I don't understand vhy

[sbct]

I own a singe rear wheel Ram 2500 with a Cummins diesel. It weighs well over 8000 pounds empty. It also has 800 pounds of torque from the factory. You put those two things together with even just a tiny bit of traction and it will tow anything you could possibly chain to the back of it. You are talking about a $300,000+ tractor to get one that has that much power under the hood. Brand new RAM 3500 dually's have a towing capacity rating of over 30,000 pounds!

 

[CincyFlyer]

MacGregor makes a good point. Other things to consider as far as a truck out pulling a tractor, I believe it's because of the superior torque of the truck engine and rpm capability compared to the tractor engine. The other factor is weight distribution. Once the tractor initiates a load, not much weight is left on the front tires. Another factor is the weight of the vehicles themselves. If the truck weighs even a thousand pounds more or even the same weight, game over for the tractor. And finally as alluded to by others, tractor tires aren't the best traction devices on pavement.

It's only torque at the point of traction that matters; you can have as much torque as you like with the proper gearing.

 

[CincyFlyer]

I own a singe rear wheel Ram 2500 with a Cummins diesel. It weighs well over 8000 pounds empty. It also has 800 pounds of torque from the factory. You put those two things together with even just a tiny bit of traction and it will tow anything you could possibly chain to the back of it. You are talking about a $300,000+ tractor to get one that has that much power under the hood. Brand new RAM 3500 dually's have a towing capacity rating of over 30,000 pounds!

The 800 foot pounds of twist coming from that engine is swell, but it only matters how much torque the tires can produce against the ground. A slipping tire produces little. And gearing can give you an arbitrarily large amount of potential (only potential without traction!) at the rear wheels. Note that the creeper gear on some tractors with perhaps 75 foot pounds of torque at the crank can turn that into 1500 lbs or more.

 

[LD1]

. Note that the creeper gear on some tractors with perhaps 75 foot pounds of torque at the crank can turn that into 1500 lbs or more.

Far Far more.

I think of creeper gear as about 1 mph.

With a 48" tall tire, that's about 7 revolutions per minute at the tire.

Engine cranking 2500 rpm to make that 75 ft pounds...that's North of 26,000 ft-lbs at the tire.

There is a reason why a 50 hp/ 75 ft-lb tractor has larger axles than a 400hp /800ft-lb truck

 

[ovrszd]

I own a singe rear wheel Ram 2500 with a Cummins diesel. It weighs well over 8000 pounds empty. It also has 800 pounds of torque from the factory. You put those two things together with even just a tiny bit of traction and it will tow anything you could possibly chain to the back of it. You are talking about a $300,000+ tractor to get one that has that much power under the hood. Brand new RAM 3500 dually's have a towing capacity rating of over 30,000 pounds!

Comparing the pulling ability of your truck to a $300K tractor is unfair. Unfair for your truck. No comparison there at all.

Unless you are carrying a lot of tools, etc., I don't think your truck will weigh over 8K lbs. My Powerstroke Super Duty weighs 6850lbs full of fuel.

 

[Luke'sScreenName]

Comparing the pulling ability of your truck to a $300K tractor is unfair. Unfair for your truck. No comparison there at all.

Unless you are carrying a lot of tools, etc., I don't think your truck will weigh over 8K lbs. My Powerstroke Super Duty weighs 6850lbs full of fuel.

But it's a DODGE! WITH A CUMMINS! lol.

 

[ovrszd]

But it's a DODGE! WITH A CUMMINS! lol.

Yep. Great trucks. Just not Godlike.