Towing

I bought a 2014 Mitsubishi Triton last August and it's now done 49,000km. I have just had new tyres fitted and a wheel alignment done, and the car is pulling to the left slightly and is light on the steering, and also oversteers into corners. I took it back to have it checked and it was pointed out that my rear springs were bending the wrong way, about 20mm in the centre unloaded, and it was suggested that this was the problem. Would this be the cause, or has the alignment not been done correctly?

My 1999 4.2-litre diesel Nissan Patrol has done 305,000km has been a great car and very reliable, but it's getting a little tired and it struggles to tow my boat. Would it help to fit a turbocharger?

We had to abort our caravanning holiday to the West Coast of Tassie when our 2015 Challenger could not tow our 1.49-tonne (tare) 6-metre pop top van in hilly country without overheating the automatic transmission, or the engine or both, causing frequent stops. The engine was also prone to pinging under load. After the engine coolant finally boiled we gave up and returned home, slowly. The caravan carried 130 litres of water, basic camping equipment and a week's rations. Its gross mass could not have exceeded 2 tonnes. The wagon carried two adults and a dog, 120L of fuel, 20Lof water, basic recovery gear, and a small toolbox (say 400kg max) giving it an estimated GVM of no more than 2.5-tonne. The estimated combined mass was therefore not more than 4.5 tonnes, well below the 5.65 tonnes specified maximum. All fluid levels were checked before departure, the tyres inflated to 36 psi on the wagon and the rear air bags to 20 psi. The caravan has tandem wheels with tyres inflated to 35 psi. It is well balanced, level and has always towed nicely. At no time did any warning light display. The transmission would simply go into "limp mode", dropping into second gear and requiring an engine restart. The engine temperature gauge needed to be watched as it often rose above the mid line. After the engine coolant boiled its level was checked again with no apparent leakage. I do not consider the Smart Bar, low profile driving lights or bash plates create air flow problems as our 2012 PB Challenger was identically equipped, plus a snorkel, and never had a problem with overheating. Does such a problem rate as a major failure? Is it sufficient to claim lemon status?

I'm towing my caravan currently with a Ford Territory Platinum diesel 2011. Should I keep it for another few years - it has 80,000 kilometres on it - or what should I replace it with that is economical, not too expensive and can tow about three tonnes?

Can a P-plater tow with the same weight restrictions as a full car licence holder?

I'm looking to buy a 4wd for towing, but I'm overwhelmed by the choices. Could you please suggest some ideal options suited to my brief, which is to tow a horse float with two horses, priced under $50,000, can be driven by a novice, and would be driven in town during the week and off-road on weekends.