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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