Hitch upgrade

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I have an 03 Sport V6 and currently have the stock bumper hitch. I am upgrading to the Drawtite 75155 hitch
,https://www.amazon.com/DRAW-TITE-75...coding=UTF8&psc=1&refRID=QCPHTSJR25YN2QAC8JMS.

The max load with weight distribution hitch says 7300lbs,on new hitch,would that be correct even with the V6 ? I wouldn't tow that much of course but I'm trying to get a better idea on the max towing.

Yes...BUT with a several caveats....first being if you noticed the specifications actually say..."Rated Weight Carrying Capacity 6000 pounds (GTW), Weight Distributing Capacity 7300 pounds (GTW)" the caveat here is the "Weight Distributing Capacity 7300 pounds" part which means you have to add another device called a "Weight Distributing Hitch" which is a device that attaches to the hitch shown and the trailer attaches to the WDH, what the WDH device does when setup properly transfers some of the towing weight to the front of the towing vehicle VIA the vehicle's frame, which helps eliminate rear sag of the suspension and greatly improves handling.
Also if you do install a WDH it is very important to learn how to adjust/set it up properly so it moves the weight towards the front of the vehicle, you can't just install it without setting it up properly, get a professional to show you how to do so correctly.

Secondly even with a WDH and especially without one when towing more than 3500 to 4000 Lbs. and less in some cases depending on tongue weight you will get the aforementioned rear sag, so I would recommend installing some air bags inside the rear coil springs which can be used to raise the rear back to a more normal height.

Thirdly, I'm not sure what weight you plan on towing and how regularly you will be doing so, but even towing 2000 to 2500 Lbs for most any distance more than a few miles you risk over heating the transmission fluid and thusly the transmission and possibly doing irreversible damage to the transmission, so I would highly recommend getting an auxiliary transmission cooler to help keep those temperatures within normal operating range, I would also recommend getting a OBDII dongle and the appropriate app so you can monitor the transmission temperature while towing, idea auto transmission operating temperature is approximately 175 degrees F, but up to around 190+ or so is not too bad as long as it doesn't stay there for a long periods of time, once you get above 200 degrees you are over heating the fluid and transmission but if lowered soon should do a lot of harm, so it best if you do reach those temperatures around 200+ to pull over and let the transmission cool off before proceeding further, also when doing towing regularly I would recommend having the transmission fluid by doing a complete fluid exchange, not just draining the pan and adding that much back in since the fluid could be depleted of it's lubricating properties from the high heat, just an FYI our transmissions hold around 12 quarts of fluid.

Hopefully this info helps you to tow without doing any damage to your vehicle and to do so safely.
 
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Thank you, yes I do have a weight distribution Hitch for the trailer and I've been contemplating air bags as well.

I will look into OBD product you were talking about
 
One caveat to the "ratings" on the hitch. The hitch could be rates for 10,000 lbs with a Weight Distributor hitch. You could do all the trans cooler upgrades, gearing, etc. But if you are even 1 pound over the Gross Vehicle Weight Rating with your trailer, you are breaking the law and running overload.

It doesn't matter if you've upgrades the brakes to 18" Rotors and 4 Piston Calipers, the GVWR on the sticker inside the door is the limit of your 4Runner, Trailer, and all cargo in the 4Runner and Trailer.

Understanding GVWR & Payload - Keep Your Daydream - Here's a perfect explanation of what I'm talking about.
 

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