Here's a breakdown of the likely culprits and why you shouldn't drive it:
* Power Steering Pump Failure: This is the most probable cause. If the pump is failing or has failed, it won't provide the hydraulic pressure needed to assist the steering. This makes steering extremely difficult or impossible. A failing pump can also cause whining noises.
* Power Steering Fluid Leak: A significant leak will deplete the fluid needed for power steering assistance, resulting in the same symptoms. Check your power steering fluid reservoir; it'll likely be very low or empty. Look underneath the truck for any visible leaks.
* Low Power Steering Fluid: Even if there's no leak, low fluid will cause the same issue. Check and top off the fluid (if you can safely do so; it might be extremely dangerous if the pump has failed), but this is just a temporary fix, if that's even the problem.
* Steering Gearbox Problem: Internal failure within the steering gearbox itself can also cause this. This is a more serious and costly repair.
* Brake Booster Vacuum Leak: While less likely to directly cause the steering issue, a significant vacuum leak in the brake booster can drastically reduce braking power ("wimpy brakes"). This vacuum often comes from the engine.
Why you shouldn't drive it:
Driving this truck is incredibly dangerous. The lack of power steering makes it difficult to control, especially in emergency situations. The weak brakes further exacerbate this risk. You could easily lose control, causing an accident.
What to do:
1. Have it towed: Call a tow truck immediately. Do not attempt to drive the vehicle.
2. Professional Diagnosis: Take it to a qualified mechanic, preferably one experienced with Ford F-350s. They can properly diagnose the problem and provide a safe repair.
3. Safety First: Your safety and the safety of others is paramount. Don't risk driving a vehicle with such critical failures.
Ignoring this problem could lead to a serious accident. Get it towed and professionally repaired as soon as possible.
