Buick LeSabre unable to shift to second gear, car jumps and must be turned off to move forward on Buick LeSabre

Some Buick LeSabre owners report experiencing difficulties shifting to second gear, often requiring the vehicle to be turned off to move forward. This issue may stem from misaligned throttle position sensors, malfunctioning shift solenoids, or general wear and tear associated with higher mileage. Additionally, odd noises from the transmission or engine area when the car fails to move in drive may indicate problems with gears, linkage, or other components affecting proper shifting. A weak pressure control solenoid can also contribute to shifting difficulties, particularly when the transmission fluid warms up and thins out, leading to insufficient pressure for smooth gear changes. Furthermore, issues with the torque converter clutch not locking up could result from a failed solenoid or problems with the clutch itself, complicating the shifting process. It is recommended that owners have their Buick LeSabre inspected by a qualified mechanic to diagnose and resolve these shifting issues.