The concise answer: most 2017 Ford Transit Custom models use electric power steering (EPAS) and do not require any power steering fluid. If your van has hydraulic power steering, Ford’s guidance is to use a designated Power Steering Fluid (PSF) or an approved ATF such as a Dexron-type fluid, but always confirm the exact spec for your VIN in the manual or with a dealer.
In this article we break down how to tell which system your Transit Custom (2017) has, what fluids may apply, and how to handle top-ups or replacements safely. We’ll cover identification, fluid options, and practical maintenance tips so you can avoid common missteps.
System types in the 2017 Transit Custom
Ford’s 2017 Transit Custom line primarily uses electric power steering, but a hydraulic option may exist in certain markets or configurations. Here is how to distinguish them and what that means for fluid use.
Electric power steering (EPAS)
EPAS uses an electric motor and sensors to assist steering. There is no hydraulic fluid reservoir associated with steering, so no PSF or ATF should be added for this system. If you have EPAS, routine service focuses on electrical connections, battery health, and software diagnostics rather than fluid checks.
Hydraulic power steering (HPS)
In some older or specific regional configurations, hydraulic steering may still be used. These systems rely on a dedicated steering fluid reservoir. If your Transit Custom has hydraulic PS, you’ll find a PSF-capable reservoir, and the exact fluid specification should be followed precisely to protect seals and performance.
Determining which system you have
Use these steps to identify whether your van has EPAS or hydraulic steering and to guide your maintenance decisions.
- Check under the hood for a power steering reservoir. Absence of a reservoir or a label indicating EPAS usually means electric steering.
- Inspect the steering components: a hydraulic pump and hoses pointing to a reservoir suggest hydraulic PS.
- Consult the owner’s manual or your vehicle’s VIN-specific documentation for the exact system and fluid specification.
- When in doubt, contact a Ford dealer or service center with your VIN to confirm the steering type and required fluid.
Identifying the system is crucial because EPAS does not require PS fluid, while hydraulic systems do and must use the correct specification to avoid damage.
Fluid options for hydraulic power steering
If your Transit Custom is confirmed to use hydraulic power steering, follow the fluid guidance specified for your VIN. The options commonly cited in service literature include a Ford Power Steering Fluid (PSF). Some regional manuals may permit Dexron-family ATF, but never mix fluids unless Ford explicitly approves it for your vehicle’s VIN.
- Ford Power Steering Fluid (PSF) as designated by Ford for hydraulic PS systems.
- Dexron II/III automatic transmission fluid if explicitly approved by your manual for your market and VIN.
- Avoid engine oil, brake fluid, silicone fluids, or other non-designated liquids in the PS reservoir.
Always confirm the exact fluid type for your VIN before topping up or draining any PS fluid. If the reservoir labeling is unclear, seek professional guidance to prevent damage.
Maintenance tips and common issues
Steering systems deserve timely attention. Here are practical tips to keep your Transit Custom steering in good shape and to diagnose issues early.
- Look for leaks around the PS hoses and reservoir in hydraulic systems.
- For EPAS, ensure battery health and clean electrical connectors, as faults often originate from electrical or control modules.
- Follow Ford’s service intervals for steering diagnostics if you notice stiffness, noise, or warning lights.
Prompt attention to steering problems can prevent more serious drivetrain issues and help maintain safe handling.
Summary
In most 2017 Ford Transit Custom models, the steering system is electric (EPAS), so no power steering fluid is required. If a hydraulic power-steering setup is present, use only the fluid specified for your VIN—typically Ford Power Steering Fluid (PSF) or an approved ATF per Ford’s guidance—and never mix fluids. Always verify the exact specification via the owner’s manual or a Ford dealership based on your VIN to ensure proper maintenance.
Can I put any power steering fluid in my van?
Stick to One Power Steering Fluid for Safety and Performance
Mixing different brands of fluid may seem harmless, but it can lead to problems over time. For optimal performance and safety, it's best to use the same brand and type of fluid recommended for your vehicle.
What power steering fluid does Ford recommend?
Note: All power steering systems built between 1998 and 2012 require the user of MERCON® V fluid. Power steering systems build after 2012 require MERCON® LV. Refer to Workshop Manual or Owner's Guide.
Where to put power steering fluid in transit custom?
And then tell them to read the user manual before they do anything in this vehicle.
Does it matter what power steering fluid I need?
It's crucial to consult your vehicle's owners manual to determine the recommended type of power steering fluid for optimal performance.