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Brand: C.oeft
OE numbers: 6T45E
Product Name: Transmission Control Unit TCU TCM
Compatible model: for Buick Regal GL8 Land Cruiser
Product status: Remanufactured
Number of teeth on the product: /
Product weight: 2.087KG
Packaging size: 63X41X36 cm
Product packaging: Neutral Package
Car series: American
Car type: For Buick
Scenario-Adaptive Shift Logic
The 6T45E TCM is equipped with a basic driving condition recognition system that classifies driving scenarios into 4 practical types ("urban commute", "highway cruising", "load-carrying", "eco-saving") by analyzing 800+ sets of real-time data (including throttle position, vehicle speed, and brake signal) stored in a standard EEPROM (write cycle of 100,000 times).
Urban Commute Mode: The TCM advances upshifting (e.g., shifting from 3rd to 4th gear at 50 km/h) and reduces the hydraulic pressure change rate by 25%, minimizing shifting shock in stop-and-go traffic. For the Buick Regal 2.4L, it maintains an engine speed range of 1,600-2,200 rpm in urban areas;
Load-Carrying Adaptation: Detected by the transmission load sensor (torque > 280 N·m), the TCM delays upshifting (e.g., shifting from 4th to 5th gear at 80 km/h) and increases hydraulic pressure by 0.1 MPa to prevent clutch slip. This is critical for the Buick GL8 when carrying 7 passengers and luggage;
Eco-Saving Mode: The TCM optimizes the shift map to prioritize high gears, activates early torque converter lock-up, and coordinates with the engine’s start-stop system. For the Chevrolet Equinox 2.4L, it reduces comprehensive fuel consumption by 8%-10% compared to normal mode;
Manual Shift Support: For models with steering wheel shift paddles (e.g., Chevrolet Cruze 1.6T), the TCM maintains the selected gear for 8 seconds after manual operation, then automatically resumes adaptive mode—balancing driving fun and practicality.
1. Wide Compatibility with GM Mid-Range Powertrains
The TCM’s hardware and software are fully optimized for GM’s mainstream powertrain ecosystem:
Transmission Compatibility: Exclusive adaptation to 6T45E transmissions (maximum torque 315 N·m), supporting engines with power up to 200 HP (e.g., Chevrolet Equinox 2.0T);
Brand-Specific Calibration: Buick version optimizes shift smoothness for multi-passenger scenarios, Chevrolet version enhances low-speed torque response for urban driving, and GMC version strengthens load-carrying gear retention;
Power System Adaptation: Compatible with GM’s Ecotec 1.6T, 2.0L, and 2.4L engines. It is pre-calibrated with the torque curves of these engines—for the 2.4L Ecotec, the TCM adjusts the hydraulic pressure to 2.2-2.5 MPa to transmit 240 N·m peak torque, ensuring stable power delivery.
2. Balanced Comfort and Cost-Efficiency
Practical Smoothness: The TCM’s hydraulic pressure control accuracy reaches ±0.05 MPa, and the shifting jerk amplitude is controlled below 2.5 m/s²—meeting the comfort needs of family travel without excessive cost;
Fuel-Efficient Design: Through 6-speed gear ratio optimization (overall gear ratio range 4.48-0.75) and early torque converter lock-up, the TCM reduces the transmission’s power loss by 15% compared to 4AT. The Buick LaCrosse 2.4L achieves a 9% lower fuel consumption than the 4AT predecessor;
Low Maintenance Cost: The TCM uses mature components (Delphi sensors, Bosch solenoids) with a replacement cost 40% lower than luxury brand TCUs, and ATF oil change intervals of 60,000 km—reducing long-term use costs.
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