6T40 six-speed automatic transmission
The General Motors 6T40 transmission is an electronically controlled six-speed automatic transmission that has been used in various Chevrolet models:
Chevrolet models with 6T40 transmission:
*Chevrolet Cobalt
*Chevrolet HHR
*Chevrolet Malibu
*Chevrolet Sonic
*Chevrolet Spark
*Chevrolet Trax
6T40 gearbox specifications:
* Six gears with manual shift mode
* Hydraulic transformer with locking
* Electronic control
* Gear ratios:
* 1st gear: 4.07:1
* 2nd gear: 2.39:1
* 3rd gear: 1.57:1
* 4th gear: 1.14:1
* 5th gear: 0.85:1
* 6th gear: 0.67:1
* Reverse gear: 3.73:1
*Maximum torque: 280 Nm
Advantages of the 6T40 gearbox:
* Smooth and fast gear shifting
*Good fuel economy
* Compact and light weight
* Reliability
Disadvantages of the 6T40 gearbox:
*Can shift jerkily under hard acceleration
* Sometimes there are problems with solenoids and hydraulic accumulators
* Relatively high maintenance costs