What types of transmission issues were common with the 2007 Chevrolet TrailBlazer?

The 2007 Chevy TrailBlazer has had some transmission issues that have led to several Technical Service Bulletins (TSB). Most owners have reported difficulty shifting into specific gears, experiencing high RPMs without any movement, or struggling to switch to reverse. TSB #PIP4051C addresses rough shifting due to faulty wiring, which can be fixed by replacing the wiring as outlined in the bulletin. This TSB also covers transmission pump problems that may cause issues with electrical connections; dealers are advised to address this by smoothing the pump's edges. Another TSB, #08-07-30-027, describes a problem where the vehicle cannot shift into "drive" or "third" gears, requiring the replacement of the forward sprag assembly. Additionally, harsh shifting between first and second gears is covered under TSB #08-07-30-008B, which suggests replacing either the TCC solenoid, torque converter clutch valve, or a deteriorated turbine shaft O-ring seal to resolve the issue.