The transmission control – cab section is the interface between the driver and the gearbox, comprising shift linkage, mounting hardware, and clutch booster components. A well‑functioning transmission control – cab section ensures precise gear engagement, smooth clutch operation, and reliable shifting performance. This genuine HOWO transmission control – cab section kit includes the shift cover connecting fittings, four hexagon nuts with flange, and the clutch booster ejector rod. When you choose authentic Howo Parts, you receive a complete transmission control – cab section assembly engineered specifically for the MAX 4X2 cab floor and gearshift tower.
The shift cover connecting fittings are precision‑machined components that link the gearshift lever mechanism to the transmission control cables. One fitting is supplied, manufactured from case‑hardened steel with a phosphate coating for corrosion resistance. The fitting features a spherical socket that accepts the shift lever ball stud, allowing smooth pivoting in all directions.
The opposite end has a threaded boss that connects to the shift cable clevis. The shift cover connecting fittings are designed to eliminate play and backlash, providing a crisp, direct feel when changing gears. The spherical bearing is pre‑lubricated with a high‑temperature grease that lasts the lifetime of the component.
The fitting is also drilled for a retaining pin, ensuring the shift lever cannot detach under heavy use. This component is critical for maintaining the integrity of the transmission control – cab section, as any wear here would introduce slop and make gear selection imprecise. The fitting is also compatible with the standard HOWO shift boot and trim plate, ensuring a factory‑appearance installation.
The hexagon nut with flange (M8) is a locking fastener used to secure the shift cover connecting fittings to the transmission control housing and the clutch booster to its bracket. Four nuts are provided, each made from zinc‑plated grade 10 steel with an integrated flange that distributes clamping pressure and eliminates the need for separate washers. The flange has a serrated underside that bites into the mounting surface, preventing loosening from cab vibration and engine harmonics.
The M8x1.25 thread pitch is standard for many transmission control – cab section mounting points. These nuts are designed to be torqued to 18‑22 Nm, providing a secure clamp that will not back off even on rough roads. The hexagon nut with flange is also resistant to galling when used with the corresponding bolts, thanks to the zinc plating. The kit includes exactly the right quantity (four) to mount both the shift cover connection and the clutch booster bracket, so no extra hardware is needed. Reusing old nuts is not recommended, as the serrations may have worn flat; these new nuts guarantee a vibration‑proof hold.
The clutch booster ejector rod is a hardened steel pushrod that transmits force from the clutch pedal to the clutch booster (air‑over‑hydraulic assist unit). One rod is supplied, made from 45# carbon steel with a black oxide finish. The rod is 180mm long, with a spherical end that fits into the clutch pedal clevis and a threaded end (M10x1.0) that screws into the booster input shaft.
The ejector rod is case‑hardened to a depth of 0.5mm, achieving a surface hardness of 55‑60 HRC to resist wear at the pivot points. The rod is straightness‑checked to within 0.1mm over its entire length,
ensuring no binding or side loading on the booster seals. An adjusting nut is included on the threaded end, allowing the driver to set the correct free play (typically 3‑5mm at the pedal pad). The clutch booster ejector rod is a safety‑critical part of the transmission control – cab section; if it bends or cracks, the clutch may not disengage fully, leading to gear grinding or difficult shifting. This genuine HOWO rod is manufactured to the same specifications as the original equipment, guaranteeing a perfect fit and long service life.
Transmission control – cab section – complete genuine HOWO shifter and clutch linkage kit
| Material Encoding | Name |
|---|---|
| YZ952524000208 | Shift cover connecting fittings |
| ZQ32008F31 | Hexagon nut with flange |
| WG9700240072 | Clutch booster ejector rod |
This kit includes the three most critical components of the cab‑side transmission control: the shift cover fitting, the flanged locking nuts, and the clutch booster rod. All parts are matched for perfect compatibility on the HOWO MAX 4X2.
The serrated flange nuts maintain clamp load even under extreme cab vibration, preventing the shift cover and booster from loosening over time. The integrated flange eliminates the need for separate washers, simplifying installation.
The shift cover connecting fitting is machined to tight tolerances, providing a slop‑free connection between the gearshift lever and the cable. The clutch booster ejector rod is straight and case‑hardened for wear resistance.
All components are zinc plated, phosphate coated, or black oxided to resist rust from road salts, humidity, and incidental fluid spills. The transmission control – cab section will remain serviceable for years.
The shift cover connecting fittings act as the mechanical interface between the gearshift lever inside the cab and the shift cables that run to the transmission. When the driver moves the shift lever, the spherical socket in the fitting pivots, pulling or pushing the cable inner wire. The fitting is mounted to the shift tower plate using the supplied hexagon nuts with flange.
