Here at orangespanner we understand that your Ford Transit needs the correct power steering fluid. It doesn't need changing as regularly as your engine oil it is important to know which power steering fluid you need and how often you need to change it. Please follow the manufacturers guidlines for service intervals however in some cases the manufacturer doesn't list a service interval. If this is the case we would recommend changing your power steering fluid at least every 5 years. Please refer to your manual or power steering fluid bottle cap to determine the correct fluid. Using the incorrect fluid could lead to expensive repairs to the steering rack or hydraulic pump.