Torque/torsion/tension Bar/rod

Topic 26872 | Page 1

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User R.'s Comment
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What's the difference between the torque, tension, torsion + bar, rod. I've seen one on the right and one on the left suspension of the trailer and bar vs rod seems was the difference in one case where the rod is adjustable on the driver's side and tension was on the right side in the other case if I remember correctly.

Errol V.'s Comment
member avatar

Start with torsion. The word means "twisting"

A torsion bar does the work of a suspension spring. It's like you take a coil spring and unwind it. So a torsion bar is part of a truck or trailer's suspension. Hint: something sits ON a "torsiON" bar spring.

A torque bar controls engine torque. A truck engine produces twisting energy (called torque) that goes out to the drive shaft, then to the drive wheels. Torque bars keep the transmission/ drive shaft/ differential from twisting out of the truck frame.

In the real world, a certified CDL examiner told me he doesn't mind if you use one word of the other.

CDL:

Commercial Driver's License (CDL)

A CDL is required to drive any of the following vehicles:

  • Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds.
  • Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds.
  • Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver.
  • Any vehicle required by federal regulations to be placarded while transporting hazardous materials.
User R.'s Comment
member avatar

What's the difference between the torque, tension, torsion + bar, rod. I've seen one on the right and one on the left suspension of the trailer and bar vs rod seems was the difference in one case where the rod is adjustable on the driver's side and tension was on the right side in the other case if I remember correctly.

I actually meant to say arm as the second modifier. Arm instead of bar or rad meant adjustable driver's side in one youtube video.

User R.'s Comment
member avatar

A consensus of videos now appears torque bar is on the passenger trailer side and torsion bar is on the driver side.

Old School's Comment
member avatar

User R, I'm curious how this information is helpful to you. It seems you're lost in the weeds.

I've been a very successful driver. And I never even came close to focusing on the kinds of things you are bringing up in various threads/conversations. I'm not trying to be critical. I understand coming across information and wanting to make sure you're clear on it when it seems confusing. But... you are really distracting yourself from the things that are critical for your successful start at this.

Honestly, I recommend you stay away from You Tube, and Google searches at this point in your quest. I wouldn't even bother with your states CDL manual. Put all your effort into the High Road CDL Training Program. That thing will get you where you need to be. It's hands down the most effective training tool for taking your permit tests. The entire CDL manual is built into it plus it has a lot of extra stuff to help you while out on the road. The only state I know of that requires a little additional information is Texas, but you know how those Texans are. They think everything in their state has got to be bigger!

As far as learning the things you need for the pre-trip inspection , you will be taught those things in school or in a Paid CDL Training Program.

Pre-trip Inspection:

A pre-trip inspection is a thorough inspection of the truck completed before driving for the first time each day.

Federal and state laws require that drivers inspect their vehicles. Federal and state inspectors also may inspect your vehicles. If they judge a vehicle to be unsafe, they will put it “out of service” until it is repaired.

CDL:

Commercial Driver's License (CDL)

A CDL is required to drive any of the following vehicles:

  • Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds.
  • Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds.
  • Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver.
  • Any vehicle required by federal regulations to be placarded while transporting hazardous materials.

HOS:

Hours Of Service

HOS refers to the logbook hours of service regulations.
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