Re: towing weight with 4-runner
Just my opinion, but I would never consider towing so close to the rated max (assuming your 5,000 load and limit estimates are accurate). There's not enough margin for error. I share JB's recommendation...I'd strongly recommend a bigger truck.<br /><br />But if you have no other alternative, then definitely take every precaution you can take...including changing all fluids (transmission & transfer case especially), install external trans cooler, load distributing hitch, don't let tires wear past 50% tread, keep trailer and vehicle brakes in PERFECT working order...inspect them often, don't tow in overdrive, NEVER exceed about 50 mph, don't take on any significant hilly terrain, and make sure you don't take any luggage, family, or friends on your trips
since they'll push you well over your weight limit.<br /><br />Many people often forget when they see for example that a vehicle has a 5,000 lb towing limit, the "fine print" usually turns out basing this rating on about a 300 lb load on the tow vehicle. For most of us that covers a driver, a suitcase, and a 12-pack. Most of us have more than one person and gear on our truck, so that cuts into your towing capacity. So don't pay too much attention to the estimated tow ratings, but instead pay very close attention to the max GVWR sticker on your door jamb. This tells you the REAL numbers for the combined rig, but takes some math and patience to think through.<br /><br />Load your rig up, weigh it at a truck stop, and study your owner's manual very carefully. That's the best way to get accurate answers.