Tractor Torque
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Tractor Torque
 International Tractor NOS Torque Amplifier Carrier Bearing Super MTA 300 to 2656 US $59.99 
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 Farmall Tractor Emblem Torque Amplifier 350 400 450 US $24.99
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 JOHN DEERE IH OLIVER TRACTOR GOODYEAR DYNA TORQUE II 155 X 38 NICE USED TIRE US $375.00
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 VINTAGE ALLIS CHALMERS B TRACTOR TORQUE TUBE ELEC START US $49.99
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 Allis Chalmers B Tractor Torque Tube Clutch Housing US $70.00
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 JOHN DEERE IH ALLIS CHALMERS TRACTOR GOODYEAR 83 X 24 DYNA TORQUE II TIRE US $275.00
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 Allis Chalmers B or C Tractor Torque Tube Clutch Housing US $90.00
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 217 1020 Charlynn Tractor Steering Shaft Torque Generator WC WD WD45 WD45D 7 8 US $634.15
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 Farmall Cub tractor good IH torque tube bottom cover US $28.85
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 184 R 46 R1 GOODYEAR DYNA TORQUE RADIAL TIRES CASE IH JOHN DEERE TRACTOR 60 70 US $1,300.00
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 DVD Tractor Torque The Latest In Tractor Technology US $29.95
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 TRACTOR PART NO 1251698C92 IH REMAN TORQUE AMPLIFIER US $762.43
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 IH Super M TA W6 TA Tractor Service Manual Torque Ampl US $15.99
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 TRACTOR PART NO 79018 Gasket kit torque amplifier Tractors 1566 1568 1586 US $82.68
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 Allis Chalmers B Tractor Torque Tube US $125.00
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 TRACTOR PART NO 3701015M92KT CLUTCH ASSEMBLY SPLIT TORQUE US $438.02
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 INTERNATIONAL SERVICE MANUAL 3514 3616 TRACTOR TRANSMISSION AND TORQUE CONV US $31.50
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 Caterpillar D9 Tractor Torque Converter Parts Manual US $9.99
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 Caterpillar D8 Tractor Torque Converter Parts book US $9.99
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 Good Year 124x38 Dyna torque rear tractor tires 98 tread John Deere B rims US $1,195.00
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 Farmall 460 560 tractor Original Torque Amplifier TA US $255.00
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 Farmall 450 400 tractor TA torque amplifier assembly US $165.85
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 International TD24 Torque Converter Crawler Tractor Service Training Manual US $20.00
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 CATERPILLAR D8 TRACTOR WITH TORQUE CONVERTER PARTS CATA US $16.99
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 Caterpillar D9 Tractor Torque Converter Drive Part Book US $13.30
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 120003C2 New Case IH Tractor Torque Amplifier Cable 1086 1486 1586 3388 3588 US $43.99
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 Caterpillar D8 Tractor Torque Converter Parts Book US $16.62
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 INTERNATIONAL IH SERVICE MANUAL FARMALL 300 TORQUE AMPLIFIER TRACTOR US $40.50
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 Case 430 530 Tractor parts Torque Tube Cover US $25.00
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 Farmall IH 340 Tractor Torque Amplifier Clutch Cover US $20.00
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 Farmall IH 340 Tractor Torque Amplifier US $150.00
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 Allis Chalmers Torque Converter Manual HD 6EP Tractor t US $19.99
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 HD TA Farmall IH 706 806 856 Tractor Torque Amplifier US $760.00
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 Case IH A192183 torque Limiter disc TRACTOR CLUTCH US $240.00
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 Caterpillar D8 Tractor Torque Converter Drive Parts Book 1963 US $16.62
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 Farmall Cub tractor good IH torque tube houseing US $110.85
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 Farmall IH SMTA 400 450 560 Tractor Torque Amplifier TA US $565.00
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 786 886 985 1086 1486 INTERNATIONAL TRACTOR TORQUE ASSEMBLY US $495.00
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 HD Tractor Pulling Torque Amplifier FARMALL INTERNATIONAL IH $1750 EXCHANGE US $1,750.00
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 Allis Chalmers Tractor Torque Tube Plate Cover Assy US $16.00
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 1964 Farmall 706 gas tractor torque lever bracket US $9.99
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 IH 1955 Tractor Torque Amplifier 300 Blue Ribbon Manual US $34.99
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What makes a truck a truck vs. a Car?
What aspect of the truck engine is it that makes a truck capable of pulling large amounts of weight vs cars? Is it all torque? If so, why? I understand that torque is a circular force but I don't understand how that translates into more pulling/pushing power in a tractor. I know it's not horsepower or else we'd see Dodge Vipers and Bugatti Veyrons pulling trailers around.
Torque is very important when it comes to hauling. I like to think of it as leverage.
For instance, if you are removing a bolt with a wrench that is 12 inches long, you have to use a set amount of energy (say 24 units of energy) to move the wrench. Now, if you were to put a pipe over the wrench that is 24 inches long, the amount of energy you need to exert to turn the wrench is more or less decreased by 50% (12 units of energy). The pipe gives you leverage or more power to move and you work less to do the same amount of work. An engine with 300hp but only 200 lb-ft of torque will have a much harder time pulling a large object than an engine with 275hp by 425 lb-ft of torque. The engine on the higher torque engine won't have to work as hard. Torque is the power of movement.
Here's a nice article that really explains Torque vs HP.
http://www.hotrod.com/techarticles/hrdp_0401_torque_horsepower_guide/index.html
However, as far as car vs truck, it's also all about the vehicle frame itself. For instance, a truck is a body on frame design while most cars are unibody designs. The reason you don't see Dodge Vipers or Chevrolet Corvettes towing boats or trailers much (I've seen Camaro's towing stuff, but not super big.lol) is because the frames of the cars simply can't handle that much of a load. The engines themselves are perfectly fine for towing (Corvette engines have plenty of torque and horsepower) if you dropped a base Corvette engine in say a Chevy Tahoe, you could easily tow a good size boat. And even if you were able to tow a boat or trailer with a Dodge Viper, the stability you get with the body/frame design of a Silverado or F-150 would be gone. And like another answer mentioned even in the world of body on frame, there are different designs that lead to better towing ability. For instance a Toyota Tundra (current generation) can pull a trailer/boat faster than most other pickups (largest engine, more torque/horsepower), but only up to a certain point, once it hits that point it can't (safely at least) pull larger payloads, while the other pickups can continue to pull larger payloads because of the way their frames are designed.