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Range Gearbox Subass – Complete HOWO Max 4X2 Range Gearbox Assembly Kit

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.

Quill Bearing (NA4824X1N / YA)

The Quill bearing supports the input shaft, providing low-friction rotation and accurate alignment within The part. Its robust design handles high radial loads.

Round Wire Snap Ring

This snap ring secures components axially, preventing movement and maintaining correct assembly of The part. Its spring steel construction ensures durability.

Sun Gear

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.

Cylindrical Roller 11X23IIIb GB4661

These needle rollers are used in planetary bearings, reducing friction and supporting high radial loads within The part for smooth planetary rotation.

Adjusting Gasket Unit

This shim set allows precise adjustment of bearing preload and gear mesh in The part, ensuring optimal performance and longevity of the planetary system.

Planetary Wheel

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.

Planetary Shaft

The Planetary shaft supports the planetary wheels and bearings, providing a robust pivot point for the planetary gear set in The part.

Roller Spacing Piece

This component maintains correct spacing between needle rollers, ensuring even load distribution and reducing wear in the planetary bearings of The part.

Planetary Gear Gasket

This thin metal shim provides a wear surface between the planetary gear and carrier, reducing friction and preventing galling in The part.

Planetary Carrier Assembly

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.

Elastic Cylindrical Pin

These spring pins secure shafts and gears, providing a positive interference fit that prevents loosening in The part during operation.

Torque Shaft

The Torque shaft transmits power between the range section and the main transmission, providing a rigid connection within The part.

Pushing Block Outer Spring

This spring provides outward force to synchronize the gear engagement, ensuring smooth shifts in The part.

Synchronous Pushing Block

This block translates the shifting force into axial movement of the synchronizer ring, enabling smooth gear meshing in The part.

Pushing Block Inner Spring

This inner spring provides additional synchronizing force, ensuring positive engagement of the range gear in The part.

Hexagon Bolt with Flange

This flange bolt secures covers and brackets, providing a vibration-proof fastening for The part.

Cover Plate Gasket

This gasket prevents oil leakage from The part cover, maintaining proper lubrication and cleanliness.

Large Washer

This washer distributes clamping load, protecting the housing surface and ensuring even torque in The part.

Hexagon Head Bolt

This standard hex bolt secures various covers and brackets within The part, providing reliable fastening.

O-ring 18000800 GB3452.1

This O-ring seals the joint between housing components, preventing oil leaks in The part.

Transmission Rear Housing (Aluminum Housing)

This lightweight aluminum housing encloses The part, providing rigid support and effective heat dissipation.

Internally Toothed Annulus

The internally toothed annulus meshes with the planetary wheels, providing a fixed reaction member for the planetary gear set in The part.

Low-Gear Tapered Hub Assembly

This hub engages the low gear range, providing a robust connection for the planetary carrier in The part.

Antifriction Bearing 61820 GB / T276

This deep-groove ball bearing supports the output shaft, providing low-friction rotation in The part.

Spacer Bushing

This bushing maintains correct axial positioning of gears and bearings within the range gearbox subass.

Filter Assembly

This filter removes contaminants from the transmission fluid, protecting the range gearbox subass from wear.

Combination Sealing Washer

This washer provides a leak-proof seal for bolt connections, preventing fluid loss in the range gearbox subass.

Oil Pipe Assembly

This pipe directs lubrication to critical components, ensuring proper oil flow in the range gearbox subass.

Hollow Bolt

This hollow bolt allows oil to pass through while securing components, enabling internal lubrication of the range gearbox subass.

Range Gear Synchronous Sliding Sleeve

This sleeve engages the range gear, providing smooth synchronization and positive engagement in the range gearbox subass.

High-Gear Tapered Hub Assembly

This hub engages the high gear range, providing a robust connection for the planetary carrier in the range gearbox subass.

Sun Gear Gasket (Rear)

This shim provides correct axial positioning of the sun gear, ensuring proper mesh in the range gearbox subass.

Antifriction Bearing 6218 / YA GB / T276

This ball bearing supports the input shaft, providing smooth rotation and high load capacity in the range gearbox subass.

Sensor Gear Ring

This ring provides a toothed target for speed sensors, enabling accurate shaft speed measurement in the range gearbox subass.

Combination Frame Oil Seal (Inner oil seal, Outer oil seal)

This dual-lip seal prevents oil leakage and ingress of contaminants, protecting the range gearbox subass bearings.

Rear End Cover Gasket of Output Shaft

This gasket seals the rear output shaft cover, preventing oil leaks from the range gearbox subass.

Bolt

This generic bolt is used for various fastening duties within the range gearbox subass, providing reliable clamping force.

Pressure Plate

This plate applies clamping force to the synchronizer assembly, ensuring positive gear engagement in the range gearbox subass.

Output Flange Φ180 End-face Tooth

This flange connects the output shaft to the driveline, transmitting power from the range gearbox subass.

Glued Bolt Q170B1040

This pre-applied thread-locking bolt prevents loosening, ensuring critical joints remain tight in the range gearbox subass.

Spring Washer

This split-ring washer provides locking action, preventing bolts from loosening due to vibration in the range gearbox subass.

Output Shaft End Cover (AMT)

This cover seals the rear of the output shaft, protecting the range gearbox subass from contaminants.

