Transmission Gearbox

1. Transmission Gearbox quality is divided into refurbished, remanufactured, and brand new.

2. 12-month quality guarantee service from the date of customer receipt.

3. Small-batch orders are acceptable (retail orders excluded).

4. Wooden crate packaging, laser compatible

1.Commercial Vehicles & Light Trucks

In fields requiring high reliability, low-cost maintenance, and control under specific working conditions, manual transmissions remain widespread.

Logic:

• Cost Control: Manual transmissions have a simple structure, low manufacturing costs, and cheap repairs, making them suitable for price-sensitive operational fleets.

• Durability & Controllability: In heavy-load starts, low-speed climbing, or rough terrain, drivers can better control torque output by manually selecting gears, avoiding frequent shifting or overheating common in automatics.

• Regional Habits: In developing countries and parts of Europe, the proportion of manual transmissions in light commercial vehicles (vans) and pickup trucks remains high.

Typical Models:

• Ford Ranger / Toyota Hilux: Base models or "work truck" versions in markets like Southeast Asia, Australia, and South America often still offer manuals.

• Light Vans/Trucks: Base versions of models like the Ford Transit or Mercedes-Benz Sprinter.

2. Hardcore Off-Road Vehicles

• Precision Control: In extreme off-road environments (e.g., rock crawling, recovery), drivers need precise control over wheel speed and torque. Manuals allow for more direct intervention, preventing the transmission logic from misjudging the situation.

1.1 Performance Parameters

Max Input Torque:

• Range: Typically from 150 Nm (compact cars) to 600+ Nm (high-performance/light commercial vehicles).

• Safety Factor: Designed to withstand instantaneous shock loads of 1.5x – 2.0x rated torque without permanent deformation.

Gear Count:

• Mainstream Passenger Cars: 5-speed or 6-speed.

• High-Performance/Commercial: 7-speed or more (less common, typically for specific heavy-duty or supercar applications).

• Reverse Gear: 1 (typically non-synchronized spur gear or helical gear).

Ratio Spread:

• 1st Gear Ratio: 3.5 – 4.5 (provides starting torque).

• Top Gear Ratio: 0.70 – 0.85 (Overdrive, for fuel-efficient highway cruising).

• Total Ratio Spread: 4.5 – 6.0.

Shift Effort:

• Static Shift Force: < 40 – 60 N (depending on gear and temperature).

• Dynamic Shift Force: Must be smooth under rated RPM with no binding.

Efficiency:

• Mechanical Efficiency: 96% – 98% (higher than automatic transmissions due to the absence of torque converter slip and high-pressure oil pump losses).

NVH Characteristics:

• Gear Whine Noise: < 75 dB(A) @ rated speed/load.

• Shift Shock Noise: Must meet overall vehicle NVH targets.

1.2 Structure & Materials

Housing:

• Material: Primarily Die-cast Aluminum Alloy (e.g., A380, ADC12); some heavy-duty models use Cast Iron.

• Features: High rigidity to resist separation forces generated by gear meshing; optimized fin design for heat dissipation.

Gear Set:

• Material: Carburized alloy steel (e.g., 20MnCr5, 18CrNiMo7-6).

• Process: Hardened tooth surface grinding or honing; precision grade ISO 6-7.

• Type: Constant Mesh Helical Gears.

Synchronizers:

• Type: Single-cone, Double-cone, or Triple-cone (used for 1st/2nd gears or high-performance applications).

• Friction Material: Brass/Bronze, Sintered Metal, or Carbon-fiber composites (for high performance).

• Lock-up Angle: Precisely designed to prevent forced engagement before synchronization.

Bearings:

• Types: Deep groove ball bearings, Tapered roller bearings, Needle roller bearings.

• Life: Design life typically matches vehicle life (>300,000 km or 5,000 hours).

Shift Mechanism:

• Type: Cable-operated or Rod-operated.

• Selection/Engagement Precision: Must include an interlock system to prevent accidental engagement.

1.3 Lubrication & Sealing

Oil Capacity: 1.5 – 3.0 Liters (model dependent).

Oil Specifications:

• API GL-4 (Most common, protects synchronizers).

• API GL-5 (Only for specific designs; caution required regarding sulfur content corrosive to synchronizers).

• Viscosity: Typically 75W-80 or 75W-90 (Fully Synthetic).

Sealing:

• Input/Output Shaft Seals: Fluoroelastomer (FKM/Viton) to withstand high temperatures and oil corrosion.

• Breather Valve: Prevents internal pressure buildup leading to leaks while keeping out water and dust.

In the highly competitive automotive after-sales market, the core competitiveness of our shift lever lies in the combination of professionalization and flexibility: we focus on the segmented track of Japanese and Korean vehicle models, and achieve higher product matching accuracy through in-depth research on the characteristics of the brand's transmission system; at the same time, we break the limitation of large minimum order quantity of traditional auto parts manufacturers, support small-batch orders, and provide customizable packaging and perfect warranty service.

Whether you are a repair shop pursuing installation efficiency, a distributor focusing on market demand, or a modification workshop paying attention to product quality, our shift lever can meet your personalized needs with OEM-level quality, flexible procurement terms and targeted after-sales support. We are committed to becoming the most reliable supplier of shift levers for Japanese and Korean vehicle models in the automotive aftermarket!