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Brand: C.OEFT
OE numbers: A21-1500010
Product Name: Automatic Transmission Assembly
Compatible model:A21-1500010
Product status:Remanufactured
Product weight: 25.000KG
Packaging size:100X100X100 cm
Product packaging: Neutral Packaging
Car Series: Chinese
Car Type: for Chery
1. Turbo-Adapted Power Transmission
As the core drivetrain component for 1.6T/2.0T models, the assembly transfers power from the turbocharged engine to the drive wheels via a high-efficiency torque converter. The converter features an optimized impeller design that provides torque multiplication (2.8-3.5x) during low-speed acceleration, effectively compensating for turbo lag and ensuring strong 起步 performance. The reinforced gear sets adjust torque and speed dynamically to match the engine’s power output across all driving conditions.
2. Multi-Mode Automatic Gear Shifting
Working in synergy with the vehicle’s TCU, the assembly 实现 fully automatic gear changes with three selectable modes, adapting to diverse driving scenarios:
Eco Mode: Prioritizes fuel efficiency by upshifting at lower RPM (1,800-2,300 RPM) and reducing throttle sensitivity.
Normal Mode: Balances power and efficiency, shifting at 2,500-3,000 RPM for smooth daily driving.
Sport Mode: Delays upshifts to 3,500-4,500 RPM, enhances throttle response, and maintains higher boost pressure for aggressive acceleration.
The TCU also learns driver habits over time, adjusting shift logic to match individual driving styles.
3. High-Efficiency Torque Converter Operation
The integrated torque converter combines a variable-speed lockup clutch and a torque damper. For turbocharged applications, the lockup clutch activates earlier (50-55 km/h) and maintains lockup across a wider speed range, eliminating fluid slippage and improving power transfer efficiency by 10-12%. The torque damper absorbs vibration during lockup, reducing cabin noise and enhancing driving comfort.
4. Precision Hydraulic Control
The electronically controlled valve body serves as the assembly’s “brain,” directing transmission fluid through precision-machined passages to control clutch engagement and gear shifts. A digital pressure regulator maintains hydraulic pressure within 0.9-3.0 bar with ±0.05 bar accuracy, ensuring consistent performance even under varying turbo boost loads. An upgraded 8μm fine filter traps micro-metallic debris from turbo operation, protecting sensitive components from contamination.
5. Advanced TCU Communication & Diagnostics
The assembly establishes two-way communication with the vehicle’s TCU via the 16-pin connector, transmitting real-time data including transmission fluid temperature (±1°C accuracy), gear position, solenoid status, turbo boost pressure, and clutch wear. If a fault is detected (e.g., solenoid malfunction, low fluid pressure), the TCU stores a specific diagnostic trouble code (DTC) (e.g., P0756 for shift solenoid B performance) and triggers a multi-level warning (dashboard light + audio alert). Mechanics can use diagnostic tools to retrieve detailed fault data and perform targeted repairs.
6. Comprehensive Safety Protection
Park (P) Position: Features a hardened parking pawl (HRC 60) with a dual-locking mechanism, securely locking the output shaft to prevent vehicle rollaway even under high torque.
Reverse (R) Interlock: Requires the brake pedal to be depressed and vehicle speed ≤5 km/h before allowing reverse engagement, preventing accidental shifts.
Limp-Home Mode: If a critical fault is detected, the TCU limits the assembly to 2nd gear and reduces turbo boost pressure to 0.4 bar, allowing the driver to safely reach a repair facility.
Overheat Protection: Activates when fluid temperature exceeds 135°C, reducing engine power and triggering a warning to prevent thermal damage to the transmission and turbocharger.
1. Targeted OE-Grade Compatibility for Specific Vehicle Platforms
The Transmission Assembly Gearbox A21-1500010 is engineered with dedicated compatibility for mid-size passenger cars and crossover SUVs from specific domestic brands, primarily matching models such as Chery Tiggo 8 Pro (2022-2024) and Jetour Dashing equipped with 1.6T and 2.0T turbocharged engines. Adhering strictly to the original equipment (OE) design standards of these target platforms, it matches critical parameters including bell housing flange dimensions (customized for the brand’s 1.6T/2.0T engine interfaces), input/output shaft spline specifications (22-spline input, 27-spline output), and mounting point positions with a tight tolerance of ±0.08mm. This targeted compatibility eliminates the need for on-site modifications, ensuring seamless integration with the vehicle’s powertrain and avoiding issues like Transmission Control Unit (TCU) communication mismatches or powertrain vibration.
