Quigley Motor Company is the only company that has qualified for the Ford’s Special Vehicle Engineering (SVE) program for 4×4 systems on Transit models. This provides access to Ford’s Drop-Ship and Ship-Thru (Low Roof Only – Medium and High Roof to be determined) for reduced shipping costs to dealers in all 50 states and ensures you retain your factory warranty on the unaltered portion of your vehicle (engine, transmission, rear axle, etc). Quigley 4×4 conversion is available on the Passenger and Cargo Vans with a GVWR 250 or 350. Per Quigley, "We are confident that this new IFS (Independent Front Suspension) system will prove every bit as durable as our other Quigley IFS systems based on our years of experience and detail and design." The 4×4 system raises the Transit roughly 2".