (CV axles), Escape (CV axles + rack), Fusion (rack-and-pinion + power steering), Focus (CV axles), Taurus (rack-and-pinion + power steering pump), Excursion (gear box + vacuum pump), Expedition (gear box).
Notes worth knowing
Ford F-150 switched from gear box to rack-and-pinion in 2009 for the half-ton trucks. The Super Duty (F-250 and up) continues to use a gear box. Powerstroke diesel vacuum pumps live at the rear of the engine valley and are buried under the high-pressure oil pump on some years — verify accessibility before starting a DIY swap. Mercon V is the specified power steering fluid for most modern Ford applications; older units (pre-2007 mostly) may call for Mercon, which Mercon V replaces.
Common questions
- Does my F-150 have a steering gear box or rack-and-pinion?
- F-150 trucks 2008 and earlier use a recirculating-ball gear box. 2009 and newer use rack-and-pinion. Look under the front: a long horizontal tube spanning side-to-side = rack-and-pinion; a chunky cast-iron box on the driver-side frame rail = gear box.
- Why does my Powerstroke brake pedal go hard sometimes?
- Almost always a dying brake-booster vacuum pump. The Powerstroke diesel has no manifold vacuum, so the booster depends entirely on the dedicated pump. When the pump output drops below threshold, the booster runs out of stored vacuum and the pedal goes solid. Replace the pump before the next long drive.