Depends on setup, 4,000+ would be a 1000 over what AS recommended for the 30 LY.
There are members here who have towed up to 10000 pounds, BUT they did modifications.
My PO did it but I could tell the difference between my ranger pickup at 4000 and the Honda Fit at 2500, the lack of speed from a traffic light, braking wasn't a problem as both used the ready brake.
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