

The range gearbox subass is a comprehensive range gearbox assembly kit engineered specifically for the HOWO Max 4X2 tractor, integrating over 50 precision components to deliver reliable range shifting and power distribution. This complete kit includes planetary gears, shafts, bearings, synchronizers, seals, and all necessary fasteners, ensuring a full rebuild of the range gearbox section. As genuine howo Parts, the range gearbox subass meets the highest OEM standards, providing the durability and shift quality that professional drivers demand. Every component in this range gearbox subass is precision-engineered to work in perfect harmony, delivering smooth, quiet, and reliable range changes for your HOWO Max 4X2.
This range gearbox subass includes the Quill bearing, sun gear, planetary wheels, planetary carrier, synchronizer rings, sliding sleeves, tapered hubs, output flange, cylinder assembly, and many more critical components. Each part is manufactured to exact tolerances, ensuring correct gear mesh, minimal backlash, and long service life. Whether you are performing a major overhaul or rebuilding the range section, this range gearbox subass provides all the necessary parts in one complete package, simplifying the rebuild process and guaranteeing compatibility.
With The part, you can restore the shift precision and reliability of your vehicle’s range gearbox, reducing downtime and ensuring smooth operation in all conditions. Trust in HOWO’s engineering and the quality of this range gearbox subass to keep your truck performing at its peak.
The Quill bearing supports the input shaft, providing low-friction rotation and accurate alignment within The part. Its robust design handles high radial loads.
This snap ring secures components axially, preventing movement and maintaining correct assembly of The part. Its spring steel construction ensures durability.
The Sun gear is the central gear in the planetary set, transferring torque to the planetary wheels. Its hardened teeth ensure quiet and efficient power flow in The part.
These needle rollers are used in planetary bearings, reducing friction and supporting high radial loads within The part for smooth planetary rotation.
This shim set allows precise adjustment of bearing preload and gear mesh in The part, ensuring optimal performance and longevity of the planetary system.
The Planetary wheels mesh with the sun gear and annulus, providing torque multiplication and speed reduction. Their helical teeth ensure quiet operation within The part.
The Planetary shaft supports the planetary wheels and bearings, providing a robust pivot point for the planetary gear set in The part.
This component maintains correct spacing between needle rollers, ensuring even load distribution and reducing wear in the planetary bearings of The part.
This thin metal shim provides a wear surface between the planetary gear and carrier, reducing friction and preventing galling in The part.
This assembly holds the planetary wheels and shafts, forming the core of the planetary gear set. Its robust construction ensures precise gear alignment in The part.
These spring pins secure shafts and gears, providing a positive interference fit that prevents loosening in The part during operation.
The Torque shaft transmits power between the range section and the main transmission, providing a rigid connection within The part.
This spring provides outward force to synchronize the gear engagement, ensuring smooth shifts in The part.
This block translates the shifting force into axial movement of the synchronizer ring, enabling smooth gear meshing in The part.
This inner spring provides additional synchronizing force, ensuring positive engagement of the range gear in The part.
This flange bolt secures covers and brackets, providing a vibration-proof fastening for The part.
This gasket prevents oil leakage from The part cover, maintaining proper lubrication and cleanliness.
This washer distributes clamping load, protecting the housing surface and ensuring even torque in The part.
This standard hex bolt secures various covers and brackets within The part, providing reliable fastening.
This O-ring seals the joint between housing components, preventing oil leaks in The part.
This lightweight aluminum housing encloses The part, providing rigid support and effective heat dissipation.
The internally toothed annulus meshes with the planetary wheels, providing a fixed reaction member for the planetary gear set in The part.
This hub engages the low gear range, providing a robust connection for the planetary carrier in The part.
This deep-groove ball bearing supports the output shaft, providing low-friction rotation in The part.
This bushing maintains correct axial positioning of gears and bearings within the range gearbox subass.
This filter removes contaminants from the transmission fluid, protecting the range gearbox subass from wear.
This washer provides a leak-proof seal for bolt connections, preventing fluid loss in the range gearbox subass.
This pipe directs lubrication to critical components, ensuring proper oil flow in the range gearbox subass.
This hollow bolt allows oil to pass through while securing components, enabling internal lubrication of the range gearbox subass.
This sleeve engages the range gear, providing smooth synchronization and positive engagement in the range gearbox subass.
This hub engages the high gear range, providing a robust connection for the planetary carrier in the range gearbox subass.
This shim provides correct axial positioning of the sun gear, ensuring proper mesh in the range gearbox subass.
This ball bearing supports the input shaft, providing smooth rotation and high load capacity in the range gearbox subass.
This ring provides a toothed target for speed sensors, enabling accurate shaft speed measurement in the range gearbox subass.
