Drive Axles, Bearings and Joints: Adjustments

Fig. 4 Measuring Driveshaft:

Fig. 8 Left Engine Mount Adjustment:

If the vertical bolts on both engine mounts have been loosened, or vehicle has experienced front structural damage, driveshaft length must be checked.
The engine mounts incorporate slotted bolt holes to permit side-to-side positioning of the engine, thereby affecting length of driveshaft. To check driveshaft length proceed as follows.
1. Position vehicle with wheels straight ahead and body weight distributed on all 4 tires.
2. Measure direct distance between inner edge of outboard boot to inner edge of inboard boot on both driveshafts.
3. Driveshaft length must be within specifications, refer to Transmission and Drivetrain/Drive/Propeller Shafts, Bearings and Joints/Drive/Propeller Shaft/Specifications.
a. Remove load from engine mounts by carefully supporting engine and transaxle assembly with a suitable jack.
b. Loosen right and left engine mount vertical bolts, then loosen only the right and front engine mount bracket-to-crossmember attaching bolts.
c. Pry engine to right or left as necessary to bring driveshaft length within specifications.
NOTE: Ensure left engine mount is sleeved over long support bolt and shaft, to provide lateral adjustment whether or not engine weight is removed.
d. On except 1989 New Yorker Landau and Dynasty models, torque vertical engine mount bolts to 27 lb-ft, and front and center left engine mount bolts to 40 lb-ft.
e. On 1989 New Yorker Landau and Dynasty models, torque vertical bolts to 60 lb-ft, and front and center left engine mount bolts to 40 lb-ft.