Flat Washer

This flat washer distributes clamping load, ensuring even pressure on housing surfaces in the range gearbox subass.

Glued Combination Bolt Q1461085

This combination bolt with pre-applied adhesive secures major housing joints, preventing oil leaks in the range gearbox subass.

Range Gear Cylinder Assembly (Conventional Ventilation Solenoid Valve)

This cylinder provides pneumatic actuation for range shifting, with a ventilation solenoid valve for precise control in the range gearbox subass.

Nut with Location Sensor Pin

This nut incorporates a sensor pin for position feedback, enabling accurate shift confirmation in the range gearbox subass.

Synchronous Gear Block for Range Gear

This block synchronizes the range gear engagement, ensuring smooth and quiet shifts in the range gearbox subass.

Range Gear Piston O-ring

This O-ring seals the piston, ensuring proper pneumatic actuation of the range gearbox subass without leakage.

Range Gear Synchronizer Ring

This ring provides friction surfaces for synchronizing the range gear engagement, ensuring smooth shifting in the range gearbox subass.

Range Stop Piston (Aluminum)

This lightweight aluminum piston limits the travel of the range shift mechanism, providing a positive stop in the range gearbox subass.

Range Gear Shaft Fork Shaft

This shaft supports the shift fork, translating axial motion to engage the range gear in the range gearbox subass.

Gear Ring Bracket

This bracket supports the sensor gear ring, ensuring accurate speed measurement in the range gearbox subass.

Range Gear Shaft Fork

This fork engages the sliding sleeve, transferring shift force to the synchronizer in the range gearbox subass.

Elastic Snap Ring for Shaft

This snap ring secures components on the shaft, preventing axial movement in the range gearbox subass.

Inner Hole Sealing Ring of Split Gear Rear Housing

This sealing ring prevents oil leaks between the housing halves, maintaining internal pressure in the range gearbox subass.

Shift Fork Support Pin

This pin provides a pivot point for the shift fork, ensuring precise movement in the range gearbox subass.

Waveform Elastic Washer

This wavy washer provides preload and absorbs shock, reducing noise and wear in the range gearbox subass.

Glued Combination Bolt Q1461040

This pre-coated bolt secures the rear housing, providing a vibration-proof fastening for the range gearbox subass.

range gearbox subass

Range gearbox subass – complete range gearbox assembly kit for HOWO Max 4X2

Product Parameters of Range Gearbox Subass

Material Encoding Name
WG9003324824Quill bearing (NA4824X1N / YA)
WG2229100114Round wire snap ring
WG2210100149Sun gear
WG9003321123cylindrical roller 11X23IIIb GB4661
AZ2208100003Adjusting gasket unit
WG2210100260Planetary wheel
WG2212100003Planetary shaft
WG2229100007Roller spacing piece
WG2229100115Planetary gear gasket
AZ2203100438Planetary carrier assembly
Q5280630Elastic cylindrical pin
WG2229101001Torque shaft
WG2229002002Pushing block outer spring
WG2229002001Synchronous pushing block
WG2229002003Pushing block inner spring
Q1841225Hexagon bolt with flange
WG2229100167Cover plate gasket
Q402B08Large washer
Q150B0820Hexagon head bolt
WG9003070800O-ring 18000800 GB3452.1
WG2229100043Transmission rear housing (Aluminum housing)
WG2210100148Internally toothed annulus
AZ220310000019Low-gear tapered hub assembly
WG9003321820Antifriction bearing 61820 GB / T276
WG2229100032Spacer bushing
AZ2203240209Filter assembly
WG9004130020Combination sealing washer
AZ220324000017Oil pipe assembly
AZ900396100023Hollow bolt
WG2210100186Range gear synchronous sliding sleeve
WG2210100184High-gear tapered hub assembly
WG2210100185Sun gear gasket (Rear)
WG90033336218Antifriction bearing 6218 / YA GB / T276
WG2210100174Sensor gear ring
WG9003071105Combination frame oil seal (Inner oil seal, Outer oil seal)
WG2229100184Rear end cover gasket of output shaft
WG2229100073Bolt
WG2229100072Pressure plate
WG2210100018Output flange Φ180 End-face tooth
WG9003801041Glued bolt Q170B1040
Q40310Spring washer
AZ2221000800Output shaft end cover (AMT)
Q401B10Flat washer
WG9003801085Glued combination bolt Q1461085
WG2209100006Range gear cylinder assembly (Conventional ventilation solenoid valve)
WG2209230010Nut with location sensor pin
WG2210100128Synchronous gear block for range gear
WG2210100147Range gear piston O-ring
WG2210100199Range gear synchronizer ring
WG2229100239Range stop piston (aluminum)
WG2214100054Range gear shaft fork shaft
WG2214100147Gear ring bracket
WG2214100001Range gear shaft fork
WG9003991130Elastic snap ring for shaft
WG2229230010Inner hole sealing ring of split gear rear housing
WG2229100043Shift fork support pin
WG9003990024Waveform elastic washer
WG9003801043Glued combination bolt Q1461040

Why Choose Our Range Gearbox Subass?

Complete Planetary and Synchronizer Kit

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.

OEM-Grade Precision and Durability

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.

Precision Fit and Easy Assembly

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.

Genuine HOWO Parts Reliability

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.

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