This dual-lip seal prevents oil leakage and ingress of contaminants, protecting the range gearbox subass bearings.
This gasket seals the rear output shaft cover, preventing oil leaks from the range gearbox subass.
This generic bolt is used for various fastening duties within the range gearbox subass, providing reliable clamping force.
This plate applies clamping force to the synchronizer assembly, ensuring positive gear engagement in the range gearbox subass.
This flange connects the output shaft to the driveline, transmitting power from the range gearbox subass.
This pre-applied thread-locking bolt prevents loosening, ensuring critical joints remain tight in the range gearbox subass.
This split-ring washer provides locking action, preventing bolts from loosening due to vibration in the range gearbox subass.
This cover seals the rear of the output shaft, protecting the range gearbox subass from contaminants.
This flat washer distributes clamping load, ensuring even pressure on housing surfaces in the range gearbox subass.
This combination bolt with pre-applied adhesive secures major housing joints, preventing oil leaks in the range gearbox subass.
This cylinder provides pneumatic actuation for range shifting, with a ventilation solenoid valve for precise control in the range gearbox subass.
This nut incorporates a sensor pin for position feedback, enabling accurate shift confirmation in the range gearbox subass.
This block synchronizes the range gear engagement, ensuring smooth and quiet shifts in the range gearbox subass.
This O-ring seals the piston, ensuring proper pneumatic actuation of the range gearbox subass without leakage.
This ring provides friction surfaces for synchronizing the range gear engagement, ensuring smooth shifting in the range gearbox subass.
This lightweight aluminum piston limits the travel of the range shift mechanism, providing a positive stop in the range gearbox subass.
This shaft supports the shift fork, translating axial motion to engage the range gear in the range gearbox subass.
This bracket supports the sensor gear ring, ensuring accurate speed measurement in the range gearbox subass.
This fork engages the sliding sleeve, transferring shift force to the synchronizer in the range gearbox subass.
This snap ring secures components on the shaft, preventing axial movement in the range gearbox subass.
This sealing ring prevents oil leaks between the housing halves, maintaining internal pressure in the range gearbox subass.
This pin provides a pivot point for the shift fork, ensuring precise movement in the range gearbox subass.
This wavy washer provides preload and absorbs shock, reducing noise and wear in the range gearbox subass.
This pre-coated bolt secures the rear housing, providing a vibration-proof fastening for the range gearbox subass.
Range gearbox subass – complete range gearbox assembly kit for HOWO Max 4X2
| Material Encoding | Name |
|---|---|
| WG9003324824 | Quill bearing (NA4824X1N / YA) |
| WG2229100114 | Round wire snap ring |
| WG2210100149 | Sun gear |
| WG9003321123 | cylindrical roller 11X23IIIb GB4661 |
| AZ2208100003 | Adjusting gasket unit |
| WG2210100260 | Planetary wheel |
| WG2212100003 | Planetary shaft |
| WG2229100007 | Roller spacing piece |
| WG2229100115 | Planetary gear gasket |
| AZ2203100438 | Planetary carrier assembly |
| Q5280630 | Elastic cylindrical pin |
| WG2229101001 | Torque shaft |
| WG2229002002 | Pushing block outer spring |
| WG2229002001 | Synchronous pushing block |
| WG2229002003 | Pushing block inner spring |
| Q1841225 | Hexagon bolt with flange |
| WG2229100167 | Cover plate gasket |
| Q402B08 | Large washer |
| Q150B0820 | Hexagon head bolt |
| WG9003070800 | O-ring 18000800 GB3452.1 |
| WG2229100043 | Transmission rear housing (Aluminum housing) |
| WG2210100148 | Internally toothed annulus |
| AZ220310000019 | Low-gear tapered hub assembly |
| WG9003321820 | Antifriction bearing 61820 GB / T276 |
| WG2229100032 | Spacer bushing |
| AZ2203240209 | Filter assembly |
| WG9004130020 | Combination sealing washer |
| AZ220324000017 | Oil pipe assembly |
| AZ900396100023 | Hollow bolt |
| WG2210100186 | Range gear synchronous sliding sleeve |
| WG2210100184 | High-gear tapered hub assembly |
| WG2210100185 | Sun gear gasket (Rear) |
| WG90033336218 | Antifriction bearing 6218 / YA GB / T276 |
| WG2210100174 | Sensor gear ring |
| WG9003071105 | Combination frame oil seal (Inner oil seal, Outer oil seal) |
| WG2229100184 | Rear end cover gasket of output shaft |
| WG2229100073 | Bolt |
| WG2229100072 | Pressure plate |
| WG2210100018 | Output flange Φ180 End-face tooth |
| WG9003801041 | Glued bolt Q170B1040 |
| Q40310 | Spring washer |
| AZ2221000800 | Output shaft end cover (AMT) |
| Q401B10 | Flat washer |
| WG9003801085 | Glued combination bolt Q1461085 |
| WG2209100006 | Range gear cylinder assembly (Conventional ventilation solenoid valve) |
| WG2209230010 | Nut with location sensor pin |
| WG2210100128 | Synchronous gear block for range gear |
| WG2210100147 | Range gear piston O-ring |
| WG2210100199 | Range gear synchronizer ring |
| WG2229100239 | Range stop piston (aluminum) |
| WG2214100054 | Range gear shaft fork shaft |
| WG2214100147 | Gear ring bracket |
| WG2214100001 | Range gear shaft fork |
| WG9003991130 | Elastic snap ring for shaft |
| WG2229230010 | Inner hole sealing ring of split gear rear housing |
| WG2229100043 | Shift fork support pin |
| WG9003990024 | Waveform elastic washer |
| WG9003801043 | Glued combination bolt Q1461040 |
The range gearbox subass includes every component from sun gear and planetary wheels to synchronizer rings and shift forks. This all-in-one kit ensures a full rebuild of the range section, eliminating the need for separate sourcing and guaranteeing compatibility.
