High-precision Great Wall Motor Gears For Automotive Transmission Gears

Great Wall Motor (GWM) gears are high-precision automotive transmission gears independently developed by GWM Hive Transmission, specially designed for 7DCT/9DCT/9AT/DHT transmissions and drive axles, covering full categories including transmission gears, final drive gears, differential gears and spiral bevel gears. Adopting aerospace-grade materials and precise heat treatment, they fit fuel, hybrid and pure electric platforms, core supporting all GWM brands (Haval, WEY, ORA, Tank, etc.), serving as key components for efficient transmission, low noise, smoothness and high load capacity in GWM powertrains.

Product Features

• Full series covering DCT/AT/hybrid transmissions, fitting transverse/longitudinal platforms.
• Fine-height teeth, spiral teeth and drum modification, smooth transmission with excellent NVH.
• Aerospace-grade carburizing & quenching, hard surface (HRC58-62) with tough core, strong impact resistance.
• High precision (ISO Grade 4-7), 0.9μm CMM inspection, no shift shock.
• Lightweight alloy, 15%-25% lighter than traditional gears, high efficiency & energy saving.
• High/low temperature resistance (-40℃~150℃), adapting to extreme conditions & long-term heavy load.
• Modular & standardized design, multi-platform compatible, failure rate <1%.

Technical Parameter Table

Working Principle

• Transmission Gears: Gear pairs with different teeth, multi-stage ratios via clutch switching, speed reduction & torque increase.
• Spiral Bevel Gears (Final Drive/Differential): 90° staggered shaft drive, convert horizontal to vertical power, distribute left/right wheel speed.
• Modification & Meshing Optimization: Drum modification & fine-height teeth boost contact ratio, uniform load distribution, lower noise & impact.
• Power Path: Engine → Input Shaft → Transmission Gears → Final Drive → Differential → Wheels, efficient power output.

Main Applications

• Core transmission parts for GWM 7DCT/9DCT & 9AT transmissions.
• Spiral bevel gear sets for Tank/Haval/WEY final drives & differentials.
• Reduction gears for DHT hybrid & pure electric drive axles.
• Supporting for pickups, off-road, SUV & passenger car transmissions.
• High-precision gears for NEV e-axles & distributed drive systems.
• Right-hand drive models & global supply chain transmission gears.

Product Advantages

• High Efficiency: Max 98% efficiency, 95.6% comprehensive, fuel consumption down 5%-8%.
• Ultra-Low Noise: Fine-height teeth + modification, NVH reduced 3-5dB, quiet ride.
• Super Durability: Aerospace-grade process, 250,000km overhaul-free, failure rate 1/3 below industry.
• Extreme Adaptation: Stable at -40℃, 150℃, plateau & off-road conditions.
• Lightweight: 15%-25% weight reduction, better response & lower energy consumption.

Production Process

• Raw Material Inspection (Ultrasonic Testing) → 2. Precision/Hot Forging Blanks
• Pre-Heat Treatment (Normalizing) → 4. CNC Turning
• CNC Gear Hobbing/Milling (Gleason/Klingelnberg) → 6. Lead Modification
• Acetylene Carburizing + Inert Gas Quenching (Aerospace-grade)
• Low-Temp Tempering → 9. End/Bore Precision Grinding
• CNC Gear Grinding (Grade 4 Precision) → 11. Deburring/Cleaning/Flaw Detection
• CMM Measurement (Zeiss 0.9μm) → 13. Meshing Testing
• Anti-Rust Treatment → 15. Clean Assembly → 16. Packaging & Warehousing

Installation & Operation

• Clean housing, gears & bearings before installation, remove impurities & burrs.
• Strictly control center distance, parallelism & perpendicularity, tolerance ≤0.005mm.
• Adjust backlash (0.15-0.3mm) & contact pattern (60%-80%).
• Fill GWM special GL-5/MTF gear oil, ensure correct level.
• No-load running-in 30min, check noise, temperature rise & leakage.
• Gradual load test, confirm smooth shifting, no impact & abnormal sound.
• Regular (5,000-10,000km) check oil quality, level & gear wear.