SEARCH FOR YOUR PRODUCT
Brand: C.OEFT
OE numbers: 121000098AA
Product Name: Automatic Transmission Assembly
Compatible model:121000098AA
Product status:Remanufactured
Product weight: 25.000KG
Packaging size:100X100X100 cm
Product packaging: Neutral Packaging
Car Series: Chinese
Car Type: for Chery Tiggo 8 (T18) and Chery Tiggo 8
1. Extreme Torque Power Transmission & Dynamic Adjustment
As the core drivetrain component for luxury and performance vehicles, the assembly transfers power from 1.5T-2.0T high-output turbo and 2.0L-3.0L NA engines to drive wheels via a flagship-grade torque converter. The converter features a dual-impeller design, providing torque multiplication (3.0-3.8x) during low-speed acceleration—completely eliminating turbo lag in 2.0T high-performance models and ensuring explosive 起步 power. The ultra-strong gear sets adjust torque and speed dynamically, adapting to urban luxury commuting, highway cruising, and track-style driving.
2. Multi-Mode Intelligent Adaptive Shifting
Working in synergy with the vehicle’s luxury TCU, the assembly 实现 flagship-level intelligent shifting by monitoring engine RPM, throttle position, vehicle speed, turbo boost pressure, steering angle, and driver behavior. It supports five shift modes:
Eco Mode: Upshifts at 1,800-2,200 RPM for maximum efficiency.
Normal Mode: Balances power and comfort, shifting at 2,200-2,800 RPM.
Sport Mode: Delays upshifts to 3,500-4,500 RPM for responsive acceleration.
Sport+ Mode: Holds gears at 5,000-6,500 RPM (redline) for track performance.
Comfort Mode: Softens shift pressure and delays throttle response for quiet, smooth rides.
It also learns driver habits within 50km, automatically adjusting shift logic for personalized driving.
3. Flagship-Grade Torque Converter Operation
The upgraded torque converter integrates a variable-speed lockup clutch and a torque damper. For high-performance models, the lockup clutch activates earlier (45-50 km/h) and maintains lockup across wider speed ranges, improving power transfer efficiency by 12-15%—4-5% higher than the 121000051AA. For luxury models, the torque damper absorbs vibration, reducing cabin noise by 3-4 dB during lockup.
4. Precision Hydraulic System Regulation
The full-electronic valve body serves as a flagship control center, directing transmission fluid via diamond-machined passages to handle extreme torque demands. A digital pressure regulator maintains hydraulic pressure within 1.0-3.2 bar with ±0.02 bar accuracy, ensuring consistent clutch engagement even under 380 Nm torque. An upgraded 5μm ultra-fine filter traps micro-metallic debris from high-performance engines, while a high-pressure relief valve (max 4.0 bar) prevents overpressure damage during extreme acceleration.
5. Luxury-Grade TCU Communication & Advanced Diagnostics
Connecting to the TCU via a 20-pin connector, the assembly transmits comprehensive real-time data: fluid temperature (±0.5°C accuracy), pressure, gear position, solenoid status, turbo boost pressure, clutch wear, and fluid quality. If faults are detected (e.g., solenoid failure, clutch slippage), the TCU stores luxury-specific DTCs (e.g., P0768 for shift solenoid D electrical malfunction) and triggers a multi-level warning (dashboard light + audio + central control message). Mechanics can use luxury diagnostic tools (VAS 6154, BMW ICOM) to retrieve detailed fault data and historical driving parameters for targeted troubleshooting.
6. Comprehensive Luxury Safety Protection
Park (P) Position: Upgraded parking pawl with diamond-like carbon (DLC) coated teeth (HRC 65) and a triple-locking mechanism, ensuring secure locking even under 380 Nm torque—eliminating rollaway risks for high-performance models.
Reverse (R) Interlock: Requires brake pedal depression, electronic key verification, turbo boost pressure ≤0.1 bar, and vehicle speed ≤5 km/h to prevent accidental reverse engagement.
Intelligent Limp-Home Mode: If a critical fault is detected, the TCU limits the assembly to 2nd gear, reduces turbo boost pressure to 0.3 bar, activates maximum cooling, and navigates to the nearest luxury service center via the vehicle’s navigation system.
Overheat & Overload Protection: Activates when fluid temperature exceeds 140°C or torque exceeds 420 Nm, reducing engine power by 50% and triggering a urgent warning to prevent catastrophic damage.
Collision Safety: Integrates with the vehicle’s airbag system, automatically shifting to P position and engaging the parking pawl during a collision to prevent secondary accidents.
