On a small number of trucks, the steering transfer case was not properly filled with oil. As a result, the bearings may fail and the steering could lock-up.
Safety Risk
A loss of steering control could create the risk of a crash.
Corrective Actions
Mack will notify owners by mail and instruct you to take your truck to a dealer to inspect, and if necessary, replace the steering transfer case. To reduce the safety risk, Mack recommends that you should avoid driving your truck until this recall is completed.