Jim, the wheel capacity may be stamped on the inside of the wheel along with the air pressure rating. Might not, but easy to crawl under and check. I bet the change from the electric to hydraulic systems you mentioned would be ridiculously priced and worth nowhere near the price.
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2015 3100RL legacy...2005 Ford F-250 CC SB. Tows like a charm! 4/19 Updated to 2017 Chevy 3500 CC SB SRW -hope it tows as well as my F 250 did!
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