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All You Need to Know About Transmission Parts

A transmission part failure can cost you thousands of dollars in repairs, or even force you to replace the entire transmission if the issue is too severe. If you’re not familiar with all of the parts inside your transmission, it’s important that you educate yourself before your next big repair bill arrives so you can tell what’s causing the problem and have it fixed as soon as possible, saving you money and worry. Here are all of the main parts found in modern automatic transmissions, what they do, how they do their job, and why they’re important to your truck’s operation.


What Are Transmission Parts?

Transmissions are designed to convert the rotational power of an engine into a usable form. Engines work by burning fuel inside their cylinders, creating a tremendous amount of pressure. They then apply that pressure through the crankshaft, which converts linear motion from pistons in the cylinders into rotational motion – which is what makes trucks go. The transmission takes that rotational power and uses it to turn your truck’s wheels.

How do Manual Transmissions Work?

Manual transmissions are the most common type of transmission in trucks. Manual transmissions are composed of three main parts: the clutch, gearbox, and the flywheel. The driver uses the clutch pedal to disengage one gear from another. When driving a manual truck, you have to press down on the clutch pedal before shifting gears (which is why sometimes it’s hard for people with heavy feet). This makes it easier for people with automatic trucks because they don’t have to worry about depressing their foot while they’re driving.

How does Automatic Transmission Work?

Automatic transmissions work a lot like manual transmissions, except the clutch is operated by a gear selector rather than your foot. When you start the truck, the transmission will be in P or Park. From there, you can push the gear selector forward one or two notches to go into R or Reverse, respectively.

Different Types of Automatic Transmissions

The most common type of automatic transmission is a hydraulic system, which features an oil-filled tube that sends power from the engine to the gears. Hydraulic systems are considered durable but have a tendency to leak.

Another popular option for an automatic transmission is a torque converter. This system is generally less expensive than a hydraulic system and usually needs little maintenance, but can result in jerky starts and slow acceleration.

A third common type of automatic transmission is one that uses gears or chains.


Understanding Gears

Gears on transmission are responsible for the speed at which power is delivered from the engine to the wheels. The gears on a transmission work by increasing or decreasing the speed of the power as it is transferred. This means that if you want your truck to go faster, you need to put it in a gear with a higher number. If you’re going uphill and would like more torque, then you’ll want lower gears that provide more torque than higher gears.

Choosing the right transmission parts for your truck

Transmission parts are an integral part of every transmission. They dictate whether or not the transmission will work properly, and they also dictate how long it will last under rigorous use. In order to determine the best transmission parts for your truck, it’s important to know the three main classes of transmission parts and what each one does in the system. Here’s what you should know before buying any type of transmission part: What are Tractor Transmission Parts?

Identify The Problem

Some people might not know what a transmission is, but it is one of the most important parts of a truck. There are many different types of transmissions and there are also many different types of trucks. It can be difficult to choose which type of transmission will work with your truck because there are so many choices. The best thing to do is research what type of truck you have before shopping around for a new transmission.

Understand What Transmission Parts you need

The first thing you will want to figure out is what year, make, and model of truck you have. If you know that, then finding the right transmission parts should be a lot easier. There are many different options when it comes to transmissions these days so you may have to do some research depending on what type of vehicle you have. But don’t worry, with a little help from professionals like us, it will be easy as pie!


Choose The Best Brand Like Sinotruk howo

Sinotruk howo is a transmission manufacturing company, based in China. It supplies all kinds of gearboxes, differentials, hubs, and many other automotive parts. Sinotruk howo holds its own research center with sophisticated machines and production lines which are imported from other countries. You can find all kinds of auto spare parts with high quality, competitive prices, and good service there.

Your truck is a large investment so finding good quality replacement parts like Sinotruk howo will help keep it in good shape. When you need to find these types of replacement auto parts, turn to reliable retailers and wholesalers who stock genuine components. You can also get great deals when you buy in bulk which will save you money and give your back pocket a boost too.

Understanding Torque Converters

Torque converters are a type of fluid coupling that transfers rotational torque from an input shaft to an output shaft. Torque converters exist in various designs, but all share the same basic principle: they convert rotational speed differences into a proportional difference in linear speed between two coupled axles. The torque converter requires a significant amount of energy to function as its main function is to change one form of energy (rotational) into another form of energy (linear).


