Just guessing that in moving to the F-150, your trailer is now nose-high by 1 1/2"; logically the 4-Runner profile is lower, compared to the F-150, by at least that much. So I would first re-set your hitch to even-out the trailer. This means (again, guessing) lowering the hitch ball by one or two holes. A picture of your Freedom Express 192RBS hitched to the F-150 will help stir up some responses. Yes, you will need to continue using your weight distribution hitch as the 192RBS has a GVWR of 6,000 lbs.
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2017 Cherokee Grey Wolf 25RL
2017 Nissan Titan 4x4
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