- "Drive away shudder" is a vibration that occurs at first acceleration from a stop. Shudder vibration usually peaks at the engine's highest torque output. Shudder is a symptom associated with vehicles using a two-piece driveshaft. To decrease shudder, lower the center bearing in 1 / 8 in. increments. Use shim stock or fabricated plates.
- Plate stock must be able to maintain compression of the rubber insulator around the bearing. Do NOT use washers.
- Replace the original bolts with longer ones if required. Remember that the nut must be 100 percent engaged with the bolt and properly torqued for safety. Proper torque is 50 ft. lbs. (68 Nm).
- Mark the location of the bearing bracket against the frame crossmember before removing the bolts. Mark both side-to-side and front-to-back location.
Removal & Installation
Two types of bearings are in use. They are NOT interchangeable. If replacement is required, be sure the correct item is obtained. Removal is possible without removing the bearing bracket.
- Remove the rear propeller shaft.
- Remove the slip joint boot clamp and separate the halfshafts.
- Use a hammer and punch to tap the slinger away from the shaft to provide room for the bearing splitter.
- Install the bearing splitter and remove the bearing.
- Drive the new bearing onto the shaft until seated.
- Apply a good grade of bearing grease to the shaft splines.
- Align the master splines and slide the front and rear halfshafts together.
- Reposition the slip yoke boot and install a new clamp.
- Install the driveshaft.