1. Luxury & High-Performance Vehicle OE-Premium Compatibility
Building on the 121000051AA’s versatility, the 121000098AA Transmission Assembly Gearbox targets high-end compact, mid-size luxury vehicles, and performance-oriented models equipped with 1.5T-2.0T high-output turbocharged and 2.0L-3.0L naturally aspirated (NA) engines. It achieves seamless compatibility with premium domestic models such as Hongqi H5 (2.0T), Lynk & Co 05 (2.0T), and joint-venture luxury models including Audi A3L (1.5T), BMW 1 Series (2.0T), and Mercedes-Benz A-Class L (2.0T). Adhering to luxury-grade OE standards, it supports 6-bolt precision bell housing patterns, 22-spline/24-spline high-strength input shafts, and 27-spline/30-spline output shafts, with an ultra-micro tolerance of ±0.05mm. This premium compatibility eliminates any fitment gaps, ensuring perfect synergy with luxury powertrains, avoiding TCU communication delays, powertrain vibration, or torque mismatch issues.
2. Ultra-High-Strength Construction for Extreme Torque
Gear System: Upgraded from 18CrNiMo7-6 to 20CrNi2Mo alloy steel (aerospace-grade material), the gear sets undergo deep vacuum carburizing (depth: 1.5-2.0mm), plasma quenching, and precision diamond honing, achieving a surface hardness of HRC 62-66 and core toughness of ≥105 J/cm². This enables the assembly to withstand continuous torque loads of up to 380 Nm—36% higher than the 121000051AA—perfectly matching the power output of 2.0T high-performance turbo engines (e.g., Lynk & Co 05’s 254hp engine).
Housing: Die-cast from ADC12 aluminum alloy with a carbon fiber reinforced polymer (CFRP) full-wrap reinforcement layer, the housing resists vibration (up to 45g) and thermal deformation, maintaining structural integrity in extreme temperatures ranging from -50°C to 150°C—adapting to polar cold, desert heat, and prolonged high-performance driving.
Sealing & Protection: Equipped with quadruple-lip Viton rubber seals (upgraded from triple-lip) and titanium-nickel alloy gaskets, it provides military-grade leakage resistance. The input shaft features a triple-labyrinth dust cover with a nano-ceramic hydrophobic coating, blocking dust, water, and corrosive substances, ensuring reliability in off-road, coastal, or high-dust environments.
3. Flagship-Grade Shift Performance & Efficiency
Shift Response: Equipped with a full-electronic precision valve body and ultra-high-frequency solenoids (response time ≤150ms—25% faster than 121000051AA), the 121000098AA achieves imperceptible gear transitions, eliminating any shift shudder or lag even under rapid torque spikes of 2.0T high-performance engines.
Gear Ratios: Optimized 6-speed automatic configuration (1st 3.300, 2nd 2.000, 3rd 1.350, 4th 1.000, 5th 0.800, 6th 0.650) tailored for luxury and performance models. The 6th overdrive gear reduces engine RPM by 25-30% at 120 km/h, improving fuel economy by 12-15% compared to worn transmissions—3-5% higher than the 121000051AA.
Adaptive Logic: Preloaded with multi-mode intelligent shift programs (Eco, Normal, Sport, Sport+, Comfort), adapting to diverse scenarios—Sport+ mode holds gears at redline for track-style acceleration, while Comfort mode softens shifts for cabin quietness.
4. Premium Cost-Effectiveness with Flagship Value
Priced only 20-25% higher than the 121000051AA but offering luxury-grade performance, 36% higher torque capacity, and 6-speed configuration, the 121000098AA delivers exceptional premium value. Its flagship modular design supports independent replacement of electronic valve bodies, solenoid packs, and clutch modules, cutting maintenance labor time by 40%. It is compatible with premium transmission fluids (ATF 6, DCTF) and supports lifetime oil filters (with regular fluid changes), reducing long-term maintenance costs by 30%.
5. Luxury-Grade Rigorous Quality Testing
Each assembly undergoes a 15-stage quality verification process (adding performance track testing and luxury quietness tests to the 121000051AA’s 12 stages): 3D laser scanning inspection, Vickers hardness testing, hydraulic pressure burst testing (3x operating pressure), dynamic shift simulation (10,000+ cycles under 380 Nm torque), noise level measurement (≤68 dB at idle), extreme temperature cycling (-50°C to 150°C), vibration resistance testing (45g), TCU luxury protocol compatibility testing, dynamometer track simulation (0-100km/h acceleration, high-speed cruising), torque overload testing, seal integrity testing (high-pressure water and dust spray), quietness testing (cabin noise measurement), material corrosion testing, and dual visual inspection (automated + manual). This ensures a failure rate of less than 0.1% within the first 80,000 kilometers.
6. Intelligent Luxury Installation & Maintenance
Installation: Features a luxury-grade 20-pin electrical connector with plug-and-play adapters for 16-pin/14-pin TCU interfaces, supporting automatic identification of luxury vehicle models and TCU protocol matching. Standardized precision mounting points require only professional basic tools, with a luxury vehicle-specific installation guide included.
Maintenance: Equipped with a smart digital monitoring system (standard) that transmits real-time fluid temperature, pressure, and wear status to the vehicle’s central control screen. The easily accessible filter and electronic dipstick simplify maintenance, while built-in wireless diagnostic functions support remote fault analysis—reducing service time by 50%.
INQUIRE NOW 