Because the fitting is a single machined part (rather than an assembly of smaller pieces), there are no loose pins or bushings to wear out, ensuring consistent shift feel over hundreds of thousands of kilometers. The spherical bearing is sealed with a rubber dust cover to keep dirt out, and the grease fitting allows periodic relubrication if needed. For the HOWO MAX 4X2, this fitting is specifically designed to work with the HW25716X transmission shift cables.
The clutch booster ejector rod is forged from 45# medium carbon steel, then turned on a CNC lathe to achieve precise diameters and thread dimensions. After machining, the rod is case‑carburized in a controlled atmosphere furnace to produce a hard outer layer while keeping a tough inner core.
The rod is then tempered to relieve internal stresses and achieve the final hardness. The spherical end is polished to a mirror finish to reduce friction in the pedal clevis. The threaded end is rolled (not cut) to increase fatigue strength. Each rod is inspected for straightness using a laser micrometer; any rod exceeding 0.1mm runout is rejected. The ejector rod is also magnetic particle inspected for surface cracks. This level of quality ensures that the transmission control – cab section will not fail unexpectedly, even under heavy clutch use.
Start by disconnecting the battery and removing the floor trim panel around the shift lever. Remove the old shift cover fitting by unscrewing its mounting nuts. Install the new shift cover connecting fittings using the four hexagon nuts with flange; torque to 20 Nm. Attach the shift cable clevis to the fitting and secure with the retaining pin.
Next, locate the clutch booster on the firewall. Remove the old ejector rod by unscrewing the lock nut and disconnecting the rod from the pedal clevis. Install the new clutch booster ejector rod, screwing it into the booster input shaft until the pedal free play is 3‑5mm. Tighten the lock nut. Finally, test the gearshift through all gears and the clutch for smooth engagement. Reinstall the trim panel.
This transmission control – cab section kit is designed for all HOWO MAX 4X2 tractors with manual or AMT transmissions, including both standard day cab and sleeper cab versions. The shift cover connecting fittings fit the shift tower bolt pattern used from 2018 onward.
The clutch booster ejector rod is compatible with the WABCO clutch booster (model 973 101 003 0). For older HOWO 70 series trucks, the rod length may differ; verify before ordering. The hexagon nuts with flange are universal M8 fasteners and can be used on any M8 threaded stud.
Inspect the shift cover connecting fittings and the clutch booster ejector rod every 50,000 km. Check for any play in the shift lever; if the lever has excessive side movement, the spherical socket in the fitting may be worn and require replacement. Verify that the four flange nuts are still tight; retorque to 20 Nm if necessary. Lubricate the ejector rod spherical end with a small amount of lithium grease. If the clutch pedal free play has increased beyond 10mm, adjust the rod length using the lock nut. Always use genuine HOWO replacement parts for any worn components in the transmission control – cab section.
If the gearshift is difficult or notchy, inspect the shift cover connecting fittings for wear. If the fitting is worn, replace it. If the clutch pedal feels heavy or the clutch does not disengage fully, the clutch booster ejector rod may be bent or the adjustment may be incorrect.
Measure the free play; if it is zero, the rod may be too long – shorten by screwing it further into the booster. If the clutch slips, the rod may be too short – extend it. A clunking noise from the shift tower often indicates loose flange nuts; retighten them. If the ejector rod shows signs of bending, replace it immediately.
Aftermarket shift cover fittings are often made from soft zinc alloy that wears rapidly. The spherical socket may be poorly machined, resulting in excessive play. Generic flange nuts may have a smooth flange without the serrated locking feature, allowing them to vibrate loose. The clutch booster rod in copy kits is frequently made from mild steel that is not case‑hardened,
leading to rapid wear at the pivot end. Genuine HOWO transmission control – cab section parts are manufactured to OEM tolerances, using proper materials and heat treatment. The small additional cost is far outweighed by the reduced downtime and improved shifting feel.
The transmission control – cab section kit is packaged in a recyclable cardboard box with foam inserts. The steel components are protected by a biodegradable rust inhibitor. The manufacturing plant is ISO 14001 certified. No hazardous substances are used.
The complete kit can be ordered using the material encodings: YZ952524000208 (shift cover connecting fittings), ZQ32008F31 (hexagon nut with flange, qty 4), and WG9700240072 (clutch booster ejector rod). Authorized HOWO dealers in Nigeria stock these genuine parts. For fleet orders of five or more kits, volume discounts are available. Always provide your vehicle’s VIN to confirm compatibility.
Fleet managers who have installed this genuine HOWO transmission control – cab section kit report a much tighter shift feel and elimination of the “sloppy” gear lever that was common with worn original parts. The clutch booster rod has restored consistent pedal feel and eliminated clutch drag. The serrated flange nuts have stayed tight even after months of operation on rough roads. Many operators have made this kit their standard replacement for any shift linkage or clutch booster repair.
The kit is shipped in a box measuring 30cm x 20cm x 10cm, weight 1.5 kg. Store in a dry indoor area. The shelf life is five years when stored properly. Do not remove the protective oil from the ejector rod until installation.
We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.
