Buick LeSabre transmission issue where vehicle won't move in drive but moves in reverse on Buick LeSabre

Some Buick LeSabre owners report experiencing transmission issues where the vehicle won't move in drive but operates in reverse. This problem may be linked to low or dirty transmission fluid, which can lead to shifting difficulties. Additionally, some owners have noted that shift linkage failures can prevent proper engagement in drive. Malfunctions in the torque converter have also been identified as a potential cause of this issue. Furthermore, if the vehicle does not function in certain gears, a gear shifter inspection is recommended, as the gear cable may require adjustment if it has stretched. Internal component failures within the transmission could also be a factor, along with potential transmission damage from failed components or stretched cables. Lastly, some owners have reported that issues with the speed sensor can result in the car only being able to reverse. It is advisable for owners experiencing these symptoms to consult a professional mechanic for a thorough diagnosis and necessary repairs.