1993 Buick Park Avenue Owner's Manual - Page 198

Torque Lock (Automatic Transaxle) If you are parking on a hill and you don't shift your transaxle into "P" (Park) properly, the weight of the vehicle may put too much force on the parking pawl in the transaxle. You may find it difficult to pull the shift lever out of "F'" (Park). This is called "torque lock." To prevent torque lock, always be sure to shift into "P" (Park) properly before you leave the driver's seat. To find out how, see "Shifting Into 'P' (Park)" in the Index. When you are ready to drive, move the shift lever out of "P" (Park) BEFORE you release the parking brake. If "torque lock" does occur, you may need to have another vehicle push yours a little uphill to take some of the pressure from the transaxle, so you can pull the shift lever out of "P" (Park). If there isno curb when you're parking uphill, turn the wheels to theright. If there is no curb when you're parking uphill on the left side of a one-way street, your wheels should be turned to the left.