If your 2008 Mazda CX-7 's transmission is slipping and there are no leaks, the solenoid is the next item that you should check. Clutch Problems The clutch is located within the torque converter and can occasionally become jammed. 2011 Mazda CX-7 transmission problems with 3 complaints from CX-7 owners. The worst complaints are has code p0753, transmission failed despite good maintenance history, and will not reverse. So, here is a list of the most common type of transmission problems. Low Fluid Levels or Leaks. Low levels of transmission fluid or transmission fluid leaks are by far the most common type of transmission problem. Low levels of transmission fluid are usually caused by leaks in the transmission system itself. Transmission Problems Mazda CX-7 transmission problems often reveal themselves as grinding or being jumpy during accelerations, shifting delays, whistle-like noise coming from the engine, car shaking while driving, or a burning smell coming from underneath the hood. P0730 - Incorrect Gear Ratio - This issue could be caused by a number of problems, including a fault in the transmission control module, dirty transmission fluid, or a bad transmission solenoid. P0657 - Voltage Problem in the 'A' Circuit - This transmission problem is often caused by a short, or bad ground on the PCM or PCM wiring I just had a problem with my CX-7 transmission sticking in 3rd gear. The engine light and AT light came on the friday before Christmas. I had to wait until the Tuesday after Christmas to take Should you buy a used mazda cx 7? Pros and cons, maintenance costs and common problems of the CX-7.Transmission problemsEngine reliability 2007 Mazda CX-7 4dr SUV. turbocharged 244hp 2.3L I4 6-speed shiftable automatic AWD. 40000 mi. US $850. After repair of complete brake system, including replacing front rotors, all pads and hardware, tech road test confirmed presence of a noise at rear wheels. Required replacement of rear wheel bearing assembly. One of the most common transmission issues for Mazda CX-7 is transmission slipping, where the transmission fails to engage properly and slips out of gear. This can be caused by various factors such as low fluid levels, worn clutch plates or bands, or a damaged valve body. w4SY.