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Old 05-14-2019, 02:21 AM #16
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Quote:
Originally Posted by Volke View Post
Actually, tow ratings are mostly based on cooling capability, brakes for long downhill roads where they can overheat and wheelbase for stability at speed. Towing a boat 6000 lb boat 2 blocks won't do anything to your coolant and transmission temperatures. Torque transfer through the transmission is based on engine output, so whatever you try to pull won't hurt it. It's lack of cooling that breaks transmissions when towing. The brakes can manage for 2 blocks no problem and you don't have to worry about trailer sway at low speed.

Also, at 10% tongue weight, you won't be anywhere near max load of the tires. The stock 265/70R17 tires should be good to at least 2000 lbs depending on the brand, and you'd struggle to get much past 1500 lbs per tire with the boat attached unless you seriously mess up the tongue weight.

It really depends on how steep the ramp is and how well it is maintained. Biggest problem will be traction trying to pull the boat up the ramp and maybe the 4Runner doesn't weigh enough to prevent being pulled in if you have a steep and not well kept or wet ramp. For steep ramps, I'd say maybe go for it with 4Lo on the ramp if you want to risk sinking the 4Runner, but not a good idea with a 4x2.

For more gentle slopes, it will be fine.


Great information. Thank you. I do understand all of the ratings and mechanical considerations that go into tow ratings. Everything you said is correct and great for those who don’t understand. My point is about the inherent risk and liability of doing so. I know the temps won’t be a huge issue going such a short distance but again, the risk associated with exceeding recommendations is not worth the reward.

I have pulled many trailers and do so under emergency situations and responses for my job. I have launched boats from very unconventional locations and I’ve watched 3/4 ton 4x4 pickups get stuck on ramps with appropriate tow ratings for the boat. I actually helped recover one just the other day at training using my 4Runner. This boat far exceeds the recommended ratings of the Runner. Just because you “could” do something doesn’t mean you “should.”

OP, at the end of the day, it’s your rig and your boat and your ass if something goes wrong. If this is gonna be a common occurrence for you, I’d strongly consider getting an appropriate rig but hey, it’s your party. Please don’t hurt anyone else along the way.


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Old 05-14-2019, 03:27 AM #17
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If Tundra can pull the space shuttle, I think the 4Runner will manage your boat just fine........

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Old 05-14-2019, 06:56 AM #18
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Forget all the nonsense about needing 4WD to pull the boat out. Keep in mind most trucks have the highest towing capacity without 4wd. Additionally, consider the additional weight you'll have over the rear tires. I'd launch my boat (190 Boston whaler outrage w/dual axle trailer, with a full tank and gear i was pushing about 6000) out of the canaveral launch and its pretty steep, only used 2wd. You'll be fine, just keep it in low gear and keep the tires off the slimy stuff.

That being said, a pic of the launch ramp and boat would help.
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Old 05-14-2019, 07:59 AM #19
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Quote:
Originally Posted by YelloLab View Post
Much bigger 4x2 trucks rated for the weight fail on the ramp. If the ramp is wet and slippery on the bottom you will loose both truck and trailer. Here in Florida it happens every weekend. Go on youtube and watch.
And thousands more succeed every weekend. Nobody in Florida has 4wd.

This thread is silly. Nobody's gonna die pulling a slightly overweight trailer 2 f'ing blocks. Your Runner will do just fine as long as you can get traction. Be sure to check out the ramp conditions first then get video to show all of these ninnies.

It's amazing to watch trucks get bigger, heavier and more powerful every year but somehow the weight they can tow keeps going down. But don't listen to me - I've been foolish enough to pull a trailer with a Chevy Luv.

Oh, and try not to cause a 40 car multiple fatalities pileup on your 2 block run.
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Old 05-14-2019, 11:09 AM #20
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Also for reference: GX460. Same chassis. Same rear axle. Tow rating: 6,500lb. The primary difference is that the GX has a transmission cooling radiator and a bolt on hitch that is a class 3. The OEM 4Runner hitch is a class ?? - somewhere between a 2 and 3. It's only bolted to the frame cross member, which is strong - but not as robust as the bolt on hitch used by the GX460. Neither of these will be an issue in a short low speed tow to the lake.

The only issue here is whether you can actually get enough traction to pull up the ramp. That of course as has been mentioned will depend mostly on the angle of the ramp and the surface. Places like Florida often have algae on the concrete that can be pretty slippery. In the northern states we don't have that as often.

