One problem related to axle shaft has been reported for the 2008 Nissan Frontier. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Nissan Frontier based on all problems reported for the 2008 Frontier.
Upon pennsylvania state required inspection the inspector recognized that the rear seals of the axle were "leaking" fluid and that the fluid had saturated the entire braking assembly including the caliper, pads, rotor and emergency brake shoes causing the operation of the vehicle to be a hazard to the operator. When asked when this occurred the inspector said that it must have been this way for some time based on the amount of axle grease covering the braking mechanisms. For a driver of said vehicle there would be zero indications of failure of the seals due to high temperature when applying the brakes causing the oil to gel and/or burn away which would leave no visible signs of leakage on the ground. I feel that this causes an immediate danger to the driver and their occupants of the vehicle. The over all poor design of the axle shafts by Nissan engineering has allowed this situation to occur. A TSB currently exists for this issue and Nissan is aware of the problem.