2. Robust Construction for Turbocharged Torque Demands
Gear System: Core gear sets are crafted from 20CrNiMo alloy steel, processed through deep vacuum carburizing (depth: 1.2-1.5mm), high-frequency quenching, and precision grinding. This treatment achieves a surface hardness of HRC 60-63 and core toughness of ≥95 J/cm², enabling the assembly to withstand continuous torque loads of up to 320 Nm—perfectly adapting to the power output of 1.6T/2.0T turbo engines.
Housing: Die-cast from ADC12 aluminum alloy with reinforced ribbing at key stress points (e.g., turbine connection and mounting interfaces), the housing resists thermal expansion and vibration (up to 40g) under high turbo operating temperatures, maintaining structural integrity in the range of -40°C to 140°C.
Sealing & Protection: Equipped with triple-lip Viton rubber seals and titanium-plated stainless steel gaskets, the assembly provides superior resistance to high-temperature transmission fluid leakage. The input shaft features a labyrinth-style dust cover with a hydrophobic coating, effectively blocking dust, water vapor, and debris in complex driving environments.
3. Optimized Shift Performance for Turbocharged Dynamics
Responsive Shift Control: Equipped with an electronically controlled valve body and high-frequency solenoids (response time ≤200ms), the A21-1500010 achieves quick and smooth gear transitions. It eliminates shift lag and shudder common in older transmissions, especially during turbo boost buildup.
Tailored Gear Ratios: The 6-speed automatic configuration features optimized ratios (1st: 3.250, 2nd: 1.950, 3rd: 1.300, 4th: 1.000, 5th: 0.820, 6th: 0.680) that complement the turbo engine’s power curve. Lower gears provide strong torque multiplication to compensate for turbo lag during acceleration, while higher overdrive gears reduce engine RPM by 20-25% at 120 km/h, improving fuel economy by 10-12% compared to worn or mismatched transmissions.
Adaptive Shift Logic: Preloaded with turbo-specific adaptive programs that monitor boost pressure and engine load, adjusting shift timing to maintain optimal power delivery. For example, during aggressive acceleration, it delays upshifts to keep the turbo in its efficient boost range.
4. Cost-Effective with Low Long-Term Maintenance
Offering OE-level performance at 30-35% lower than genuine brand-specific OEM assemblies, the A21-1500010 delivers exceptional value. Its modular design allows independent replacement of key components (solenoids, clutch packs, valve body) without disassembling the entire assembly, reducing maintenance labor time by 35%. It is fully compatible with the brand’s factory-specified ATF 4400 transmission fluid, eliminating the need for specialized fluid inventory. Additionally, the assembly’s durable construction reduces replacement frequency, cutting long-term maintenance costs for vehicle owners and repair shops.
5. Rigorous Turbo-Focused Quality Testing
Each A21-1500010 assembly undergoes a 12-stage quality verification process tailored for turbo applications: 3D dimensional scanning, Vickers hardness testing, hydraulic pressure leak testing (2x operating pressure), dynamic shift simulation (8,000+ cycles under 320 Nm torque), noise level measurement (≤72 dB at idle), high-temperature endurance testing (140°C for 6 hours), vibration resistance testing (40g), TCU compatibility testing (for 1.6T/2.0T engines), dynamometer road simulation (including turbo boost cycling), torque overload testing, seal integrity testing (high-pressure water and dust spray), and dual visual inspection (automated + manual). This rigorous testing ensures a failure rate of less than 0.4% within the first 60,000 kilometers.
6. User-Friendly Installation & Diagnostic Support
Installation: Features a brand-specific 16-pin electrical connector with plug-and-play compatibility, supporting automatic TCU protocol matching. Standardized mounting points require only professional basic tools, and a detailed vehicle-specific installation manual is included to simplify the process.
Diagnostics: Equipped with enhanced on-board diagnostic (OBD) capabilities that transmit real-time operating data to the vehicle’s TCU. Mechanics can use brand-compatible diagnostic tools (e.g., Chery X431 Pro) to quickly retrieve fault codes, monitor fluid status, and perform calibration—reducing troubleshooting time by 40%.
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