It’s important to know that there are a lot of different brands, styles and types of transmissions. They all have their pros and cons and it’s up to you to decide which one best fits your needs. Plus, with so many brands out there, how do you know which one is the best? There are a few things you can look for before making a final decision

Sinotruk Gearbox & Howo Transmission Parts

The HW series sinotruk gearbox is a new type of transmission developed by China Sinotruk. Sinotruk transmission parts sells well worldwide

What are the types of Sinotruk Howo Gearboxes?

Howo truck transmission is divided into truck manual transmission (consisting of gears and shafts) and truck automatic transmission, manual transmission assembly – the main structure of the gearbox clutch, manual transmission gears, input shaft, output shaft, transmission case, transmission temperature sensor

Sinotruk howo gearbox assembly is chosen for its high load-carrying capacity, stability, and reliability, and the following are two of our highest-selling Howo truck gearbox.


What are the hot howo transmission parts?

Transmission Cooler
Transmission Filter
Transmission Valve Body
Transmission Pan Gasket
Transmission Plate
Transmission Core
Transmission Mounts
transmission solenoid

Features & Advantages of Sinotruk Howo Transmission Parts

  • The main box double countershaft structure: The design of symmetrical arrangement makes the power transferred from the main shaft to the intermediate shaft be diverted. The input shaft and main shaft only bear the torque and do not bend and deform, which improves the stress on the main shaft and bearings and greatly improves the reliability and durability of the transmission.
  • Sub-box planetary mechanism: The planetary gear mechanism rear sub-box has the remarkable characteristics of compact structure, large load capacity, high transmission efficiency, large transmission speed ratio, reliable performance, etc. Under the premise of certain load capacity, the volume is minimized and light weight is achieved.
  • The sun gear and ring gear of the auxiliary box are floating to ensure even loading of the planetary mechanism. The application of the planetary mechanism of the auxiliary box and the rigid support of the output shaft’s large-span moment bearing ensure the support rigidity of the output shaft, which greatly increases the life of the auxiliary box gear and effectively solves the shortcomings of the low life of the auxiliary box of other products.
  • The mesh sleeve and the corresponding gear spline hole are designed with large chamfers. At the same time, due to the floating of the main shaft and main shaft gear, it can play a certain role in positioning and synchronization. The use of the mesh sleeve reduces the failure rate of the main box.
  • When the shift fork shaft of the auxiliary box range is not in place, the interlocking plate gets into trouble under the action of the shift fork shaft, so that the main box shift fork shaft is locked in the neutral position. Then push the lock plate, so that the main box can be shifted to the fork shaft, and then connected to each other to be blocked as needed.

Self-locking structure

  • The self-locking device of the operating mechanism traditionally uses a steel ball self-locking structure, which is easy to wear. The transmission adopts a sector-shaped self-locking block and a self-locking pin shaft for self-locking, and uses a sector-shaped self-locking block and a housing to limit the position.

Interlocking structure

  • Interlocking is achieved by using an interlocking fork. When in a certain gear neutral position, only the shift block of the gear is aligned with the groove of the interlock fork, and the shift block on the other shift fork shaft is just blocked by the inner wall of the interlock fork. , Is locked in the neutral position, so as to achieve interlocking, the interlocking effect is good.

Reverse lock

  • Structurally, to ensure that the reverse gear is engaged, it is necessary to overcome the greater spring force and the spring force of the high and low gear positioning ring to prevent accidental engagement of the reverse gear.

Double H valve

  • When the interlocking fork moves with the shift shaft to select the gear, it drives the spherical sliding column of the double H valve to realize the conversion of high and low gears.The adopted double H valve of the new structure effectively solves the defect of high leakage failure rate of the double H valve of other products.

Purchasing Guide

Suitable for all kinds of road transport vehicles, modified vehicles, truck cranes, railway rail cars, especially suitable for complex road conditions, long-term low-speed heavy-duty (in mountainous areas, mines) and other working conditions.

  1. Used in mining places: 9-speed transmission parts has a large input torque, for drive axles, mining drive axles need double reduction, differential lock, and differential.
  2. Urban construction: These trucks usually with driving distances of less than 200kms driving on urban roads. Choose a 6×4 or 8X4 drive depending on the load capacity. The transmission parts choice of 10 or 12 speed is better. Double reduction axle with speed ratio from 4.42 to 5.73.
  3. Transport distance over 200km: the transmission parts can choose 10 or 12 speeds. The dynamic axle can choose a speed ratio of 4.42 or 4.8, and it is better to use 8X4 to be able to load more goods.

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