We have a 2006 River Forest Cedar Creek Silver Back 29' fifth wheel and cannot find the unloaded weight of the unloaded trailer. None of our paperwork has this information. We pull it with a 2500 diesel chevy and have pulled it for 6 years (but never on long pulls - 4 hours max) Within the last 2 to 3 years the transmission seams to have a hard time adjusting. The allision transmission keeps trying to calibrate. Just wondering if we are to heavy.