That does sound of concern as yes, the whole thing should be balanced if you've towed it unladen (or even in-fact in a laden state).
Daft question, but I assume the tyre pressure has been checked and equal to both tyres.
The Ranger will more than likely use the Alko Euro-Axle, which uses a rubber suspension tube in the axle for suspension; worst scenario might be a problem with this and would need checking by your dealer - see Alko information here
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Paul
Every day's a school day!
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