Hey Matthew, so we know your 2009 Forest River Wildcat would have an axle capacity of between 5.2k and 7k so the grease seal is going to have an outer diameter of 3.376 inch but it could have one of two inner diameters. If its 2.125 inch you'd need the part # GS-2125DL or if that dimension is instead 2.25 inch you'd need # RG06-070.
We don't have a way to know for sure what inner diameter seal you'd need though so only option is to measure. view full answer...
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