I would think GCWR minus the loaded weight of the motorhome alone would yield the towing capacity. Obviously, you need to know the weight of the loaded motorhome. Alternately, you could use GCWR minus GVWR (assuming your motorhome is not loaded beyond GVWR).
Of course it would be further limited by the towing/tongue weight limits of the hitch itself which is usually on the hitch somewhere.
The transmission should be able to handle the full GCWR stated in the motorhome specs.
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When seconds count, the police are only minutes away.
2019 Newmar Canyon Star 3627 on a 2018 F-53 26K chassis w/6 speed transmission
2017 Jeep Wrangler JKU with Ready Brute tow system w/Currie Tow Plate
Titusville, FL when not on the road
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