All components of the range gearbox subass are manufactured to the exact OEM specifications, using premium materials and advanced heat treatment. This ensures exceptional wear resistance, quiet operation, and long-term reliability in the most demanding applications.
Every part in the range gearbox subass is precision-machined to tight tolerances, guaranteeing a perfect fit with the transmission housing and other internal components. The included gaskets, seals, and fasteners simplify assembly and ensure a leak-free, secure installation.
As genuine howo Parts, the range gearbox subass is designed and tested by the same engineers who built your AMT transmission. You receive the assurance of quality, compatibility, and performance that only OEM components can provide, backed by HOWO’s global service network.
The range gearbox subass is the heart of the range change mechanism in your HOWO Max 4X2 AMT transmission, and its reliability directly impacts the vehicle’s drivability and fuel efficiency. Over time, planetary gears, bearings, and synchronizers wear out, leading to difficult shifts, noise, and reduced performance. Rebuilding with this complete range gearbox subass kit restores the transmission to factory-new condition, ensuring smooth, quiet, and reliable range changes for hundreds of thousands of kilometers.
The range gearbox subass includes all the critical rotating and stationary components: the sun gear, planetary wheels and shafts, carrier assembly, low and high-gear hubs, synchronizer rings, sliding sleeves, and the complete cylinder and fork system. The inclusion of all gaskets, O-rings, seals, and fasteners ensures that every aspect of the range section is renewed, preventing oil leaks and maintaining proper lubrication.
Installation of the range gearbox subass should be performed by a qualified technician with experience in AMT transmissions. The precise alignment of the planetary gears and the correct adjustment of bearing preload are critical for reliable operation. This kit is designed to simplify the rebuild process, with all components clearly matched to the original equipment and the necessary hardware supplied.
Regular inspection of the range gearbox subass is recommended as part of your vehicle’s preventive maintenance. Listen for unusual grinding or rattling during range shifts, and check for oil leaks around the rear housing. If you detect any issues, replacing the worn parts with this genuine range gearbox subass kit will restore the reliability of your AMT transmission and prevent more extensive damage to the planetary gears and bearings.
For fleet operators, standardizing on the range gearbox subass simplifies parts inventory and ensures consistent range-shift performance across all vehicles. The robust construction of these genuine components minimizes the frequency of major repairs, lowering total cost of ownership and increasing vehicle uptime.
Owner-operators will appreciate the peace of mind that comes from using genuine HOWO parts. Knowing that your range gearbox subass is built to OEM standards allows you to focus on the road, confident that your transmission is protected.
The range gearbox subass is also compatible with the latest diagnostic tools, allowing for easy verification of range engagement and sensor feedback during routine checks. This compatibility simplifies troubleshooting and ensures that your AMT transmission remains in optimal condition.
In summary, the range gearbox subass is the definitive solution for rebuilding the range section of your HOWO Max 4X2’s AMT transmission. Its comprehensive design, OEM-quality construction, and ease of installation make it the smart choice for any professional driver or fleet manager.
Choose the range gearbox subass for your next transmission service and experience the difference that genuine howo Parts make. This investment in reliability will pay dividends in transmission longevity, shift quality, and reduced downtime.
Order the range gearbox subass today and ensure that your HOWO Max 4X2 continues to deliver the dependable range-shifting performance that you expect. With this complete kit, you can restore your range gearbox to factory-new condition and drive with confidence.
Don’t compromise on range-shift reliability – upgrade with the genuine range gearbox subass and keep your HOWO Max 4X2 operating at its best.
The range gearbox subass – engineered for HOWO Max 4X2, delivering precision range-gear components for reliable AMT transmission performance.