The biggest issue I have putting my own boat in the water is usually the ramp being too shallow of an angle. I have a sailboat that takes a bit more water to float off the trailer, so I end up having to put the rear bumper in the water before I can get the boat to float off the bunks. My solution is an extension for the hitch that's about 3' long. I just install at the ramp if necessary. At some point I'll modify the trailer tongue to be about 3 feet longer. This is where the rear overhang of most trucks being much longer is pretty useful. The point here is that you need to recognize that you're going to need to get a foot or two closer to the water with the rear tires than you would in most trucks. Check out the ramp and see if that's an issue or not.

After last year's drought here the ramp at one of my local lakes was probably 100 feet from the edge of the water. You can see how far I had to get into the water to launch my boat in this picture. I would not even consider doing that in a 2wd. So... like others have said, it's really the 2wd that's the problem, not the tow rating.

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Old 05-14-2019, 12:23 PM #21
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I had an F150 with one open axle and did fine with the weight of the boat and the drag of the water with a 28" pontoon boat. Go easy on the gas, don't give it enough power to spin a wheel. Creep up the ramp and make the torque converter generate heat, but it won't be for long enough to matter.

Others around me with smaller boats usually used plenty of power and sat there with a one wheel spinning. Not enough sense to go easy on the power.

Go out to the ramp one day and watch others to see what works and what does not.
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Old 05-14-2019, 03:12 PM #22
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The potential issue with respect to damage is the torque converter, followed by the transmission.
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Old 05-14-2019, 03:29 PM #23
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Quote:
Originally Posted by fastcat27 View Post
Hey guys! My Boat and trailer weigh 6,500lbs. you think i can tow it 2 blocks to the boat ramp and put it in? Do you think i have enough horsepower to get it back out? Thanks!
Horsepower/torque/braking shouldn't be an issue, as long as you keep the speeds low. Having enough traction to pull it up the ramp may be a different story. You're not just pulling a heavier object forward, you're pulling it at an upward angle. And unfortunately your drive wheels are located underneath the lightest area of your vehicle. If you could put a couple hundred pounds directly over the rear axle, it might help. I suspect you'll just spin your wheels.
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Old 05-14-2019, 04:28 PM #24
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Try it and if you can't pull the boat back up the ramp call a towing lol !

Or ask the dude with the biggest truck near you to help you

Easy mode if you can put it in the water, have faith in your rig, lets go places they say!
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Old 05-15-2019, 03:16 PM #25
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Quote:
Originally Posted by mike5 View Post
The potential issue with respect to damage is the torque converter, followed by the transmission.


Heat would be the only thing that could damage those components. He's only pulling 2 blocks so that wouldn't come into play hear. On a long tow then absolutely you are correct.


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Old 05-15-2019, 06:09 PM #26
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It should be clarified that the tow rating on a vehicle is not the max weight a vehicle can tow for 10 feet without breaking. Heck, recently on The Grand Tour they pulled a 13,000 ton ship 20 feet with a little Citroen without breaking it.

Instead the tow rating is an indicator of how much weight a vehicle can safely tow across country, through the mountains, at highway speeds, etc. without running away, being crashed from too much sway on the highway, etc. Any vehicle can tow WAY more than it's tow rating at slow speeds on flat ground.

In our litigious society these ratings have become WAY more conservative over the years. In Europe people tow boats and camping trailers all the time with little cars. My buddy in France tows a sizeable camping trailer with a Renault Clio (a TINY little car).

I once towed a 2500lb trailer with a 2000lb Honda CRX and the fact that I'm typing this proves I survived the experience - so did the Honda: last time I heard it was still running with 340,000 miles on the odometer.
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Old 05-15-2019, 07:22 PM #27
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I didn't see anything on this either nor have I had experience but now a days I can just see a sue job coming to if anything were to happen if you knowingly went over the rating.

Sad to say but everyone is looking to sue someone.
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Old 05-24-2019, 10:48 AM #28
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Definitely

But dont plan on stopping too quickly.
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Old 09-16-2019, 04:52 PM #29
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Update

I've been launching and pulling the 6500lb boat and trailer without any problem as well as towing the boat 7 miles to the gas station and back.
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Old 09-16-2019, 04:58 PM #30
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