1998 Ford Windstar 3.0 liter engine No upshift from 1st gear when at engine is at normal operating temperature and the transmission fluid is warmed up. 15-20 minutes of driving will initiate the telltales of this concern with city driving. Parts are available from many sources. I purchased a replacement OEM part from RockAuto.com for $31 shipped. www.rockauto.com Please share this video to those in need of diagnosis and repair help. Thank You.