Why Your All-Wheel Drive Transfer Cases Need High-Precision Crown Wheel and Pinion Gears?
Eradicate Tooth Breakage
Under extreme off-roading or full-load climbing, the differential must withstand massive instantaneous impact torque. We utilize 18CrNiMo7-6/8620 high-purity alloy steel combined with multi-stage closed-die forging. This ensures continuous grain flow, increasing impact toughness by 40% and maintaining integrity even under sudden high-intensity stress.
Eliminate Noise & Vibration
AWD systems involve both front and rear differentials. If the tooth profile precision is insufficient, the slight speed mismatch between axles creates internal stress.We employ Gleason CNC lapping machines. By conducting full-mesh contact testing that simulates real-world driving conditions. This ensures silky-smooth and silent power transmission at any speed.
Advanced Heat Treatment
Full-time AWD means gears are constantly engaged.Long-duration high-speed rotation generates immense frictional heat.We use fully automated controlled-atmosphere carburizing furnaces. By precisely controlling carbon, we ensure a high surface hardness to resist wear while maintaining core toughness.This process ensures exceptional durability under continuous high-temperature operation.
Ensuring Every Gear Set Runs "Invisible"
In precision AWD systems, even a minute geometric error can be amplified by the differential housing into annoying cabin noise.Every gear set is mounted on professional Gleason meshing testers, simulating the full spectrum of driving conditions—from low-speed high torque to high-speed cruising.We inspect noise levels on both the Drive and Coast sides.
| Series | Gear Ratios | Material | Hardness | Processing | QC Standard |
| Jeep / Dana | 3.73, 4.10, 4.56, 4.88, 5.13 | 20CrMnTiH5/8620 | Surface: HRC 58-62 Core: HRC 30-45 | CNC Forging + Gleason Lapping | 100% Meshing Test |
| Toyota / Lexus | 3.58, 3.90, 4.11, 4.30, 4.56 | 20CrMnTiH5/8620 | Case Depth: 0.8 – 1.6 mm | Oerlikon Face Milling | Noise Level ≤ 75 dB |
| Ford / Dana | 3.31, 3.55, 3.73, 4.10, 4.56 | 20CrMnTiH5/8620 | Controlled Atmosphere Carburizing | Shot Peening | AGMA 10-12 Precision Grade |
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